Honeywell HC900 Installation And User Manual page 138

Diagnostics and Troubleshooting - User Interface
Table 27 - Controller Module Diagnostics
OI Screen OI Screen
Item Item Value
XIO PORT GOOD
DLFAIL
128
Number of Possible Cause
LED
Strobes
N/A N/A
6 The communications
to a particular rack is
resulting in a lot of
DLL errors.
HC900 Hybrid Controller Installation and User Guide
Control File Action
N/A
1. Related rack monitor
block's RACK OK pin is
turned off.
2. Depending on the
nature of the DLL
errors, the associated
rack monitor block's
module diagnostics,
and pins could be
affected.
3. Associated rack's COM
Port is set to FAILED.
4. Rack 1 COM Port
diagnostic is set to
FAILED.
User Action
N/A
1. Use the OI or Hybrid
Control Designer
software to
determine which rack
is experiencing the
DLL errors. Verify
that the expansion
rack(C50 CPU only)
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.
Revision 5
9/03