Troubleshooting using the IO Controller indicators
Section 8-2
121
Backplane bus error
/i
Likely cause
The PROFINET lO Controller detected that an error on the backplane bus.
IO Controller Unit response
The Unit will stop processing. Records the error in the error log. (The time
information is set to all zeroes.)
CIO Area Flags allocated to the IO Controller Unit
None of the bits is set.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
Cyclic refresh monitor
timeout
/i
Likely cause
During normal operation the cyclic refresh to the PLC CPU timed out.
IO Controller Unit response
The Unit will stop processing. Records the error in the error log.
CIO Area Flags allocated to the IO Controller Unit
None of the bits is set.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
Watchdog timer error
/i
Likely cause
The PROFINET lO Controller detected a watchdog timer error with the PLC
CPU unit.
IO Controller Unit response
The Unit will stop processing. Records the error in the error log.
CIO Area Flags allocated to the IO Controller Unit
None of the bits is set.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
7-segment
MS indicator
NS indicator
Error log (Hex)
H7
Flashing (red)
OFF
--
7-segment
MS indicator
NS indicator
Error log (Hex)
HE
Flashing (red)
OFF
0001
7-segment
MS indicator
NS indicator
Error log (Hex)
H7
Flashing (red)
OFF
0002
Summary of Contents for CJ1W-CRM21
Page 1: ...CJ1W PNT21 PROFINET IO Controller Unit OPERATION MANUAL Cat No W12E EN 02 ...
Page 2: ......
Page 7: ...vii ...
Page 16: ......
Page 26: ...Basic operating procedure Section 2 4 10 ...
Page 46: ...Installation of Configuration Software Section 3 5 30 ...
Page 76: ...Generic IO Device DTM Section 4 4 60 ...
Page 156: ...140 ...
Page 164: ...146 ...
Page 168: ...150 ...
Page 170: ...Section 152 ...