12/14 MN05003004Z-EN Demands placed on thefunctionality of thetransparent mode69“SysComWriteControl” functionWith the integrated RS232 interface of the CPU101 the controlcables/lines are not available. Therefore, the“SysComWriteControl” module is not to be used for this interface.The XIOC-SER hardware interface module has control/interfacelines available. This allows the “SysComWriteControl” modulewrite access to the control/interface lines of the COM 2 andCOM 3 interface.Table 21: Parameters of the “SysComWriteControl” functionAutomatic closing of the interfaceThe transparent mode is automatically ended by the operatingsystem with a PLC state change of the XC100 to STOP. Theinterface is reinitialised with the interface parameters last used.Figure 97: Write access to the control/interface lines of the COM 2 or COM 3 interfacedwHandle Return value of the “SysComOpen” functionControl COM 1: Function discontinuedCOM 2, COM 3: TRUE = write command on the control lines/cables of the hardware interfaceSysComReadControl COM 1: Function discontinuedCOM 2, COM 3: Feedback: TRUE = read command was successful; FALSE = read command was not successful
