- 3 -
LED
Color
Description
Red
(Flashing
only)
A communication error occurred
Modbus TCP Client:
1.
Received an exception code or framing error
(parity error, checksum error)
2.
Command timeout (slave device is not
responding)
3.
TCP connection timeout
Modbus TCP Server:
1.
Received an invalid function code or framing
error (parity error, checksum error)
2.
Accessed invalid register address or coil address
Ethernet/IP Scanner:
1.
Command timeout (the adapter is not
responding)
2.
TCP connection timeout
Ethernet/IP Adapter:
The connection was refused due to incorrect
configuration
Off
No communication
MB*
Green
(Flashing
only)
Modbus is receiving or transmitting data
Red
(Flashing
only)
A communication error occurred
Master Mode:
1.
Received an exception code or framing error
(parity error, checksum error)
2.
Command timeout (the slave device is not
responding)
Slave Mode:
1.
Received an invalid function code or framing
error (parity error, checksum error)
2.
Accessed invalid register address or coil address
Off
No communication
CAN
Green
(Flashing
only)
CANbus(J1939) communication is receiving or
transmitting data
Red
(Steady)
A communication error occurred
1.
The J1939 address claim failed
2.
CAN is in bus-off state because the error counter
is exceeding its limitations
Off
No communication
Eth1,
Eth2
Green Indicates an 100 Mbps Ethernet connection
Amber
Indicates a 10 Mbps Ethernet connection
Off
The Ethernet cable is disconnected
*Only indicates serial communication status; for Modbus TCP status,
please refer to LAN LED indicator.
