Honeywell 900 User Manual page 66

Main Menu
Diagnostics
Item Status
LEAD I/O
GOOD
COMM DIAG
DATA LINK
FAILURE
HARDWARE
FAILURE
PORT A/B CABLE
MISMATCH
PROTOCOL
MISMATCH
LEAD I/O NO
COMM COMMUNICATIONS
STATUS
MARGINAL: PORT
I/O A
54
Possible Cause Controller Action
Normal operation 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
d) 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 to access the I/O on
wrong ports on the I/O the associated rack
scanner CPU
The firmware version Controller continues
in the controller CPU is to run but is not able
not compatible with the to access the I/O on
firmware version in the the associated rack
I/O scanner
Possible causes are Controller continues
defined by the LEAD to run but is not able
I/O COMM DIAG that to access the I/O on
is being reported. the associated rack
Rack communication Controller continues
with CPU-A is to run but is
experiencing a high marginally
error rate accessing the I/O
on the associated
rack
900 Control Station User Guide
Redundant Overview
Fix
1. Verify that the address
switches on the scanner 2 are
set correctly.
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 Scanner 2.
6. Cycle power to the hub.
7. Cycle power to the C70R.
8. Replace the expansion rack's
scanner module.
9. Replace the expansion rack's
power supply.
10. Replace the expansion rack.
11. Replace the main CPU.
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
Upgrade the firmware in the CPU
and/or scanner to be compatible
versions
See the fix defined for the LEAD
I/O COMM DIAG that is being
reported.
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.
Revision 9
May 2014