Allen-Bradley DeviceNet 1784-PCIDS, User Manual, Page: 69 / 101

1 Publication 1784-6.5.30 - February 2001
Appendix
A
Diagnostics and Troubleshooting
What This Appendix
Contains
The 1784-PCIDS communication interface card has three LED
diagnostic indicators. The diagnostics provided by these indicators are
described in this appendix.
I/O Status Indicator
The bicolor (green/red) I/O Status LED provides information
concerning the states of inputs and/or outputs.
For information about the See page
I/O Status Indicator A-1
Module (MOD) Status Indicator A-2
Network (NET) Status Indicator A-2
I/O Status Indicator
Condition Status Indicates
off output(s) inactive
input(s) inactive
•
All outputs are inactive.
•
All inputs are inactive.
green output(s) active
input(s) active
•
One or more outputs are active and
under control, and no outputs are
“faulted.”
•
One or more inputs are active and
producing data, and no inputs are
“faulted.”
flashing green
(1)
(1)
The flash rate of the LED is approximately 1 flash per second. The LED should be on for
approximately 0.5 seconds and off for approximately 0.5 seconds.
output(s) idle
•
One or more outputs are idle and no
outputs are active or “faulted.”
flashing red
(1) output(s) faulted
input(s) faulted
•
One or more outputs are “faulted,”
and may be in the fault state.
•
One or more inputs are “faulted,”
and may be in the fault state.
red output(s) forced off
input unrecoverable
fault
•
One or more outputs are forced off
(may be an unrecoverable fault).
•
One or more inputs has an
unrecoverable fault.
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