ModbusChannel (FB)¶

FUNCTION_BLOCK ModbusChannel

Starts the execution of a single configured modbus channel.

InOut:

Scope	Name	Type	Initial	Comment
Inout	slave	ModbusSlaveComPort
Input	xExecute	BOOL		Rising edge: Action start Falling edge: Resets outputs If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or aborted (xAbort), or in the event of an error. In this case, the corresponding output values (xDone, xError, iError) are present at the outputs for exactly one cycle.
	xAbort	BOOL		If this input is TRUE, the action is stopped immediately and all outputs are reset to their initial values.
	iChannelIndex	INT		The Channel Index that shall be executed. An invalid index results in xError = TRUE (without any Modbus specific error code).
Output	xBusy	BOOL		Is TRUE as long as a request is in progress
	xDone	BOOL		Is TRUE if a request finished successfully
	xError	BOOL		Is TRUE if a request finished unsuccessfully
	xAborted	BOOL		Is TRUE after a request in progress has been aborted by “xAbort”
	ModbusError	MB_ErrorCodes	MB_ErrorCodes.UNDEFINED	Specifies the current error as defined in the “MB_ErrorCodes” enumeration