6 Troubleshooting
6-2-2
Checking Error Status at the EtherNet/IP Port Seven-segment
Display
The seven-segment display alternately displays the built-in EtherNet/IP port node address and the
Built-in EtherNet/IP port
following error codes.
seven-segment display
Normal Operation
MS
Lit green
Errors Related to CPU Unit Data Exchange
MS
Flashing red
Flashing red
Lit red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Flashing red
Errors Related to the CPU Unit
MS
Flashing red
---
Errors Related to the Control Bits
MS
---
6-26
Indications
NS
7-segment
Lit or flashing
Built-in Ether-
green
Net/IP port node
address
Indications
NS
7-segment
Not lit
H1
Not lit
H2
Not lit
H3
Not lit
H4
Not lit
H6
Not lit
H7
---
H8
---
H9
---
HA
Not lit
Hb
---
HC
---
Hd
---
HE
---
HF
Indications
NS
7-segment
---
HH
---
---
Indications
NS
7-segment
---
C6
Error
Normal
Error
Duplicate unit number
CPU Unit faulty
Built-in EtherNet/IP port faulty
Node address setting error
CPU Unit faulty
I/O table not registered
Simple backup function restore error
I/O bus error
CPU Unit memory error
CPU Unit event servicing timeout
Routing table error
I/O refresh error
CPU Unit service monitoring error
CPU Unit watchdog timer error
Error
CPU Unit Fatal Error
Output OFF Error
Error
Multiple Switches ON
CJ2 CPU Unit Hardware User's Manual