Testing the PCPU-2
If the PCPU-2 is OK:
Reprogram the PCPU. Use SER. 1 to 3 with 9600
baud or SER. 4 with 38400 baud. The ChromLAN
must be called first! Example:
cd \bedi
chromlan a9600 z30
install
Then follow the instructions on the screen.
Then switch off the chromatograph and remove the
PCPU-2
Set DIP switch 8 to OFF
Install PCPU-2
Results:
The PCPU-2 is OK
*
if SER.1 ... 3 report ONLINE with 9600 baud
*
if SER.4 reports ONLINE with 38400 baud
The PCPU-2 is fault
*
if one or more interfaces are OFFLINE
The cable is fault
*
if all interfaces are OFFLINE
*
Switch on the
chromatograph
*
Remove PCPU-2
The PCPU-2 is faulty!
Possibly check power
supply
NO
YES
*
DIP-Switch
SW 1 ... 7 OFF
SW 8 ON
*
Set Station x 16
switch to 0
*
Set Station x 1
switch to 1
*
Fit PCPU-2
*
Switch on the
chromatograph
The PCPU-2 is OK
internally!
Now test the interfaces
*
Connect cable to:
:COM1 or :COM2
of control unit
*
Reset control unit
*
Connect cable to
SER.1 ... 4 of PCPU-2
*
Then type
CD \PCPU-2 [Return]
SCANPGC [Return]
*
Wait until all baud
rates have been tested
*
Then type [F2]
For all 4 PCPU interfaces:
Does
the green lamp
on the PCPU-2
flash ?
SER. 2
SER. 1
SER. 3
SER. 4
DIP
ON
Station x1
Station x16
switch
X6
X7
X 9
X 8
X11
X10
18
Control unit
RS232 / COM1:
9-pin connector
TxD
Signal GND
RxD
2
PCPU-2
Interface SER.2
9-pin connector
GND
3
5
RxD
1
TxD
2
3
Problems and errors
2PROBLEM.CHP, Stand Dezember 22, 1999
19
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