5 Troubleshooting
5 - 18
CJ-series EtherCAT Slave Units Operation Manual (W541)
5-5 Troubleshooting with AL Status
This status reports errors related to EtherCAT communications.
The following table lists the AL status codes that are used with the EtherCAT Slave Units.
AL status
code (hex)
Status name Contents
Notifica-
tion to
EtherCAT
master
Corrective action
0011 Illegal State Tran-
sition Request
Received
An incorrect state transition request
was received.
Possible Change the status correctly.
0012 Error State Transi-
tion Received
An unclear state transition request
was received.
0014 SII Unit Verification
Error
The non-volatile memory for SII back-
ups does not match the information in
the SII (VendorID, ProductCode,
RevisionNo, and Serial No.).
Cycle the power supply.
If the error still occurs, replace the EtherCAT
Slave Unit.
0016 Mailbox Setting
Error
An incorrect mailbox setting was
detected for the Sync Manager.
Correct the settings and then download them to
the EtherCAT master again.
001B Process Data
WDT Error
A timeout was detected for an I/O
data send frame.
Review the following items, and restart the slave
based on the specifications of the connected
EtherCAT master.
• Wire the EtherCAT communications cable cor-
rectly.
• Check to see if the EtherCAT communications
cable is exposed to excessive noise.
001D RxPDO Setting
Error
A mismatch occurred between the
RxPDO setting size from the Ether-
CAT master and the OUT data area
size setting in the EtherCAT Slave
Unit.
Correct the OUT data area size to match the
EtherCAT master RxPDO setting and then turn
OFF the error bit of AL status from the EtherCAT
master.
001E TxPDO Setting
Error
A mismatch occurred between the
TxPDO setting size from the Ether-
CAT master and the IN data area size
setting in the EtherCAT Slave Unit.
Correct the IN data area size to match the Ether-
CAT master TxPDO setting and then turn OFF
the error bit of AL status from the EtherCAT mas-
ter.
0024 TxPDO Mapping
Error
The TxPDO and RxPDO are not
assigned after the Unit receives a
request to change from Pre-Opera-
tional state to Safe Operational state.
Correct the communication area input and output
data size to match the EtherCAT master TxPDO
and RxPDO settings and then turn OFF the error
bit of AL status from the EtherCAT master.
8000 Slave Restarted The Unit was restarted.
The voltage is present in the Unit
immediately after power is turned
OFF. The power is turned ON in this
state.
Turn OFF the error bit of AL status from the
EtherCAT master.
8004 Errors Related to
the CPU Unit
An error was detected in the CPU
Unit.
The AL status code is caused by one
of the following errors.
• CPU Unit Fatal Error
• CPU Unit Watchdog Timer Error
• CPU Unit Service Monitoring Error
• I/O Refresh Error
• I/O Bus Error
Refer to 5-2-1 Checking for Errors and Trouble-
shooting with the Indicators on page 5-5 for error
corrective actions.
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