Data Type: RedundancyState

The Redundancy library provides the RedundancyState structure with the components describes below.

By calling GetRedundancyState(ADR(<RedundancyState name>));, the state of the redundancy system is read and stored. As a result, you get programmatic access to the redundancy state and can display it, for example in a visualization.
The redundancy state is also automatically displayed in the Redundancy Configuration editor, on the Redundancy State tab. There in the system graphic in the lower right corner of the respective PLC, the redundancy state is displayed symbolically by circle symbols. Moreover, the state is output as text below in the Redundancy State field. In this way, you can monitor the state of the redundancy system.

The following table compares these two options.

Output text under Redundancy State	`STRUCT RedundancyState`	Description
	`RS_START`	Initial state Tries (when configured correctly) to synchronize with the other PLC If not correctly configured, then the state is set to `RS_SIMULATION_START`.
	`RS_SYNCHRO`	Boot application downloaded, data synchronized, and task started Fieldbus deactivated
Enabled	`RS_CYCLE_ACTIVE`	Works in redundant synchronized mode as active PLC Fieldbus activated
Passive	`RS_CYCLE_STANDBY`	Works in redundant synchronized mode as standby PLC Fieldbus deactivated
Standalone	`RS_CYCLE_STANDALONE`	Works in standalone mode, not synchronized with the other PLC Fieldbus activated
Error	`RS_CYCLE_ERROR`	Fieldbus error, occurred in redundant synchronized mode as active PLC Fieldbus deactivated
Simulation	`RS_SIMULATION`	If not configured Works in standalone mode, not synchronized with the other PLC Fieldbus deactivated
	`RS_BOOTUP_ERROR`	If in state `RS_CYCLE_ACTIVE` The other PLC will become active because the PROFIBUS displays a problem with the active PLC (us). Fieldbus deactivated
	`RS_SHUTDOWN_ACTIVE`	Ends the runtime systems in state `RS_CYCLE_STANDALONE` Tip Leave the fieldbus activated on download.
	`RS_SHUTDOWN_STANDBY`	Ends the runtime systems in state `RS_CYCLE_STANDBY` Tip Deactivate the fieldbus on download.
	`RS_SYNCHRO_ERROR`	Error occurred during the state `RS_SYNCHRO` Fieldbus deactivated
	`RS_SIMULATION_START`	With setting `Simulation=1` Works in standalone mode after the start, not synchronized with the other PLC Fieldbus deactivated Note A synchronization can be triggered later with library functions.
	`RS_NO_LICENCE`	If no license is installed and the demo time has expired No operation
Unknown	No assignment	Indicates that the connection to the PLC is not online

Data Type: RedundancyState

Tip

Tip

Note