Eaton XC-CPU101 Series, Instruction Leaflet

Page: 86 / 96

RS232 interface in transparent
mode (COM 1/2/3)
12/14 MN05003004Z-EN
68
“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.
Table 20: Parameters of the “SysComReadContro” function
Figure 96: Read 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 = read command on the control lines/cables of the hardware interface
SysComReadControl COM 1: Function discontinued
COM 2, COM 3: TRUE = read command was successful; FALSE = read command was not successful