INTRODUCTION
I-E96-211A
6 - 1
SECTION 6 - TROUBLESHOOTING
INTRODUCTION
This section contains the CPU LED displays, the status words
for communication and non critical errors and the signals on
the IMMFC03 edge connectors.
Table
provides the defined CPU LED displays, what they
mean, and what corrective action(s) to take.
Table 6-1. CPU LED Error Codes
LED (Binary)
8 7 6 5 4 3 2 1
Hex
Meaning
Action
1 1 0 0 0 0 0 0
C0
Primary MFC (normal operation)
None.
0 0 0 0 0 0 0 0
00
Backup MFC configuration is not ini-
tialized.
Check contact 7 (U72). Should be closed.
0 1 0 0 0 0 0 0
40
Backup configuration is okay, how-
ever dynamic data is not
initialized.
Check contact 7 (U72).
1 0 0 0 0 0 0 0
80
The backup module has copied the
primary configuration and is ready.
None.
0 0 0 0 0 0 0 1
01
NVM checksum error.
Reset U72 contact 7 or replace NVM.
0 0 0 0 0 0 1 0
02
Analog input calibration error.
Check IMCIS02 slave switch settings.
Check dipshunt configurations on
NTCS02 T.U. Also, check specifications of
applicable function codes.
0 0 0 0 0 0 1 1
03
Slave status error; wrong type or not
responding.
Check switch settings on slave modules.
Check dipshunt configuration on NIMF01.
Also, check specifications of applicable
function codes.
0 0 0 0 0 1 0 1
05
Configuration error (undefined
block).
Check configuration. Add appropriate
function codes/blocks.
0 0 0 0 0 1 1 0
06
Configuration error (data type error). Check function code specifications in the
configuration. Correct if needed.
0 0 0 0 1 0 1 1
0B
Initialize NVM switch is set.
Reset U72 contacts 6 and 7. Remove and
re-insert the module.
0 0 0 0 1 1 0 0
0C
Nonvolatile memory write in
progress.
Initialize configuration.
0 0 0 0 1 1 0 1
0D
Communication error between pri-
mary and redundant MFCs.
Check the NTMF01 cable between the
primary and secondary MFCs. Also, check
the NKTU01 cable to the termination
module or termination unit.
0 0 0 0 1 1 1 0
0E
Backup MFC ID switch is same as
primary's ID.
Contact 8 of U72 on backup should be
toggled.
0 0 0 0 1 1 1 1
0F
Primary failed; backup configuration
not current.
Reconfigure the primary MFC.