RSC documentation

This is a reference of the available documentation regarding the RSC services that are built into the PLCnext Runtime System.

Note: From firmware release 2022.0 LTS on, some RSC services can also communicate via gRPC. The respective protocol buffer definitions (.proto files) can be downloaded from our GitHub repository where you find on all about using gRPC in PLCnext Technology.

Arp.Base

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Base.Acf.Services.ISystemInfoService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	‒	‒	‒	‒	‒

Arp.Device

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Device.Interface.Services.‌‌IDeviceControlService	Topic	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Device.Interface.Services.‌IDeviceInfoService	Topic	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Device.Interface.Services.‌IDeviceSettingsService	Topic	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Device.Interface.Services.‌IDeviceStatusService	Topic	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6

Arp.Hardware

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Hardware.Nim.Services.INetloadLimiterService	Topic	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Hardware.Nim.Services.INetloadLimiterStatisticService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	‒	‒	‒

Arp.Io.Axioline

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Io.Axioline.Services.IAcyclicCommunicationService	Topic	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.Axioline.Services.IAxioMasterService	Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6

Arp.Io.Interbus

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Io.Interbus.Services.IInterbusMasterService	Example	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.Interbus.Services.IPcpService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6

Arp.Io.Profibus

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Io.Profibus.Services.IAcyclicCommunicationService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.6 2022.9	‒	‒
Arp.Io.Profibus.Services.IDiagnosisService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.6 2022.9	‒	‒

Arp.Io.ProfinetStack

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Io.ProfinetStack.Controller.Services.‌IAcyclicCommunicationService	Topic	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IAddressConversionService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IAlarmService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IArConfigurationService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.Io.ProfinetStack.Controller.Services.IArDataService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IArManagementService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IArStatisticService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.Controller.Services.IDiagnosisQueryService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.Io.ProfinetStack.Controller.Services.ITextLookupService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.Io.ProfinetStack.Controller.Services.ITextLookupService2	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.6 2023.9	‒	‒	‒
Arp.Io.ProfinetStack.System.Services.IAcyclicCommunicationService	‒	‒	2026.0 LTS 2026.6	2025.9	‒	‒	‒	‒	‒
Arp.Io.ProfinetStack.System.Services.IConfigurationService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Io.ProfinetStack.System.Services.IDcpService	‒	‒	2026.0 LTS 2026.6	2025.9	‒	‒	‒	‒	‒

Arp.Plc

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Plc.Domain.Services.IPlcConfigService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	‒	‒	‒	‒	‒
Arp.Plc.Domain.Services.IPlcManagerService	Topic	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Domain.Services.IPlcManagerService2	Topic	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Domain.Services.IPlcInfoService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Gds.Services.IDataAccessService	Topic Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Gds.Services.IForceService	Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Gds.Services.ISubscriptionService	Topic Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Meta.Services.IDataTraverserService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Plc.Meta.Services.IVariableBrowseService	Example	‒	2026.0 LTS 2026.6	‒	‒	‒	‒	‒	‒
Arp.Plc.Retain.Services.IRetainManagerService	Topic	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	‒

Arp.Services

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.Services.AppManager.Services.IAppManagerService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	‒	‒	‒	‒	‒
Arp.Services.BackupAndRestore.Services.IBackupAndRestoreService	‒	‒	2026.6	‒	‒	‒	‒	‒	‒
Arp.Services.DataLogger.Services.IDataLoggerService2	Topic Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.6
Arp.Services.NotificationLogger.Services.‌INotificationLoggerService	Topic Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.Services.NotificationLogger.Services.‌‌INotificationLoggerService2	Topic Example	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.Services.SoftwareUpdate.Services. ISoftwareUpdateService	‒	‒	2026.0 LTS 2026.6	‒	‒	‒	‒	‒	‒
Arp.Services.TraceController.Services.‌ITraceControllerService	Example	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6

Arp.System

RSC Service	Context	gRPC	API docs 2026	API docs 2025	API docs 2024	API docs 2023	API docs 2022	API docs 2021	API docs 2020
Arp.System.Commons.Services.Io.IDirectoryService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Commons.Services.Io.IDirectoryService2	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.System.Commons.Services.Io.IFileService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Commons.Services.Io.IFileService2	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	‒	‒
Arp.System.Commons.Services.Io.IFileSystemInfoService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Commons.Services.Security.IDeviceIdentityValidatorService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Lm.Services.ILicenseStatusService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Nm.Services.INotificationManagerService	Topic Example	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.0 LTS 2021.6 2021.9	2020.0 LTS 2020.3 2020.6
Arp.System.Security.Services.IPasswordAuthenticationService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.6 2021.9	‒
Arp.System.Um.Services.IAuthorizationInfoService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.6 2021.9	‒
Arp.System.Um.Services.IPasswordAuthenticationService	‒	.proto	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.6 2021.9	‒
Arp.System.Um.Services.ISessionService	‒	‒	2026.0 LTS 2026.6	2025.0 2025.6 2025.9	2024.0 LTS 2024.6	2023.0 LTS 2023.3 2023.6 2023.9	2022.0 LTS 2022.3 2022.6 2022.9	2021.6 2021.9	‒
Arp.System.Um.Services.IStatusInfoService	‒	‒	2026.0 LTS 2026.6	‒	‒	‒	‒	‒	‒