XS series operating manual
XS user manual v0.55 - 131 -
Trouble shooting the RS232 interface
When the RS232C interface is not operating as described in this manual, please check the
following points:
No reaction from the XS unit when sending commands :
o The cable between the XS unit and the PC computer must be correctly connected at both
ends. The cable is a special wiring cable : check that the cable is a Sefelec CO179 model or
check that the wiring has been done according to the instructions .
o The XS series units have several possible interface types : check that in the SETUP menu
<page2>, the RS232 mode has been selected on the INTERFACE line.
o The end of message must be the LF (hexa 0A,decimal 10) character. If this character is not
sent, the XS unit won’t handle the message : check that this character is added to the
command.
o The first command must be the REM command, which displays the REMLOC message on
the LCD display, the unit being ready to receive all the others commands.
o WARNING : the first REM command should not wait for the Xon character before being sent.
The unit goes in REMOTE mode and then hang up :
Before sending a new command, it is mandatory to wait that the XS unit indicates its non busy
state by sending the Xon character (hexa 11,decimal 17). If a code arrives during the handle of
the previous one, it can produce an erratic operating mode of the unit or stop it.
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