INFICON Helium Leak Detector Modul1000 Interface description - Manual (Page 27)

Trouble Shooting
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5 Trouble Shooting
5.1 Common
Error Possible Reason Solution
No characters are
received via the interface
/ the Modul1000 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
Wrong interface parameters (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
Modul1000 and PC / PLC match)
Wrong protocol selected in the
Modul1000
Select correct protocol in the Modul1000
PC uses an USB-RS232 converter
In general the Modul1000 will also work with an USB-
RS232-converter. However, these often cause
multiple difficult to track problems (driver, flow control.)
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 Section 2
Serial interface of PC is (still)
occupied with a different program
Check if other programs (e.g. a synchronisation
software for your hand-held computer) 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 Modul1000 replies
with „unreadable“
characters
Wrong interface parameters (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
Modul1000 and PC / PLC match)
Wrong protocol selected in the
Modul1000
Select correct protocol in the Modul1000