FB_BX_COM_64ex
This function block connects ModbusRTU.lib or ComLib.lib with the serial interface of the BX Controller. A PC interface with 64 byte of user data is emulated. Data output is not via a PC interface, but via one of the two serial interfaces of the BX (COM1 or COM2).
VAR_INPUT
pstrEmo_IN :POINTER TO BYTE;
pstrEmo_OUT :POINTER TO BYTE;
ComConfig :ST_COMConfig;
VAR_OUTPUT
ComPortIsClose :BOOL;
bError :BOOL;
iErrorId :INT;
Legend
pstrEmo_IN:
Pointer to ModbusPCComInData
pstrEmo_OUT:
Pointer to ModbusPCComOutData
ComConfig:
Parameterization of the COM interface
COM_Port_Open:
If this bit is set, the interface is opened. If this bit is reset, the interface is closed.
ComPortIsClose:
If the interface is closed, this bit is set.
bError:
There is an error.
iErrorId:
Error code (see FB_COMPortOpen)
Download sample program in ST for linking ModbusRTU and BX: (sample file)
The sample requires the ModbusRTU library!