ModbusSlaveComPort (FB)

FUNCTION_BLOCK ModbusSlaveComPort EXTENDS IoDrvModbusBase.ModbusSerialSlaveBase

This block is generated for each serial Modbus slave in the device tree.This function block represents the logical connection to an individual Modbus serial slave. 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).

InOut:

Scope

Name

Type

Initial

Comment

Output

byModbusError

MB_ErrorCodes

MB_ErrorCodes.UNDEFINED

Specifies the current error as defined in the “MB_ErrorCodes” enumeration

iChannelIndex

INT

-1