Function Block: ModbusSlaveComPort

Library: IoDrvModbus

This block is generated for each serial Modbus Server in the device tree. This function block represents the logical connection to an individual Modbus Serial Server. The channels defined for this device are processed in the background. The inputs and outputs of this block provide status information to the user and allow the ability to confirm occurring errors (in order to continue processing).

Table 15. Inputs (VAR_INPUT)

Name	Data Type	Initial Value	Description
`xTrigger`	`Bool`	`FALSE`	Triggers the transmission of all configured Modbus channels for a rising edge
`xReset`	`Bool`	`FALSE`	Restarts communication and resets `xError` and `byModbusError`
`xAcknowledge`	`Bool`	`FALSE`	Restarts communication and does not reset `xError` and `byModbusError`

Table 16. Outputs (VAR_OUTPUT)

Name	Data Type	Initial Value	Description
xInitDone	`Bool`	`FALSE`	All initialization commands were reset.
xError	`Bool`	`FALSE`	`TRUE` if any error occurs. Communication to this server is interrupted.
byModbusError	`MB_ErrorCodes`	`0`	Current errors defined in the `MB_ErrorCodes` enumeration