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Troubleshooting Procedures Section 10-5
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 CS/CJ-series 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
system 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 proce-
dure 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?
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 prob-
lem 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 prob-
lem persists, replace the Ethernet
Unit.
Saved
(except
for error
log)
Error
code
Meaning Detailed error code Correction EE-
PROM
1st byte 2nd byte