Honeywell 900 User Manual page 67

Redundant Overview
Item Status
MARGINAL: PORT
I/O B
GOOD: PORT I/O A
GOOD: PORT I/O B
NOT USED IN THIS
CONFIGURATION
RESERVE I/O GOOD
COMM DIAG
DATA LINK
FAILURE
HARDWARE
FAILURE
PORT A/B CABLE
MISMATCH
Revision 9
May 2014
Possible Cause Controller Action
Rack communication Controller continues
with CPU-B is to run but is
experiencing a high marginally
error rate accessing the I/O
on the associated
rack
Normal operation N/A
Normal operation N/A
None of the I/O
N/A
modules contained in
this rack are being
used to execute the
control configuration
that is currently running
in the controller.
N/A N/A
• Scanner2 address
Controller continues
switches are not in to run but is not able
the correct position to access the I/O on
• An I/O cable is the associated rack
unplugged.
• Cables are defective
or are not properly
shielded
• If a hub is used, it
may be powered
down.
• The Scanner2 is
powered down.
• The Scanner2 is
defective
The I/O interface has a Controller continues
hardware failure. to run but is not able
to access any I/O.
The I/O cables from Controller continues
CPUA and CPUB are to run but is not able
connected to the wrong to access the I/O on
ports on the I/O the associated rack
scanner CPU
900 Control Station User Guide
Main Menu
Diagnostics
Fix
1. Check cable shielding for
proper grounding and noise
immunity.
2. Check connectors of all
cables.
3. If a hub/switch is being used,
verify that it is one that is
recommended by Honeywell
4. Replace cables
N/A
N/A
N/A
N/A
1. If LEAD I/O COMM DIAG is
also "DATA LINK FAILURE",
follow the Fix defined for that
diagnostic.
2. If a hub is used, check that all
cables are properly connected
to the hub, proper crossover
cables are used, that the hub
is powered, and it supports
100 Base-T.
3. Check cable shielding for
proper grounding and noise
immunity.
4. Make sure the cables have the
correct pin out.
5. Cycle power to the hub.
6. Cycle power to the C70R.
7. Replace the main CPU.
8. Cycle power to the Scanner 2.
9. Replace the expansion rack's
scanner module.
10. Replace the expansion rack's
power supply.
11.Replace the expansion
rack.
Replace the CPU.
Swap the cables so that I/O A is
connected to I/O on CPUA and
I/O B is connected to I/O on
CPUB
55