5 Troubleshooting
5 - 8
CJ-series EtherCAT Slave Units Operation Manual (W541)
B
*1
B
*1
Not
Lit
Lit --- CPU Unit
Fatal Error
A fatal error
occurred in the
CPU Unit.
An emergency
code is sent if
EtherCAT Unit
is in Pre-Oper-
ational state.
--- (n+12)
bit 01
*2
Clear the cause
of the error, and
restart the CPU
Unit.
Not
Lit
Output
OFF Error
An Output OFF
condition occurred
in the CPU Unit.
Clear the cause
of the error.
Lit CPU Unit
Watchdog
Timer
Error
An error occurred
in the CPU Unit.
An emergency
code is sent if
the EtherCAT
Slave Unit is in
Pre-Opera-
tional state and
records the
error in the
error log.
0001 Replace the CPU
Unit.
CPU Unit
Service
Monitor-
ing Error
Servicing from the
CPU Unit was not
completed within
the fixed interval.
The monitoring
time is normally 11
s.
An error occurred
while exchanging
data with the CPU
Unit.
0002 Check and cor-
rect the CPU
Unit’s operating
environment.
I/O
Refresh
Error
The I/O communi-
cation area does
not exist in the
CPU Unit.
This can occur
when the I/O com-
munication area is
set incorrectly,
when the Unit is
mounted to a dif-
ferent CPU Unit
with a different
number of EM
banks or when EM
has been con-
verted to file mem-
ory.
0347 (n+12)
bit 01
*2
(n+12)
bit 07
Check the I/O
communication
area and change
to the correct
allocation and
restart the Ether-
CAT Slave Unit.
I/O Bus
Error
An error occurred
while exchanging
data with the CPU
Unit.
000E --- Check and cor-
rect the CPU
Unit’s operating
environment and
then cycle power
to the PLC.
*1. If the EtherCAT master requests transition to Safe-Operational state or Operational state, the Unit remains in the Pre-Op-
erational state, the ECAT ERR and ECAT RUN indicators are blinking.
*2. If the EtherCAT master requests transition to Safe-Operational state or Operational state, the Unit remains in the Pre-Op-
erational state and the CIO area (n+12) bit 01 is ON.
Indicator
Error Cause Unit operation
Error
log
(hex)
CIO
area
Countermea-
sures
ECAT
RUN
ECAT
ERR
ERC ERH RUN
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