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Function Block: ModbusChannel

Library: IoDrvModbus

This function block starts the execution of a single configured Modbus channel.

Table 21. Inputs (VAR_INPUT)

Name	Data Type	Initial Value	Description
`Slave`	`ModbusSlaveComPort`
`xExecute`	`BOOL`		Rising edge: The action starts. Falling edge: The outputs are reset when a falling edge occurs before the function block has ended the action. The outputs behave as usual and are reset only if the action is ended or has been aborted (`xAbort`), or if an error has occurred. In this case, the corresponding output values (`xDone`, `xError`, `iError`) exist at the outputs for exactly one cycle.
`xAbort`	`BOOL`		TRUE: The action is aborted immediately and all outputs are set to their initial values.
`iChannelIndex`	`INT`		The channel index to be executed. An invalid index leads to `xError = TRUE` (without Modbus-specific error code).

Table 22. Outputs (VAR_OUTPUT)

Name	Data Type	Initial Value	Description
`xDone`	`BOOL`	`FALSE`	TRUE when a request has been ended successfully
`xBusy`	`BOOL`	`FALSE`	TRUE as long as the request is being processed
`xError`	`BOOL`	`FALSE`	TRUE when a request has been ended with errors
`xAborted`	`BOOL`	`FALSE`	TRUE when the request has been aborted by the user
`ModbusError`	`MB_ErrorCodes`		Current error; defined in the `MB_ErrorCodes` enumeration.

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