Main Menu
Controller Diagnostics Diagnostics
Revision 9 900 Control Station User Guide 41
May 2014
Item Status Possible Cause Controller Action What to do
Data Link Failure The communications
to a particular rack is
resulting in a lot of
DLL errors.
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.
1. Use the OI to determine which rack
is experiencing the DLL 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 HC900-C50 expansion
rack’s power supply.
7. Replace the HC900-C50 expansion
rack.
8. Replace the HC900-C50 expansion
rack’s scanner board.
9. Replace the main CPU.
Hardware Failure The power-up test of
the expansion rack
Ethernet controller
failed.
1. All rack monitor block
XIO PORT DIAG are set
to HWFAIL.
2. All rack monitor block
RACK OK pin 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. ASYS block’s HW OK
pin is turned off.
5. The statuses for the AO
and AI channels that are
affected are set to
BAD_CHANNEL.
Replace main-CPU module
Port A/B Cable
Mismatch
C70R only. The I/O
cables from CPUA
and CPUB are
connected to the
wrong ports on the
I/O scanner CPU
Controller continues to run
but is not able to access
the I/O on the associated
rack
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
To Next Page
Loading...
