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8 RS232 interface in transparent mode (COM 1/2/3)
The transparent mode serves data exchange with data terminals
(e.g. terminals, printers, PCs, measurement devices etc.) via the
RS232 serial interface connection. The data transfer is transparent;
i.e. the data is transferred without it being interpreted further.
This functionality is provided on the XC100 by the
“XC100_SysLibCom” library. The library must be integrated into
the “Library Manager”. The library contains functions for opening
and closing the interface, for sending and receiving data and for
setting the interface parameters and control cables.
If control lines of the integrated XC100 interfaces on the RS232
are contacted in the function module, they will not function as the
control lines do not physically exist. However, these
“XC100_SysLibCom functions” are implemented for reasons of
compatibility.
With the XIOC-SER hardware interface module, the control lines
are available and are operated via the “SysComReadControl” and
“SysComWriteControl” function calls.
If transparent mode is active, no communication is possible with
the programming system. Transparent mode must first be
disabled. When Transparent mode is closed, the original
communication parameters are reinitialised. The transparent
mode is forcibly deactivated when the PLC changes to the STOP
mode.
A prerequisite for operating the RS232 interface in transparent
mode is hardware version 02 and operating system version V02.00
or higher.
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