Table 13 Expansion Rack Communication Status - Honeywell 900 User Manual

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Communications
Status Possible Cause
GOOD Comm port is functioning
properly or comm port is
not used
DATA LINK The communications to a
FAILURE particular rack is resulting
in a lot of communication
errors.
HARDWARE The power-up test of the
FAILURE expansion rack Ethernet
controller failed.
30

Table 13 Expansion Rack Communication Status

Controller Action
N/A
1. Related rack monitor
block's RACK OK pin is
turned off.
2. Depending on the nature of
the communication errors, the
associated rack monitor
block's module diagnostics,
and pins could be affected.
3. Associated rack's
COMPORT DIAGNOSTIC is
set to FAILED.
4. Rack 1 COMPORT
DIAGNOSTIC is set to
FAILED.
1. All rack monitor block XIO
PORT DIAG are set to
HWFAIL and COMPORT
DIAGNOSTIC is set to FAIL.
2. All rack monitor block
RACK OK pins are turned off.
3. All modules in the
configuration have their
diagnostic set to
MOD_NOCOMM, their rack
monitor module fail pin is
turned on., and the rack
monitor block's RACK OK pin
is turned off.
4. SYSTEM MONITOR
block's HW OK pin is turned
off.
5. The statuses for the AO, AI,
DI, DO channels that are
affected are set to
BAD_CHANNEL.
900 Control Station User Guide
Expansion Rack Communications
What to do
N/A
1. Use the OI to determine which
rack is experiencing the comm
errors. Verify that the expansion
rack should be in the
configuration
2. Verify that the jumpers on the
scanner are setup for the correct
rack address.
3. If a hub is used, check that all
cables are properly connected to
the hub, proper crossover cables
are used, and that hub is
powered.
4. Cycle power to the rack.
5. Cycle power to the hub.
6. Replace the expansion rack's
power supply.
7. Replace the expansion rack.
8. Replace the expansion rack's
scanner board.
9. Replace the main CPU.
Replace main-CPU module
Revision 9
May 2014