Advantech 5000 Series - Manual (Page 232)

Chapter 7
If the power supply operates normally, you probably have either a
shorted device or a shorted cable. If the power supply does not
operate normally, then test for a module causing the problem by using
the following procedure.
To isolate which module is causing the problem, disconnect the
external power and remove one module at one time till the PWR LED
operates normally. Follow the procedure below:
1. Turn off power to the base.
2. Remove a module from the base.
3. Reapply power to the base.
RUN Indicator
If the self test for the system has passed, the RUN LED is still on
except no power.
7.4 Communication Problems
If you cannot establish communications with the system module,
check these items:
• The cable is disconnected
• The cable has a broken wire or has been wired incorrectly
• The cable is improperly terminated or grounded
• The device connected is not operating at the correct baud rate
• The device connected to the port is sending data incorrectly
• A grounding difference exists between the two devices
• Electrical noise is causing intermittent errors
• The system module has a bad communication port and it should be
replaced
ADAM-5000 7-5