Service Mode

Three sources for switching requests and value specifications are available for the services:

Manual operation (e.g. via OPC UA): Operator
Internal PLC logic: Automatic-Internal
Control system (e.g. via OPC UA): Automatic-External

Operation mode control

The operation mode control allows you to switch between the states Offline, Operator, and Automatic.

In the Offline state, no new switching requests or value specifications are taken into account. In the Operator state, *OP switching requests and *OP setpoints are processed; in the Automatic state, *Aut switching requests and *Aut value specifications from the selected source are processed.

The current state is displayed via the outputs StateOffAct, StateOpAct, and StateAutAct.

The state change is carried out via the internal PLC logic or via the operators. The input StateChannel is set via the internal PLC logic and specifies which source is taken into account during processing.

If more than one state change is requested at the same time (e.g., StateOpAut = TRUE and StateOffAut = TRUE), the requests are discarded and Operation Mode remains in its current state.

Source selection (Automatic)

The source selection is used in the Automatic operation mode and allows you to switch between Automatic-Internal and Automatic-External.

Automatic-Internal switching requests and value specifications are written by the internal PLC logic. The variable names are extended by the suffix *Int.

Automatic-External Switching requests and value specifications are written manually (e.g. via OPC UA).

Operator switching requests are made manually (e.g. via OPC UA). They are declared as external variables and cannot be written via the internal PLC logic. Operator switching requests, add the suffix *Op to the variable name.

If both state changes are requested simultaneously (e.g., SourceManAut = TRUE and SourceIntAut = TRUE), the requests are discarded and Source Mode remains in its current state.

	`Service Mode` is part of interfaces and cannot be used alone!

Diagram of the state machines:

The state machines work according to the following diagram:

Inputs

Name	Type	Description	OPC UA access
StateChannel	BOOL	Selection of switching requests for the operation mode of the state machine: 1: `Automatic` switching requests are taken into account. 0: `Operator` switching requests are taken into account.	Read
StateOffAut	BOOL	`Automatic` Switching request to switch the `Service Mode` to the `Offline` operation mode.	Read
StateOpAut	BOOL	`Automatic` Switching request to switch the `Service Mode` to the `Operator` operation mode.	Read
StateAutAut	BOOL	`Automatic` Switching request to switch the `Service Mode` to the `Automatic` operation mode	Read
SrcChannel	BOOL	Selection of switching requests for the source of the state machine: 1: `Automatic` switching requests are taken into account. 0: `Operator` switching requests are taken into account.	Read
SrcIntAut	BOOL	`Automatic` Switching request to select `Internal` as the source for the `Automatic` operation mode of the `Service Mode`.	Read
SrcManAut	BOOL	`Automatic` Switching request to select `Manual` as the source for the `Automatic` operation mode of the `Service Mode`.	Read

Outputs

Name	Type	Description	OPC UA access
StateOffAct	BOOL	1: Current operation mode is `Offline.`	Read
StateOpAct	BOOL	1: Current operation mode is `Operator.`	Read
StateAutAct	BOOL	1: Current operation mode is `Automatic.`	Read
SrcIntAct	BOOL	1: The current source is `Internal` and the current operation mode is `Automatic.`	Read
SrcManAct	BOOL	1: The current source is `Manual` and the current operation mode is `Automatic.`	Read

External variables

Name	Type	Description	OPC UA access
StateOffOp	BOOL	`Operator` Switching request to switch the `Service Mode` to the `Offline` operation mode. 0→1: `Operator` request 1→0: Request has been processed.	Read/write
StateOpOp	BOOL	`Operator` Switching request to switch the `Service Mode` to the `Operator` operation mode. 0→1: `Operator` request 1→0: Request has been processed.	Read/write
StateAutOp	BOOL	`Operator` Switching request to switch the `Service Mode` to the `Automatic` operation mode. 0→1: `Operator` request 1→0: Request has been processed.	Read/write
SrcIntOp	BOOL	`Operator` Switching request to select `Internal` as the source for `Service Mode`. 0→1: `Operator` request 1→0: Request has been processed.	Read/write
SrcManOp	BOOL	`Operator` Switching request to select `Manual` as the source for `Service Mode`. 0→1: `Operator` request 1→0: Request has been processed.	Read/write

Methods

Name	Type	Description
IsOffline	BOOL	Returns `TRUE` if the current operation mode is `Offline`.
IsOperator	BOOL	Returns `TRUE` if the current operation mode is `Operator`.
IsAutomaticInternal	BOOL	Returns `TRUE` if the current operation mode is `Automatic` and the current source is `Internal`.
IsAutomaticExternal	BOOL	Returns `TRUE` if the current operation mode is `Automatic` and the current source is `External`.
SetOffline	BOOL	Sets the `Service Mode`'s operation mode to the state `Offline.` Returns `TRUE` if the current operation mode is `Offline`.
SetOperator	BOOL	Sets the `Service Mode`'s operation mode to the state `Operator.` Returns `TRUE` if the current operation mode is `Operator`.
SetAutomaticInternal	BOOL	Sets the `Service Mode`'s operation state to `Automatic` and selects the source `Internal` from`.` Returns `TRUE` if the current operation mode is `Automatic` and the current source is `Internal`.
SetAutomaticExternal	BOOL	Sets the `Service Mode`'s operation state to `Automatic` and selects the source `External` from`.` Returns `TRUE` if the current operation mode is `Automatic` and the current source is `External`.