LACO PROTOCOL DESCRIPTIONS TITANTEST™
143
© 2018 LACO TECHNOLOGIES, INC. - TitanTest itra01en1-07 SB.fm - 1807
14.Trouble Shooting
14.1 Serial communication via RS232 (common)**
** Feature not available in TITANTEST™ Maintenance model
Error Possible Reason Solution
No characters are received
via the interface/the leak de-
tector does not answer
Wrong cable Please use a 1:1 cable, (NO null-modem cable, also
called cross-over cable!)
Problems with flow control Deactivate flow control in PC/PLC or use cable
according to the wiring diagram in Section 2
Wrong COM-Port used at
PC
Select correct COM-Port
No characters are received
via the interface/the leak de-
tector does not answer
Wrong interface parame-
ters (Baud rate, Data bits,
Parity, Stop bits)
Check if interface parameters (Baud rate, number of
data bits, parity bit and number of stop bits in the
leak detector and PC/PLC match)
Wrong protocol selected in
the leak detector
Select correct protocol in the leak detector
PC uses an USB-RS232 con-
verter
In general the IO1000 will also work with an
USBRS232- converter. However, these often cause
multiple difficult to track problems (driver, flow con-
trol.) Please test your PC program on a “real” RS232
interface first preferably. Especially with USB-RS232-
converters it is often helpful to use a cable according
to the wiring diagram in chapter 4 of the IO1000
documentation.
Serial interface of PC is (still)
occupied with a different
program
Check if other programs uses the serial interface. It is
also possible that an already closed program has not
released the interface again yet. In this case a restart
of the PC will help.
The leak detector replies
with “unreadable? charac-
ters
Wrong interface parame-
ters (Baud rate, Data bits,
Parity, Stop bits)
Check if interface parameters (Baud rate, number of
data bits, parity bit and number of stop bits in the
IO1000 and PC/PLC match)
Wrong protocol selected in
the leak detector
Select correct protocol in the leak detector
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