Download XC100 Modular PLC

10/10 MN05003004Z-EN
RS232 interface in transparent
mode (COM 1/2/3)
“SysComReadControl” function
With the onboard RS232 interface of the CPU101 the control
cables/lines are not available. Therefore, the
“SysComReadControl” module is not to be used for this interface.
The XIOC-SER hardware interface module has control/interface
lines available. This allows the “SysComReadControl” module
read access to the control/interface lines of the COM 2 and COM 3
interface.
Figure 96: Read access to the control/interface lines of the COM 2 or COM 3 interface
Table 20: Parameters of the “SysComReadContro” function
dwHandle
Return value of the “SysComOpen” function
Control
COM 1:
Function discontinued
COM 2, COM 3:
TRUE = read command on the control lines/cables of the hardware interface
COM 1:
Function discontinued
COM 2, COM 3:
TRUE = read command was successful; FALSE = read command was not successful
SysComReadControl
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