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10-5
Section
Troubleshooting Procedures
174
Error
code
EE-
PROM
Correction
Detailed error code
Meaning
Error
code
EE-
PROM
Correction
2nd byte
1st byte
Meaning
0300
Parameter error; packet
discarded
Commands
Bit 15:
OFF
Bits 08 to 14: SNA
Bits 00 to 07: SA1
Responses
Bit 15:
ON
Bits 08 to 14: DNA
Bits 00 to 07: DA1
Check the command format and
set the correct command data.
---
0601
CPU Bus Unit error
Arbitrary
Restart the CPU Unit. If the
problem persists, replace the
Ethernet Unit.
Saved
0602
CPU Bus Unit memory error
01: Read
error
02: Write
error
06: Error log
Restart the CPU Unit. If the
problem persists, replace the
Ethernet Unit.
Saved
(except
for error
log)
Note
1. The time information in the CPU Unit is used in the CPU Bus Units.
2. If the time information cannot be read from the CPU Unit, the time stamp in
the error log will be all zeros. This can occur due to CPU Unit startup error,
unit number errors, CPU error, and model number errors. If the time is read
out from a Programming Device, the time will be shown as all zeros in the
year 2000.
3. The battery must be installed in the CPU Unit, the power turned ON, and
then the time set before the clock in the CPU Unit can be used. The time will
not be set correctly in the error log unless the clock time is set correctly.
4. An error record is not created in EEPROM when a CPU Bus Unit memory
error occurs.
10-5 Troubleshooting Procedures
The following procedures can be used to troubleshoot various problems in sys-
tem operation.
10-5-1 Startup Problems
Most of the initial steps in these procedures are in question form. Continue in
sequence until a “True” answer tells you to jump to a specified step or until you
are told to perform a specific action that corrects the problem. If performing the
action does not correct the problem, return to the beginning of the procedure and
start over.
1, 2, 3...
1. RUN indicator lit?
True
'
Step 14.
2. ERH indicator lit?
True
'
Step 12.
3. ERC indicator lit?
True
'
Step 9.
4. Power not supplied to CPU Unit?
True
'
Make sure that sufficient power is supplied to the CPU Unit.
5. Ethernet Unit loose on Rack?
True
'
Make sure that Unit is firmly mounted and tighten the mounting
screws firmly.