LED Indicators
LED Color Description
PWR 1,
PWR 2
Green Power is on
Off Power is off
Ready Green Steady on: Power is on, and the unit is functioning normally
Blinking: The unit is responding to the software’s Locate function
Red Steady on: Power is on, and the unit is booting up
properly
Flashing quickly: the microSD card failed
LAN Green
(Flashing only)
The Ethernet port is receiving or transmitting data
Modbus TCP Client: Modbus communication in progress
Modbus TCP Server: Modbus communication in progress
EtherNet/IP Adapter: EtherNet/IP communication is exchanging data
PROFINET IO Device: PROFINET communication is exchanging data
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 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
PBS Green
(Flashing only)
PROFIBUS is receiving or transmitting data
Red
(Steady)
An error in the Configuration or parameter data
Off PROFIBUS is offline or the slave ID is wrong.
Eth1, Eth2 Green Indicates an 100 Mbps Ethernet connection
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