diff --git a/Persistence.API/Controllers/TechMessagesController.cs b/Persistence.API/Controllers/TechMessagesController.cs
index 10efb04..12b23b3 100644
--- a/Persistence.API/Controllers/TechMessagesController.cs
+++ b/Persistence.API/Controllers/TechMessagesController.cs
@@ -1,4 +1,4 @@
-using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Persistence.Models;
 using Persistence.Models.Requests;
@@ -44,17 +44,17 @@ public class TechMessagesController : ControllerBase
         return Ok(result);
     }
 
-    /// <summary>
-    /// Получить статистику по системам
-    /// </summary>
-    /// <param name="autoDrillingSystem"></param>
-    /// <param name="categoryIds"></param>
-    /// <param name="token"></param>
-    /// <returns></returns>
-    [HttpGet("statistics")]
-    public async Task<ActionResult<IEnumerable<MessagesStatisticDto>>> GetStatistics([FromQuery] IEnumerable<string> autoDrillingSystem, [FromQuery] IEnumerable<int> categoryIds, CancellationToken token)
-    {
-        var result = await techMessagesRepository.GetStatistics(autoDrillingSystem, categoryIds, token);
+	/// <summary>
+	/// Получить статистику по системам
+	/// </summary>
+	/// <param name="autoDrillingSystem"></param>
+	/// <param name="categoryIds"></param>
+	/// <param name="token"></param>
+	/// <returns></returns>
+	[HttpGet("statistics")]
+	public async Task<ActionResult<IEnumerable<MessagesStatisticDto>>> GetStatistics([FromQuery] IEnumerable<Guid> autoDrillingSystem, [FromQuery] IEnumerable<int> categoryIds, CancellationToken token)
+	{
+		var result = await techMessagesRepository.GetStatistics(autoDrillingSystem, categoryIds, token);
 
         return Ok(result);
     }
@@ -100,19 +100,20 @@ public class TechMessagesController : ControllerBase
         return Ok(result);
     }
 
-    /// <summary>
-    /// Добавить новые технологические сообщения
-    /// </summary>
-    /// <param name="dtos"></param>
-    /// <param name="token"></param>
-    /// <returns></returns>
-    [HttpPost]
-    [ProducesResponseType(typeof(int), (int)HttpStatusCode.Created)]
-    public async Task<IActionResult> AddRange([FromBody] IEnumerable<TechMessageDto> dtos, CancellationToken token)
-    {
-        var userId = User.GetUserId<Guid>();
+	/// <summary>
+	/// Добавить новые технологические сообщения
+	/// </summary>
+	/// <param name="systemId"></param>
+	/// <param name="dtos"></param>
+	/// <param name="token"></param>
+	/// <returns></returns>
+	[HttpPost("{systemId}")]
+	[ProducesResponseType(typeof(int), (int)HttpStatusCode.Created)]
+	public async Task<IActionResult> AddRange([FromRoute] Guid systemId, [FromBody] IEnumerable<TechMessageDto> dtos, CancellationToken token)
+	{
+		var userId = User.GetUserId<Guid>();
 
-        var result = await techMessagesRepository.AddRange(dtos, userId, token);
+        var result = await techMessagesRepository.AddRange(systemId, dtos, userId, token);
 
         return CreatedAtAction(nameof(AddRange), result);
     }
diff --git a/Persistence.Client/Clients/Interfaces/ITechMessagesClient.cs b/Persistence.Client/Clients/Interfaces/ITechMessagesClient.cs
index bbf635c..ce8a7ca 100644
--- a/Persistence.Client/Clients/Interfaces/ITechMessagesClient.cs
+++ b/Persistence.Client/Clients/Interfaces/ITechMessagesClient.cs
@@ -14,7 +14,7 @@ public interface ITechMessagesClient : IDisposable
 	/// <param name="dtos"></param>
 	/// <param name="token"></param>
 	/// <returns></returns>
-	Task<int> AddRange(IEnumerable<TechMessageDto> dtos, CancellationToken token);
+	Task<int> AddRange(Guid systemId, IEnumerable<TechMessageDto> dtos, CancellationToken token);
 
 	/// <summary>
 	/// Получить диапазон дат, для которых есть данные в репозитории
@@ -43,16 +43,16 @@ public interface ITechMessagesClient : IDisposable
 	/// <summary>
 	/// Получить статистику по системам
 	/// </summary>
-	/// <param name="autoDrillingSystem"></param>
+	/// <param name="systemIds"></param>
 	/// <param name="categoryId"></param>
 	/// <param name="token"></param>
 	/// <returns></returns>
-	Task<IEnumerable<MessagesStatisticDto>> GetStatistics(string autoDrillingSystem, int categoryId, CancellationToken token);
+	Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<Guid> systemIds, IEnumerable<int> categoryIds, CancellationToken token);
 
 	/// <summary>
 	/// Получить список всех систем
 	/// </summary>
 	/// <param name="token"></param>
 	/// <returns></returns>
-	Task<IEnumerable<string>> GetSystems(CancellationToken token);
+	Task<IEnumerable<DrillingSystemDto>> GetSystems(CancellationToken token);
 }
\ No newline at end of file
diff --git a/Persistence.Client/Clients/Interfaces/Refit/IRefitTechMessagesClient.cs b/Persistence.Client/Clients/Interfaces/Refit/IRefitTechMessagesClient.cs
index 64cb49e..138a0cd 100644
--- a/Persistence.Client/Clients/Interfaces/Refit/IRefitTechMessagesClient.cs
+++ b/Persistence.Client/Clients/Interfaces/Refit/IRefitTechMessagesClient.cs
@@ -1,4 +1,5 @@
-using Persistence.Models;
+using Microsoft.AspNetCore.Mvc;
+using Persistence.Models;
 using Persistence.Models.Requests;
 using Refit;
 
@@ -11,11 +12,11 @@ namespace Persistence.Client.Clients.Interfaces.Refit
         [Get($"{BaseRoute}")]
         Task<IApiResponse<PaginationContainer<TechMessageDto>>> GetPage([Query] PaginationRequest request, CancellationToken token);
 
-        [Post($"{BaseRoute}")]
-        Task<IApiResponse<int>> AddRange([Body] IEnumerable<TechMessageDto> dtos, CancellationToken token);
+        [Post($"{BaseRoute}/{{systemId}}")]
+        Task<IApiResponse<int>> AddRange(Guid systemId, [Body] IEnumerable<TechMessageDto> dtos, CancellationToken token);
 
         [Get($"{BaseRoute}/systems")]
-        Task<IApiResponse<IEnumerable<string>>> GetSystems(CancellationToken token);
+        Task<IApiResponse<IEnumerable<DrillingSystemDto>>> GetSystems(CancellationToken token);
 
         [Get($"{BaseRoute}/range")]
         Task<IApiResponse<DatesRangeDto>> GetDatesRangeAsync(CancellationToken token);
@@ -24,6 +25,6 @@ namespace Persistence.Client.Clients.Interfaces.Refit
         Task<IApiResponse<IEnumerable<TechMessageDto>>> GetPart(DateTimeOffset dateBegin, int take, CancellationToken token);
 
         [Get($"{BaseRoute}/statistics")]
-        Task<IApiResponse<IEnumerable<MessagesStatisticDto>>> GetStatistics([Query] string autoDrillingSystem, [Query] int categoryId, CancellationToken token);
+        Task<IApiResponse<IEnumerable<MessagesStatisticDto>>> GetStatistics([Query] IEnumerable<Guid> systemIds, [Query] IEnumerable<int> categoryIds, CancellationToken token);
     }
 }
diff --git a/Persistence.Client/Clients/TechMessagesClient.cs b/Persistence.Client/Clients/TechMessagesClient.cs
index c1000b1..7950784 100644
--- a/Persistence.Client/Clients/TechMessagesClient.cs
+++ b/Persistence.Client/Clients/TechMessagesClient.cs
@@ -24,17 +24,17 @@ public class TechMessagesClient : BaseClient, ITechMessagesClient
 		return result;
 	}
 
-	public async Task<int> AddRange(IEnumerable<TechMessageDto> dtos, CancellationToken token)
+	public async Task<int> AddRange(Guid systemId, IEnumerable<TechMessageDto> dtos, CancellationToken token)
 	{
 		var result = await ExecutePostResponse(
-			async () => await refitTechMessagesClient.AddRange(dtos, token), token);
+			async () => await refitTechMessagesClient.AddRange(systemId, dtos, token), token);
 
 		return result;
 	}
 
-	public async Task<IEnumerable<string>> GetSystems(CancellationToken token)
+	public async Task<IEnumerable<DrillingSystemDto>> GetSystems(CancellationToken token)
 	{
-		var result = await ExecuteGetResponse<IEnumerable<string>>(
+		var result = await ExecuteGetResponse<IEnumerable<DrillingSystemDto>>(
 			async () => await refitTechMessagesClient.GetSystems(token), token);
 
 		return result;
@@ -56,10 +56,10 @@ public class TechMessagesClient : BaseClient, ITechMessagesClient
 		return result;
 	}
 
-	public async Task<IEnumerable<MessagesStatisticDto>> GetStatistics(string autoDrillingSystem, int categoryId, CancellationToken token)
+	public async Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<Guid> systemIds, IEnumerable<int> categoryIds, CancellationToken token)
 	{
 		var result = await ExecuteGetResponse<IEnumerable<MessagesStatisticDto>>(
-			async () => await refitTechMessagesClient.GetStatistics(autoDrillingSystem, categoryId, token), token);
+			async () => await refitTechMessagesClient.GetStatistics(systemIds, categoryIds, token), token);
 
 		return result;
 	}
diff --git a/Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.Designer.cs b/Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.Designer.cs
similarity index 70%
rename from Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.Designer.cs
rename to Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.Designer.cs
index 6ed33f7..0124f24 100644
--- a/Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.Designer.cs
+++ b/Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.Designer.cs
@@ -9,10 +9,10 @@ using Persistence.Database.Model;
 
 #nullable disable
 
-namespace Persistence.Database.Postgres.Migrations
+namespace Persistence.Database.Postgres.Migrations.PersistencePostgres
 {
-    [DbContext(typeof(PersistenceDbContext))]
-    [Migration("20241202072250_TechMessageMigration")]
+    [DbContext(typeof(PersistencePostgresContext))]
+    [Migration("20241212041758_TechMessageMigration")]
     partial class TechMessageMigration
     {
         /// <inheritdoc />
@@ -48,6 +48,30 @@ namespace Persistence.Database.Postgres.Migrations
                     b.ToTable("DrillingSystem");
                 });
 
+            modelBuilder.Entity("Persistence.Database.Entity.ParameterData", b =>
+                {
+                    b.Property<Guid>("DiscriminatorId")
+                        .HasColumnType("uuid")
+                        .HasComment("Дискриминатор системы");
+
+                    b.Property<int>("ParameterId")
+                        .HasColumnType("integer")
+                        .HasComment("Id параметра");
+
+                    b.Property<DateTimeOffset>("Timestamp")
+                        .HasColumnType("timestamp with time zone")
+                        .HasComment("Временная отметка");
+
+                    b.Property<string>("Value")
+                        .IsRequired()
+                        .HasColumnType("varchar(256)")
+                        .HasComment("Значение параметра в виде строки");
+
+                    b.HasKey("DiscriminatorId", "ParameterId", "Timestamp");
+
+                    b.ToTable("ParameterData");
+                });
+
             modelBuilder.Entity("Persistence.Database.Entity.TechMessage", b =>
                 {
                     b.Property<Guid>("EventId")
@@ -59,27 +83,23 @@ namespace Persistence.Database.Postgres.Migrations
                         .HasColumnType("integer")
                         .HasComment("Id Категории важности");
 
-                    b.Property<double?>("Depth")
-                        .HasColumnType("double precision")
-                        .HasComment("Глубина забоя");
+                    b.Property<int>("EventState")
+                        .HasColumnType("integer")
+                        .HasComment("Статус события");
 
-                    b.Property<string>("MessageText")
+                    b.Property<Guid>("SystemId")
+                        .HasColumnType("uuid")
+                        .HasComment("Id системы, к которой относится сообщение");
+
+                    b.Property<string>("Text")
                         .IsRequired()
                         .HasColumnType("varchar(512)")
                         .HasComment("Текст сообщения");
 
-                    b.Property<Guid>("SystemId")
-                        .HasColumnType("uuid")
-                        .HasComment("Id системы автобурения, к которой относится сообщение");
-
                     b.Property<DateTimeOffset>("Timestamp")
                         .HasColumnType("timestamp with time zone")
                         .HasComment("Дата возникновения");
 
-                    b.Property<Guid>("UserId")
-                        .HasColumnType("uuid")
-                        .HasComment("Id пользователя за пультом бурильщика");
-
                     b.HasKey("EventId");
 
                     b.HasIndex("SystemId");
@@ -110,6 +130,59 @@ namespace Persistence.Database.Postgres.Migrations
                         });
                 });
 
+            modelBuilder.Entity("Persistence.Database.Model.ChangeLog", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid")
+                        .HasComment("Ключ записи");
+
+                    b.Property<DateTimeOffset>("Creation")
+                        .HasColumnType("timestamp with time zone")
+                        .HasComment("Дата создания записи");
+
+                    b.Property<double>("DepthEnd")
+                        .HasColumnType("double precision")
+                        .HasComment("Глубина забоя на дату окончания интервала");
+
+                    b.Property<double>("DepthStart")
+                        .HasColumnType("double precision")
+                        .HasComment("Глубина забоя на дату начала интервала");
+
+                    b.Property<Guid>("IdAuthor")
+                        .HasColumnType("uuid")
+                        .HasComment("Автор изменения");
+
+                    b.Property<Guid>("IdDiscriminator")
+                        .HasColumnType("uuid")
+                        .HasComment("Дискриминатор таблицы");
+
+                    b.Property<Guid?>("IdEditor")
+                        .HasColumnType("uuid")
+                        .HasComment("Редактор");
+
+                    b.Property<Guid?>("IdNext")
+                        .HasColumnType("uuid")
+                        .HasComment("Id заменяющей записи");
+
+                    b.Property<Guid>("IdSection")
+                        .HasColumnType("uuid")
+                        .HasComment("Ключ секции");
+
+                    b.Property<DateTimeOffset?>("Obsolete")
+                        .HasColumnType("timestamp with time zone")
+                        .HasComment("Дата устаревания (например при удалении)");
+
+                    b.Property<string>("Value")
+                        .IsRequired()
+                        .HasColumnType("jsonb")
+                        .HasComment("Значение");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ChangeLog");
+                });
+
             modelBuilder.Entity("Persistence.Database.Model.DataSaub", b =>
                 {
                     b.Property<DateTimeOffset>("Date")
diff --git a/Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.cs b/Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.cs
similarity index 81%
rename from Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.cs
rename to Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.cs
index 41ef8cb..c6806a4 100644
--- a/Persistence.Database.Postgres/Migrations/20241202072250_TechMessageMigration.cs
+++ b/Persistence.Database.Postgres/Migrations/20241212041758_TechMessageMigration.cs
@@ -2,7 +2,7 @@
 
 #nullable disable
 
-namespace Persistence.Database.Postgres.Migrations
+namespace Persistence.Database.Postgres.Migrations.PersistencePostgres
 {
     /// <inheritdoc />
     public partial class TechMessageMigration : Migration
@@ -30,10 +30,9 @@ namespace Persistence.Database.Postgres.Migrations
                     EventId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Id события"),
                     CategoryId = table.Column<int>(type: "integer", nullable: false, comment: "Id Категории важности"),
                     Timestamp = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, comment: "Дата возникновения"),
-                    Depth = table.Column<double>(type: "double precision", nullable: true, comment: "Глубина забоя"),
-                    MessageText = table.Column<string>(type: "varchar(512)", nullable: false, comment: "Текст сообщения"),
-                    SystemId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Id системы автобурения, к которой относится сообщение"),
-                    UserId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Id пользователя за пультом бурильщика")
+                    Text = table.Column<string>(type: "varchar(512)", nullable: false, comment: "Текст сообщения"),
+                    SystemId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Id системы, к которой относится сообщение"),
+                    EventState = table.Column<int>(type: "integer", nullable: false, comment: "Статус события")
                 },
                 constraints: table =>
                 {
diff --git a/Persistence.Database.Postgres/Migrations/PersistencePostgresContextModelSnapshot.cs b/Persistence.Database.Postgres/Migrations/PersistencePostgresContextModelSnapshot.cs
index 6ab8159..5a67396 100644
--- a/Persistence.Database.Postgres/Migrations/PersistencePostgresContextModelSnapshot.cs
+++ b/Persistence.Database.Postgres/Migrations/PersistencePostgresContextModelSnapshot.cs
@@ -1,6 +1,5 @@
 // <auto-generated />
 using System;
-using System.Collections.Generic;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
@@ -48,8 +47,8 @@ namespace Persistence.Database.Postgres.Migrations
 
             modelBuilder.Entity("Persistence.Database.Entity.ParameterData", b =>
                 {
-                    b.Property<int>("DiscriminatorId")
-                        .HasColumnType("integer")
+                    b.Property<Guid>("DiscriminatorId")
+                        .HasColumnType("uuid")
                         .HasComment("Дискриминатор системы");
 
                     b.Property<int>("ParameterId")
@@ -81,27 +80,23 @@ namespace Persistence.Database.Postgres.Migrations
                         .HasColumnType("integer")
                         .HasComment("Id Категории важности");
 
-                    b.Property<double?>("Depth")
-                        .HasColumnType("double precision")
-                        .HasComment("Глубина забоя");
+                    b.Property<int>("EventState")
+                        .HasColumnType("integer")
+                        .HasComment("Статус события");
 
-                    b.Property<string>("MessageText")
+                    b.Property<Guid>("SystemId")
+                        .HasColumnType("uuid")
+                        .HasComment("Id системы, к которой относится сообщение");
+
+                    b.Property<string>("Text")
                         .IsRequired()
                         .HasColumnType("varchar(512)")
                         .HasComment("Текст сообщения");
 
-                    b.Property<Guid>("SystemId")
-                        .HasColumnType("uuid")
-                        .HasComment("Id системы автобурения, к которой относится сообщение");
-
                     b.Property<DateTimeOffset>("Timestamp")
                         .HasColumnType("timestamp with time zone")
                         .HasComment("Дата возникновения");
 
-                    b.Property<Guid>("UserId")
-                        .HasColumnType("uuid")
-                        .HasComment("Id пользователя за пультом бурильщика");
-
                     b.HasKey("EventId");
 
                     b.HasIndex("SystemId");
@@ -137,48 +132,48 @@ namespace Persistence.Database.Postgres.Migrations
                     b.Property<Guid>("Id")
                         .ValueGeneratedOnAdd()
                         .HasColumnType("uuid")
-                        .HasColumnName("Id");
+                        .HasComment("Ключ записи");
 
                     b.Property<DateTimeOffset>("Creation")
                         .HasColumnType("timestamp with time zone")
-                        .HasColumnName("Creation");
+                        .HasComment("Дата создания записи");
 
                     b.Property<double>("DepthEnd")
                         .HasColumnType("double precision")
-                        .HasColumnName("DepthEnd");
+                        .HasComment("Глубина забоя на дату окончания интервала");
 
                     b.Property<double>("DepthStart")
                         .HasColumnType("double precision")
-                        .HasColumnName("DepthStart");
+                        .HasComment("Глубина забоя на дату начала интервала");
 
                     b.Property<Guid>("IdAuthor")
                         .HasColumnType("uuid")
-                        .HasColumnName("IdAuthor");
+                        .HasComment("Автор изменения");
 
                     b.Property<Guid>("IdDiscriminator")
                         .HasColumnType("uuid")
-                        .HasColumnName("IdDiscriminator");
+                        .HasComment("Дискриминатор таблицы");
 
                     b.Property<Guid?>("IdEditor")
                         .HasColumnType("uuid")
-                        .HasColumnName("IdEditor");
+                        .HasComment("Редактор");
 
                     b.Property<Guid?>("IdNext")
                         .HasColumnType("uuid")
-                        .HasColumnName("IdNext");
+                        .HasComment("Id заменяющей записи");
 
                     b.Property<Guid>("IdSection")
                         .HasColumnType("uuid")
-                        .HasColumnName("IdSection");
+                        .HasComment("Ключ секции");
 
                     b.Property<DateTimeOffset?>("Obsolete")
                         .HasColumnType("timestamp with time zone")
-                        .HasColumnName("Obsolete");
+                        .HasComment("Дата устаревания (например при удалении)");
 
-                    b.Property<IDictionary<string, object>>("Value")
+                    b.Property<string>("Value")
                         .IsRequired()
                         .HasColumnType("jsonb")
-                        .HasColumnName("Value");
+                        .HasComment("Значение");
 
                     b.HasKey("Id");
 
diff --git a/Persistence.Database/Entity/TechMessage.cs b/Persistence.Database/Entity/TechMessage.cs
index 8051415..e94d141 100644
--- a/Persistence.Database/Entity/TechMessage.cs
+++ b/Persistence.Database/Entity/TechMessage.cs
@@ -1,4 +1,4 @@
-using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
@@ -15,19 +15,16 @@ namespace Persistence.Database.Entity
         [Comment("Дата возникновения")]
         public DateTimeOffset Timestamp { get; set; }
 
-        [Comment("Глубина забоя")]
-        public double? Depth { get; set; }
+		[Column(TypeName = "varchar(512)"), Comment("Текст сообщения")]
+		public required string Text { get; set; }
 
-        [Column(TypeName = "varchar(512)"), Comment("Текст сообщения")]
-        public required string MessageText { get; set; }
-
-        [Required, Comment("Id системы автобурения, к которой относится сообщение")]
-        public required Guid SystemId { get; set; }
+		[Required, Comment("Id системы, к которой относится сообщение")]
+		public required Guid SystemId { get; set; }
 
         [Required, ForeignKey(nameof(SystemId)), Comment("Система автобурения, к которой относится сообщение")]
         public virtual required DrillingSystem System { get; set; }
 
-        [Comment("Id пользователя за пультом бурильщика")]
-        public Guid UserId { get; set; }
-    }
+		[Comment("Статус события")]
+		public int EventState { get; set; }
+	}
 }
diff --git a/Persistence.IntegrationTests/Controllers/TechMessagesControllerTest.cs b/Persistence.IntegrationTests/Controllers/TechMessagesControllerTest.cs
index 3ec7fce..97c0621 100644
--- a/Persistence.IntegrationTests/Controllers/TechMessagesControllerTest.cs
+++ b/Persistence.IntegrationTests/Controllers/TechMessagesControllerTest.cs
@@ -4,6 +4,7 @@ using Persistence.Client;
 using Persistence.Client.Clients.Interfaces;
 using Persistence.Database.Entity;
 using Persistence.Models;
+using Persistence.Models.Enumerations;
 using Persistence.Models.Requests;
 using System.Net;
 using Xunit;
@@ -50,18 +51,18 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.Equal(requestDto.Take, response.Take);
 		}
 
-        [Fact]
-        public async Task GetPage_AfterSave_returns_success()
-        {
-            //arrange
-            var dtos = await InsertRange();
-            var dtosCount = dtos.Count();
-            var requestDto = new PaginationRequest()
-            {
-                Skip = 0,
-                Take = 2,
-                SortSettings = nameof(TechMessage.CategoryId)
-            };
+		[Fact]
+		public async Task GetPage_AfterSave_returns_success()
+		{
+			//arrange
+			var dtos = await InsertRange(Guid.NewGuid());
+			var dtosCount = dtos.Count();
+			var requestDto = new PaginationRequest()
+			{
+				Skip = 0,
+				Take = 2,
+				SortSettings = nameof(TechMessage.CategoryId)
+			};
 
             //act
             var response = await techMessagesClient.GetPage(requestDto, CancellationToken.None);
@@ -71,17 +72,18 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.Equal(dtosCount, response.Count);
 		}
 
-        [Fact]
-        public async Task InsertRange_returns_success()
-        {
-            await InsertRange();
-        }
+		[Fact]
+		public async Task InsertRange_returns_success()
+		{
+			await InsertRange(Guid.NewGuid());
+		}
 
 		[Fact]
 		public async Task InsertRange_returns_BadRequest()
 		{
 			//arrange
 			const string exceptionMessage = "Ошибка валидации, формата или маршрутизации запроса";
+			var systemId = Guid.NewGuid();
 			var dtos = new List<TechMessageDto>()
 			{
 				new TechMessageDto()
@@ -89,17 +91,15 @@ namespace Persistence.IntegrationTests.Controllers
 					EventId = Guid.NewGuid(),
 					CategoryId = -1, // < 0
 					Timestamp = DateTimeOffset.UtcNow,
-                    Depth = -1, // < 0
-					MessageText = string.Empty, // length < 0
-					System = string.Concat(Enumerable.Repeat(nameof(TechMessageDto.System), 100)), // length > 256
-					UserId = Guid.NewGuid()
-                }
-            };
+					Text = string.Empty, // length < 0
+					EventState = EventState.Triggered
+				}
+			};
 
 			try
 			{
 				//act
-				var response = await techMessagesClient.AddRange(dtos, new CancellationToken());
+				var response = await techMessagesClient.AddRange(systemId, dtos, new CancellationToken());
 			}
 			catch (Exception ex)
 			{
@@ -124,23 +124,19 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.Empty(response);
 		}
 
-        [Fact]
-        public async Task GetSystems_AfterSave_returns_success()
-        {
-            //arrange
-            var dtos = await InsertRange();
-            var systems = dtos
-                .Select(e => e.System)
-                .Distinct()
-                .ToArray();
+		[Fact]
+		public async Task GetSystems_AfterSave_returns_success()
+		{
+			//arrange
+			var dtos = await InsertRange(Guid.NewGuid());
 
             //act
             var response = await techMessagesClient.GetSystems(CancellationToken.None);
 
 			//assert
 			Assert.NotNull(response);
-			string?[]? content = response?.ToArray();
-			Assert.Equal(systems, content);
+			var expectedSystemCount = 1;
+			Assert.Equal(expectedSystemCount, response!.Count());
 		}
 
         [Fact]
@@ -151,34 +147,35 @@ namespace Persistence.IntegrationTests.Controllers
             dbContext.CleanupDbSet<TechMessage>();
             dbContext.CleanupDbSet<Database.Entity.DrillingSystem>();
 
-            var importantId = 1;
-            var autoDrillingSystem = nameof(TechMessageDto.System);
+			var imortantIds = new [] { 1 };
+			var systemIds = new [] { Guid.NewGuid() };
 
-            //act
-            var response = await techMessagesClient.GetStatistics(autoDrillingSystem, importantId, CancellationToken.None);
+			//act
+			var response = await techMessagesClient.GetStatistics(systemIds, imortantIds, CancellationToken.None);
 
 			//assert
 			Assert.NotNull(response);
 			Assert.Empty(response);
 		}
 
-        [Fact]
-        public async Task GetStatistics_AfterSave_returns_success()
-        {
-            //arrange
-            var importantId = 0;
-            var autoDrillingSystem = nameof(TechMessageDto.System);
-            var dtos = await InsertRange();
-            var filteredDtos = dtos.Where(e => e.CategoryId == importantId && e.System == autoDrillingSystem);
+		[Fact]
+		public async Task GetStatistics_AfterSave_returns_success()
+		{
+			//arrange
+			var categoryIds = new[] { 1 };
+			var systemId = Guid.NewGuid();
+			var dtos = await InsertRange(systemId);
+			var filteredDtos = dtos.Where(e => categoryIds.Contains(e.CategoryId));
 
-            //act
-            var response = await techMessagesClient.GetStatistics(autoDrillingSystem, importantId, CancellationToken.None);
+			//act
+			var response = await techMessagesClient.GetStatistics([systemId], categoryIds, CancellationToken.None);
 
 			//assert
 			Assert.NotNull(response);
+			Assert.NotEmpty(response);
 			var categories = response
-				.FirstOrDefault()?.Categories
-				.FirstOrDefault(e => e.Key == 0).Value;
+				.FirstOrDefault()!.Categories
+				.Count();
 			Assert.Equal(filteredDtos.Count(), categories);
 		}
 
@@ -199,11 +196,11 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.Equal(DateTimeOffset.MaxValue, response?.To);
 		}
 
-        [Fact]
-        public async Task GetDatesRange_AfterSave_returns_success()
-        {
-            //arrange
-            await InsertRange();
+		[Fact]
+		public async Task GetDatesRange_AfterSave_returns_success()
+		{
+			//arrange
+			await InsertRange(Guid.NewGuid());
 
             //act
             var response = await techMessagesClient.GetDatesRangeAsync(CancellationToken.None);
@@ -229,13 +226,13 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.Empty(response);
 		}
 
-        [Fact]
-        public async Task GetPart_AfterSave_returns_success()
-        {
-            //arrange
-            var dateBegin = DateTimeOffset.UtcNow;
-            var take = 1;
-            await InsertRange();
+		[Fact]
+		public async Task GetPart_AfterSave_returns_success()
+		{
+			//arrange
+			var dateBegin = DateTimeOffset.UtcNow;
+			var take = 1;
+			await InsertRange(Guid.NewGuid());
 
             //act
             var response = await techMessagesClient.GetPart(dateBegin, take, CancellationToken.None);
@@ -245,40 +242,36 @@ namespace Persistence.IntegrationTests.Controllers
 			Assert.NotEmpty(response);
 		}
 
-        private async Task<IEnumerable<TechMessageDto>> InsertRange()
-        {
-            //arrange
-            memoryCache.Remove(SystemCacheKey);
-            dbContext.CleanupDbSet<TechMessage>();
-            dbContext.CleanupDbSet<DrillingSystem>();
+		private async Task<IEnumerable<TechMessageDto>> InsertRange(Guid systemId)
+		{
+			//arrange
+			memoryCache.Remove(SystemCacheKey);
+			dbContext.CleanupDbSet<TechMessage>();
+			dbContext.CleanupDbSet<DrillingSystem>();
 
-            var dtos = new List<TechMessageDto>()
-            {
-                new()
-                {
-                    EventId = Guid.NewGuid(),
-                    CategoryId = 1,
-                    Timestamp = DateTimeOffset.UtcNow,
-                    Depth = 1.11,
-                    MessageText = nameof(TechMessageDto.MessageText),
-                    System = nameof(TechMessageDto.System).ToLower(),
-                    UserId = Guid.NewGuid()
-                },
-                new()
-                {
-                    EventId = Guid.NewGuid(),
-                    CategoryId = 2,
-                    Timestamp = DateTimeOffset.UtcNow,
-                    Depth = 2.22,
-                    MessageText = nameof(TechMessageDto.MessageText),
-                    System = nameof(TechMessageDto.System).ToLower(),
-                    UserId = Guid.NewGuid()
-                }
-            };
+			var dtos = new List<TechMessageDto>()
+			{
+				new TechMessageDto()
+				{
+					EventId = Guid.NewGuid(),
+					CategoryId = 1,
+					Timestamp = DateTimeOffset.UtcNow,
+					Text = nameof(TechMessageDto.Text),
+					EventState = Models.Enumerations.EventState.Triggered
+				},
+				new TechMessageDto()
+				{
+					EventId = Guid.NewGuid(),
+					CategoryId = 2,
+					Timestamp = DateTimeOffset.UtcNow,
+					Text = nameof(TechMessageDto.Text),
+					EventState = Models.Enumerations.EventState.Triggered
+				}
+			};
 
 
-            //act
-            var response = await techMessagesClient.AddRange(dtos, CancellationToken.None);
+			//act
+			var response = await techMessagesClient.AddRange(systemId, dtos, CancellationToken.None);
 
 			//assert
 			Assert.Equal(dtos.Count, response);
diff --git a/Persistence.Repository/Repositories/TechMessagesRepository.cs b/Persistence.Repository/Repositories/TechMessagesRepository.cs
index db59f63..0b13bc4 100644
--- a/Persistence.Repository/Repositories/TechMessagesRepository.cs
+++ b/Persistence.Repository/Repositories/TechMessagesRepository.cs
@@ -1,6 +1,7 @@
 using Mapster;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Caching.Memory;
+using Newtonsoft.Json.Linq;
 using Persistence.Database.Entity;
 using Persistence.Models;
 using Persistence.Models.Requests;
@@ -50,19 +51,18 @@ namespace Persistence.Repository.Repositories
             return dto;
         }
 
-        public async Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<string> autoDrillingSystem, IEnumerable<int> categoryIds, CancellationToken token)
-        {
-            var query = GetQueryReadOnly();
-            var systems = autoDrillingSystem.Select(s => s.ToLower().Trim());
-            var result = await query
-                .Where(e => !systems.Any() || systems.Contains(e.System.Name.ToLower().Trim()))
-                .GroupBy(e => e.System.Name, (key, group) => new
-                {
-                    System = key,
-                    Categories = group
-                        .Where(g => !categoryIds.Any() || categoryIds.Contains(g.CategoryId))
-                })
-                .ToArrayAsync(token);
+		public async Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<Guid> systems, IEnumerable<int> categoryIds, CancellationToken token)
+		{
+			var query = GetQueryReadOnly();
+			var result = await query
+				.Where(e => systems.Count() == 0 || systems.Contains(e.System.SystemId))
+				.GroupBy(e => e.System.Name, (key, group) => new
+				{
+					System = key,
+					Categories = group
+						.Where(g => categoryIds.Count() == 0 || categoryIds.Contains(g.CategoryId))
+				})
+				.ToArrayAsync(token);
 
             var entities = new List<MessagesStatisticDto>();
             foreach (var e in result)
@@ -81,27 +81,16 @@ namespace Persistence.Repository.Repositories
             return entities;
         }
 
-        public async Task<IEnumerable<string>> GetSystems(CancellationToken token)
-        {
-            var entities = await GetDrillingSystems(token);
-            var result = entities.Select(e => e.Name);
+		public async Task<int> AddRange(Guid systemId, IEnumerable<TechMessageDto> dtos, Guid userId, CancellationToken token)
+		{
 
-            return result;
-        }
+			var entities = new List<TechMessage>();
+			foreach (var dto in dtos)
+			{
+				var entity = dto.Adapt<TechMessage>();
 
-        public async Task<int> AddRange(IEnumerable<TechMessageDto> dtos, Guid userId, CancellationToken token)
-        {
-
-            var entities = new List<TechMessage>();
-            foreach (var dto in dtos)
-            {
-                var entity = dto.Adapt<TechMessage>();
-                var systems = await GetDrillingSystems(token);
-                var systemId = systems.FirstOrDefault(e => e.Name.ToLower().Trim() == dto.System.ToLower().Trim())?.SystemId
-                    ?? await CreateDrillingSystem(dto.System, token);
-
-                entity.SystemId = systemId;
-                entity.UserId = userId;
+				await CreateSystemIfNotExist(systemId, token);
+				entity.SystemId = systemId;
 
                 entities.Add(entity);
             }
@@ -125,54 +114,61 @@ namespace Persistence.Repository.Repositories
             return dtos;
         }
 
-        public async Task<DatesRangeDto> GetDatesRangeAsync(CancellationToken token)
-        {
-            var query = GetQueryReadOnly()
-                .GroupBy(e => 1)
-                .Select(group => new
-                {
-                    Min = group.Min(e => e.Timestamp),
-                    Max = group.Max(e => e.Timestamp),
-                });
-            var values = await query.FirstOrDefaultAsync(token);
-            var result = new DatesRangeDto()
-            {
-                From = values?.Min ?? DateTimeOffset.MinValue,
-                To = values?.Max ?? DateTimeOffset.MaxValue
-            };
+		public async Task<IEnumerable<DrillingSystemDto>> GetSystems(CancellationToken token)
+		{
+			var systems = await memoryCache.GetOrCreateAsync(SystemCacheKey, async f =>
+			{
+				f.AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(CacheExpirationInMinutes);
+
+				var query = db.Set<Database.Entity.DrillingSystem>();
+				var entities = await query.ToListAsync(token);
+				var dtos = entities.Select(e => e.Adapt<Models.DrillingSystemDto>());
+
+				return dtos;
+			});
+
+			return systems ?? [];
+		}
+
+		public async Task<DatesRangeDto> GetDatesRangeAsync(CancellationToken token)
+		{
+			var query = GetQueryReadOnly()
+				.GroupBy(e => 1)
+				.Select(group => new
+				{
+					Min = group.Min(e => e.Timestamp),
+					Max = group.Max(e => e.Timestamp),
+				});
+			var values = await query.FirstOrDefaultAsync(token);
+			var result = new DatesRangeDto()
+			{
+				From = values?.Min ?? DateTimeOffset.MinValue,
+				To = values?.Max ?? DateTimeOffset.MaxValue
+			};
 
             return result;
         }
 
-        private async Task<IEnumerable<Models.DrillingSystemDto>> GetDrillingSystems(CancellationToken token)
-        {
-            var systems = await memoryCache.GetOrCreateAsync(SystemCacheKey, async f =>
-            {
-                f.AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(CacheExpirationInMinutes);
+		private async Task CreateSystemIfNotExist(Guid systemId, CancellationToken token)
+		{
+			var systems = await GetSystems(token);
+			var system = systems?.FirstOrDefault(e => e.SystemId == systemId);
 
-                var query = db.Set<Database.Entity.DrillingSystem>();
-                var entities = await query.ToListAsync(token);
-                var dtos = entities.Select(e => e.Adapt<Models.DrillingSystemDto>());
+			if (system == null) 
+			{
+				system = new DrillingSystemDto()
+				{
+					SystemId = systemId,
+					Name = string.Empty
+				};
 
-                return dtos;
-            });
+				var entity = system.Adapt<DrillingSystem>();
 
-            return systems!;
-        }
-        private async Task<Guid> CreateDrillingSystem(string name, CancellationToken token)
-        {
-            memoryCache.Remove(SystemCacheKey);
+				await db.Set<Database.Entity.DrillingSystem>().AddAsync(entity);
+				await db.SaveChangesAsync(token);
 
-            var entity = new DrillingSystem()
-            {
-                SystemId = Uuid7.Guid(),
-                Name = name.ToLower().Trim()
-            };
-
-            await db.Set<DrillingSystem>().AddAsync(entity, token);
-            await db.SaveChangesAsync(token);
-
-            return entity.SystemId;
-        }
-    }
+				memoryCache.Remove(SystemCacheKey);
+			}
+		}
+	}
 }
diff --git a/Persistence/Models/Enumerations/EventState.cs b/Persistence/Models/Enumerations/EventState.cs
new file mode 100644
index 0000000..3f4103c
--- /dev/null
+++ b/Persistence/Models/Enumerations/EventState.cs
@@ -0,0 +1,6 @@
+namespace Persistence.Models.Enumerations;
+public enum EventState
+{
+	NotTriggered = 0,
+	Triggered = 1,
+}
diff --git a/Persistence/Models/TechMessageDto.cs b/Persistence/Models/TechMessageDto.cs
index 927ba83..e076443 100644
--- a/Persistence/Models/TechMessageDto.cs
+++ b/Persistence/Models/TechMessageDto.cs
@@ -1,4 +1,5 @@
-using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations;
+using Persistence.Models.Enumerations;
 
 namespace Persistence.Models
 {
@@ -24,29 +25,16 @@ namespace Persistence.Models
         /// </summary>
         public DateTimeOffset Timestamp { get; set; }
 
-        /// <summary>
-        /// Глубина забоя
-        /// </summary>
-        [Range(0, double.MaxValue, ErrorMessage = "Глубина забоя не может быть меньше 0")]
-        public double? Depth { get; set; }
+		/// <summary>
+		/// Текст сообщения
+		/// </summary>
+		[Required]
+		[StringLength(512, MinimumLength = 1, ErrorMessage = "Допустимая длина текста сообщения от 1 до 512 символов")]
+		public required string Text { get; set; }
 
-        /// <summary>
-        /// Текст сообщения
-        /// </summary>
-        [Required]
-        [StringLength(512, MinimumLength = 1, ErrorMessage = "Допустимая длина текста сообщения от 1 до 512 символов")]
-        public required string MessageText { get; set; }
-
-        /// <summary>
-        /// Система автобурения, к которой относится сообщение
-        /// </summary>
-        [Required]
-        [StringLength(256, MinimumLength = 1, ErrorMessage = "Допустимая длина наименования системы АБ от 1 до 256 символов")]
-        public required string System { get; set; }
-
-        /// <summary>
-        /// Id пользователя за пультом бурильщика
-        /// </summary>
-        public Guid UserId { get; set; }
-    }
+		/// <summary>
+		/// Статус события
+		/// </summary>
+		public EventState EventState { get; set; }
+	}
 }
diff --git a/Persistence/Repositories/ITechMessagesRepository.cs b/Persistence/Repositories/ITechMessagesRepository.cs
index ae92912..c442e94 100644
--- a/Persistence/Repositories/ITechMessagesRepository.cs
+++ b/Persistence/Repositories/ITechMessagesRepository.cs
@@ -22,14 +22,14 @@ namespace Persistence.Repositories
         /// <param name="dtos"></param>
         /// <param name="token"></param>
         /// <returns></returns>
-        Task<int> AddRange(IEnumerable<TechMessageDto> dtos, Guid userId, CancellationToken token);
+        Task<int> AddRange(Guid systemId, IEnumerable<TechMessageDto> dtos, Guid userId, CancellationToken token);
 
         /// <summary>
-        /// Получение списка уникальных названий систем АБ
+        /// Получение списка систем
         /// </summary>
         /// <param name="token"></param>
         /// <returns></returns>
-        Task<IEnumerable<string>> GetSystems(CancellationToken token);
+        Task<IEnumerable<DrillingSystemDto>> GetSystems(CancellationToken token);
 
         /// <summary>
         /// Получение количества сообщений по категориям и системам автобурения
@@ -38,7 +38,7 @@ namespace Persistence.Repositories
         /// <param name="autoDrillingSystem">Система автобурения</param>
         /// <param name="token"></param>
         /// <returns></returns>
-        Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<string> autoDrillingSystem, IEnumerable<int> categoryIds, CancellationToken token);
+        Task<IEnumerable<MessagesStatisticDto>> GetStatistics(IEnumerable<Guid> autoDrillingSystem, IEnumerable<int> categoryIds, CancellationToken token);
 
         /// <summary>
         /// Получить порцию записей, начиная с заданной даты