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Demands placed on the
functionality of the
transparent mode
69
“SysComWriteControl” function
With the integrated RS232 interface of the CPU101 the control
cables/lines are not available. Therefore, the
“SysComWriteControl” module is not to be used for this interface.
The XIOC-SER hardware interface module has control/interface
lines available. This allows the “SysComWriteControl” module
write access to the control/interface lines of the COM 2 and
COM 3 interface.
Table 21: Parameters of the “SysComWriteControl” function
Automatic closing of the interface
The transparent mode is automatically ended by the operating
system with a PLC state change of the XC100 to STOP. The
interface is reinitialised with the interface parameters last used.
Figure 97: Write access to the control/interface lines of the COM 2 or COM 3 interface
dwHandle
Return value of the “SysComOpen” function
Control
COM 1:
Function discontinued
COM 2, COM 3:
TRUE = write command on the control lines/cables of the hardware interface
SysComReadControl
COM 1:
Function discontinued
COM 2, COM 3:
Feedback: TRUE = read command was successful; FALSE = read command was not successful
Summary of Contents for XC-CPU101 Series
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