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Introduction
3)  Indicators of the remote communication expansion module
 
■
EtherCAT slave station
LED Indicator Meaning Solution
O O
Data is exchanged between the EtherCAT 
master station and the EtherCAT slave 
station.
The preset conguration and actual 
conguration match.
None
O Blinking
No data is exchanged between the 
EtherCAT master station and the 
EtherCAT slave station.
Check the conguration and parameter 
settings.
Check the communication address.
Check whether the cable length and baud rate 
match.
Check the terminal resistance setting.
O On
There is no connection between the 
EtherCAT master station and the 
EtherCAT slave station.
Check whether the bus connector is properly 
inserted.
Check whether the bus cable to the EtherCAT 
master station has defects.
Restart the power supply.
On Blinking
The preset conguration is inconsistent 
with the actual conguration
,
 and there 
is no data exchange between the master 
station and the slave station.
Check the EtherCAT address and slave 
conguration. Check if any slave module is in 
fault or is not properly congured.
On O
The communication address is not 
allowed.
Set a valid communication address in the range 
of 1 to 125.
 
■
CANopen slave station
LED Indicator Status Meaning of CANRUN (Green)   Meaning of CANERR (Red)
O - No error
On
The CAN bus is running 
normally.
The CAN bus is not connected.
Blinking Pre-operation state Pre-operation state
Blinking once The CAN bus is in STOP state.
At least one error counter of the CAN controller has reached 
or exceeded the threshold (too many error frames).
Blinking twice -
An error control event (node monitoring or heartbeat event) 
occurs.
Blinking three times - Communication with the synchronization object times out.
 
■
Probus-DP slave station
LED Indicator
Meaning Solution
RUN 
(green)
SF (red) BF (red)
On O O
Module communication and 
conguration running are normal.
-
O O O
The module has no power
,
 or the 
slave station hardware is abnormal.
Check whether the the module power supply 
is normal.
Replace the AM600-RTU-DP module.
O O On
Probus-DP communication with the 
master station is interrupted.
Check the communication cable connection.
Check the bus conguration.
O O Blinking
Communication is interrupted due 
to a conguration error
,
 parameter 
address error
,
 or hardware fault.
Check the conguration and parameter 
settings.
Check whether the address is correct.
Check the hardware or cable terminal 
resistance.