Reset Pal To Serial Communication - Thermo Scientific Accela Open Autosampler Hardware Manual

B
PAL Loader
Troubleshooting

Reset PAL to Serial Communication

172 Accela Open Autosampler Hardware Manual
Successful activation of the Loader Mode is indicated by the blinking red LED at the back of
the PAL x axis.
There are two blinking patterns for the LAN and COM (serial) modes for the Control–xt
board only. The LAN mode exhibits a fast, double-blinking signal, whereas the COM (serial)
mode shows a pattern with one blinking signal at a constant time interval. See a visual
representation of the patterns in
Figure 93. LED flashing pattern for LAN and COM modes
Location of LED:
• For PAL Systems, APR CPU or APR Control boards:
LED is beside the DC connector.
• For the PAL-xt System, APR Control-xt board:
LED is between the buzzer and wash station.
If the PAL-xt communication protocol is set to the LAN type, it is possible that the link
between the PAL-xt software and the PAL-xt System can no longer be established. One cause
for such a failure is a corrupt PAL Firmware.
Under these circumstances, you must be able to execute an "emergency" command. This
function is set in the PAL Loader software Setup dialog box using the Reset PAL to Serial
Comm button.
Figure 93.
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