OPTO 22 G4LC32ISA-LT, User Manual

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G4LC32ISA-LT User’s Guide A-1
CHAPTER 2 APPENDIX A
TROUBLESHOOTING
Table A-1: G4LC32ISA-LT Troubleshooting Chart
Indication Condition/Problem Action
RUN LED is off. Power not applied to processor
or voltage is too low.
Check power supply connections.
RUN LED flashes after a
power failure occurred during
EEPROM firmware installation.
Kernel is corrupted or processor
has malfunctioned. Remove Boot Loader jumper so that
G4LC32ISA-LT boots to loader. Download flash
kernel, then reinstall Boot Loader jumper.
Run LED is blinking. Controller is malfunctioning. Call Opto 22 Product Support.
TX0 (COM0 transmit) LED
stays off.
Port is not transmitting. Cycle power to unit. Check CTS connection (for
RS-232); must be connected to RTS or disabled
if it is not used. Check jumper settings and/or
OptoControl communication setup.
RX0 (COM0 receive) LED
stays off.
Port is idle. Wire or connection is
bad. Check wiring from the host and
connections at the G4LC32ISA-LT terminals.
Host does not receive a
response from the G4LC32ISA-
LT and RX0 or RX1 (COM0 or
COM1 receive) LED flashes
during program download. Incorrect setup in OptoControl.
PC to G4LC32ISA-LT
connections are incorrect.
Check OptoControl communication setup,
specifically rate, address, and binary/ASCII
settings.
Check wiring connections forcorrect polarity and
wire integrity.
TX1 (COM1 transmit) LED
stays off.
Port is not transmitting. Cycle power to unit. Check CTS connection (for
RS-232); must be connected to RTS or disabled
if it is not used. Check jumper settings and/or
OptoControl communication setup.
RX1 (COM1 receive) LED
stays off.
Port is idle. Wire or connection is
bad. Check wiring for reverse polarity.Check
connections at terminals.
G4LC32ISA-LT controller
cannot transmit to PC. Configuration jumpers were
changed without cycling power.
Wiring to serial port is incorrect.
Cycle power and retry transmission.
Check wiring for reverse polarity.