Update for Firmware Version V4.0 (#88)

V4.0 for the S7-1500 is available:
[Download](https://support.industry.siemens.com/cs/document/109478459/firmware-update-s7-1500-cpus-incl-displays-and-et-200-cpus-(et-200sp-et-200pro)?dti=0&lc=en-DE)
Therefore the according [new Web-Api Methods](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#treeId=7a2b693b7e1b49654c384cde0ede92de) shall also be supported by this library.

- [x] ​[​WebServer.ReadResponseHeaders](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] ​[​WebServer.ChangeResponseHeaders](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [Api.GetSessionInfo](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [​WebApp.SetVersion](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [​WebApp.SetUrlRedirectMode](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] Technology.BrowseObjects 
- [x] Technology.Read 
- [x] [Plc.ReadCpuType](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [​Plc.ReadStationName](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [​Plc.ReadModuleName](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)

Redundancy:
- [x] [Redundancy.ReadSystemInformation](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [Redundancy.ReadSystemState](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [Redundancy.RequestChangeSystemState](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)
- [x] [​Redundancy.ReadSyncupProgress](https://cache.industry.siemens.com/dl/dl-media/246/109977246/att_1307004/v1/185361597835_en-US/en-US/index.html#)

README.md

@@ -244,6 +244,7 @@ Plc Version | Client Library Version
 2.9.x              | 2.0.x
 3.0.x              | 2.1.x
 3.1.x              | 2.2.x
+4.0.x              | 3.0.x
 
 ## SIMATIC S7-1200:
 Plc Version | Client Library Version

src/Webserver.API/Enums/ApiAlarmAcknowledgementState.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiAlarmsBrowseFilterAttribute.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiAuthenticationMode.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;
@@ -9,12 +9,15 @@ namespace Siemens.Simatic.S7.Webserver.API.Enums
 {
     /// <summary>
     /// User Authentication modes of the PLC.<br/>
-    /// Depends on the configured user management which authentication modes will be supported by the PLC<br/>
-    /// based on the authentication mode.
+    /// Depends on the configured user management which authentication modes will be supported by the PLC based on the authentication mode.
     /// </summary>
     [JsonConverter(typeof(StringEnumConverter), converterParameters: typeof(SnakeCaseNamingStrategy))]
     public enum ApiAuthenticationMode
     {
+        /// <summary>
+        /// The users are stored on the PLC
+        /// </summary>
+        Local,
         /// <summary>
         /// Legacy User Management
         /// </summary>
@@ -24,8 +27,8 @@ public enum ApiAuthenticationMode
         /// </summary>
         Disabled,
         /// <summary>
-        /// The users are stored on the PLC
+        /// Central User Management (via remote authentication with Username and Password)
         /// </summary>
-        Local
+        Umc,
     }
 }

src/Webserver.API/Enums/ApiBrowseFilterMode.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiDayOfWeek.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiDiagnosticBufferBrowseFilterAttributes.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiErrorCode.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 
@@ -53,9 +53,11 @@ public enum ApiErrorCode
         /// </summary>
         SystemIsReadOnly = 5,
         /// <summary>
-        /// The password change cannot be performed. This is caused for example if an older PLC project is present where password changes are not supported.
+        /// Not accepted in login: The authentication cannot be performed. This may happen because the requested mode is not supported by the PLC. <br/>
+        /// Not accepted in password change: The password change cannot be performed. This is caused for example if an older PLC project is present where password changes are not supported.
+        /// The execution of the requested method has not been accepted due to a method-specific restriction.
         /// </summary>
-        PasswordChangeNotAccepted = 6,
+        NotAccepted = 6,
         /// <summary>
         /// The data of a PLC of an R/H system is not accessible.
         /// This may happen if the system is in state Syncup or RUN-redundant or if the service data of the partner PLC has been requested.
@@ -83,6 +85,10 @@ public enum ApiErrorCode
         /// </summary>
         NewPasswordMatchesOldPassword = 104,
         /// <summary>
+        /// Authentication on the UMC server was not successful. This may happen due to various reasons, e.g. the UMC server could not be reached by the PLC.
+        /// </summary>
+        InfrastructureError = 105,
+        /// <summary>
         /// The requested address does not exist or the webserver cannot access the requested address.
         /// Die angeforderte Adresse existiert nicht oder der Webserver kann nicht auf die angeforderte Adresse zugreifen.
         /// </summary>
@@ -173,6 +179,10 @@ public enum ApiErrorCode
         /// </summary>
         ResourceLimitReached = 509,
         /// <summary>
+        /// The version string provided does not meet the criteria of a valid version string.
+        /// </summary>
+        InvalidVersionString = 510,
+        /// <summary>
         /// The proposed modification time is inalid. Adjust the proposed modification before calling this method again.
         /// Die vorgesehene Änderungszeit liegt außerhalb des zulässigen Zeitfensters für die Änderungszeit. Verringern Sie die Änderungszeit entsprechend, bevor Sie diese Methode aufrufen.
         /// </summary>
@@ -228,6 +238,32 @@ public enum ApiErrorCode
         /// </summary>
         InvalidHwId = 1100,
         /// <summary>
+        /// The provided pattern is not in the allowed list. Choose a pattern that is allowed to be configured.
+        /// </summary>
+        InvalidPattern = 1301,
+        /// <summary>
+        /// At least one of the provided HTTP headers is not part in the allowed list. Choose a HTTP header that is allowed to be set.
+        /// </summary>
+        HTTPHeaderNotAllowed = 1302,
+        /// <summary>
+        /// At least one of the provided HTTP headers represents an invalid HTTP header. Verify the provided HTTP header string and correct it as required.
+        /// </summary>
+        HTTPHeaderInvalid = 1303,
+        /// <summary>
+        /// Too many HTTP response headers are configured. <br/>
+        /// Reduce the number to a supported number of headers. The number is currently capped at 1.
+        /// </summary>
+        TooManyHTTPHeaders = 1304,
+        /// <summary>
+        /// The overall size of all HTTP headers requested to be configured is too large. <br/>
+        /// The user shall either reduce the number of headers or the length of an individual HTTP header.
+        /// </summary>
+        RequestTooLarge = 1305,
+        /// <summary>
+        /// The accessed variable is not a variable of a technology object and cannot be read.
+        /// </summary>
+        NotATechnologyObject = 1400,
+        /// <summary>
         /// The method has not been found by the plc - check the spelling and fw-version (and according methods) of plc
         /// </summary>
         MethodNotFound = -32601,

src/Webserver.API/Enums/ApiFailsafeHardwareType.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiFileResourceState.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiFileResourceType.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiObjectDirectoryStatus.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiPlcDataRepresentation.cs

@@ -0,0 +1,25 @@
+// Copyright (c) 2024, Siemens AG
+//
+// SPDX-License-Identifier: MIT
+
+namespace Siemens.Simatic.S7.Webserver.API.Enums
+{
+    /// <summary>
+    /// Determines the response format for various methods that return data from the PLC.
+    /// </summary>
+    public enum ApiPlcDataRepresentation
+    {
+        /// <summary>
+        /// Should never be the case
+        /// </summary>
+        None = 0,
+        /// <summary>
+        /// "Simple", comfortable format -- represented in a semi-human-readable format.
+        /// </summary>
+        Simple = 1,
+        /// <summary>
+        /// The data is represented in big endian format, formatted as a JSON byte array.
+        /// </summary>
+        Raw = 2
+    }
+}

src/Webserver.API/Enums/ApiPlcHwId.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiPlcModeSelectorState.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;

src/Webserver.API/Enums/ApiPlcOperatingMode.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 
@@ -36,6 +36,22 @@ public enum ApiPlcOperatingMode
         /// <summary>
         /// STOP Firmware-Update
         /// </summary>
-        Stop_fwupdate = 6
+        Stop_fwupdate = 6,
+        /// <summary>
+        /// RH PLCs are in Run-Redundant mode.
+        /// </summary>
+        Run_redundant = 7,
+        /// <summary>
+        /// RH PLCs are in syncup state.
+        /// </summary>
+        Syncup = 8,
+        /// <summary>
+        /// RH PLCs are synchronizing.
+        /// </summary>
+        Run_syncup = 9,
+        /// <summary>
+        /// 
+        /// </summary>
+        Remote_unknown = 10,
     }
 }

src/Webserver.API/Enums/ApiPlcProgramBlockType.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiPlcProgramBrowseMode.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiPlcProgramDataType.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 using Siemens.Simatic.S7.Webserver.API.Models.ApiPlcProgramDataTypes;

src/Webserver.API/Enums/ApiPlcRedundancyId.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2023, Siemens AG
+// Copyright (c) 2024, Siemens AG
 //
 // SPDX-License-Identifier: MIT
 

src/Webserver.API/Enums/ApiPlcRedundancyPairingState.cs

@@ -0,0 +1,53 @@
+// Copyright (c) 2024, Siemens AG
+//
+// SPDX-License-Identifier: MIT
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.Runtime.Serialization;
+
+namespace Siemens.Simatic.S7.Webserver.API.Enums
+{
+    /// <summary>
+    /// The pairing status of the R/H system.
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum ApiPlcRedundancyPairingState
+    {
+        /// <summary>
+        /// Default value if the pairing status could not be retrieved or was 0.
+        /// </summary>
+        [EnumMember(Value = "unknown")]
+        Unknown = 0,
+        /// <summary>
+        /// Redundant connection between both PLCs.
+        /// </summary>
+        [EnumMember(Value = "paired")]
+        Paired = 1,
+        /// <summary>
+        /// Only single pairing via port 1 (or 2) is available.
+        /// </summary>
+        [EnumMember(Value = "paired_single")]
+        Paired_single = 2,
+        /// <summary>
+        /// There are more than 2 R/H PLCs in the network. Cannot determine partner PLC.
+        /// </summary>
+        [EnumMember(Value = "not_paired_too_many_partners")]
+        Not_paired_too_many_partners = 3,
+        /// <summary>
+        /// The partner PLC is not reachable or internal error, represented as unspecified error to the user.
+        /// </summary>
+        [EnumMember(Value = "not_paired")]
+        Not_paired = 4,
+        /// <summary>
+        /// The order IDs of both PLCs of the R/H system do not match.
+        /// </summary>
+        [EnumMember(Value = "not_paired_order_id_mismatch")]
+        Not_paired_order_id_mismatch = 5,
+        /// <summary>
+        /// The firmware versions of both PLCs of the R/H system do not match.
+        /// </summary>
+        [EnumMember(Value = "not_paired_firmware_mismatch")]
+        Not_paired_firmware_mismatch = 6,
+
+    }
+}

src/Webserver.API/Enums/ApiPlcRedundancyRole.cs

@@ -0,0 +1,32 @@
+// Copyright (c) 2024, Siemens AG
+//
+// SPDX-License-Identifier: MIT
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.Runtime.Serialization;
+
+namespace Siemens.Simatic.S7.Webserver.API.Enums
+{
+    /// <summary>
+    /// The role of the represented PLC in the redundant system.
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum ApiPlcRedundancyRole
+    {
+        /// <summary>
+        /// For the tree of the partner PLC, the role may be unknown in case that the partner PLC is not properly paired.
+        /// </summary>
+        [EnumMember(Value = "unknown")]
+        Unknown = 0,
+        /// <summary>
+        /// Primary PLC
+        /// </summary>
+        [EnumMember(Value = "primary")]
+        Primary = 1,
+        /// <summary>
+        /// Backup PLC
+        /// </summary>
+        [EnumMember(Value = "backup")]
+        Backup = 2
+    }
+}