User guide

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3.2 Monitor LED Indications
The operating condition of the interface board and its connection status to Ethernet can be checked
via the four LEDs provided on the front panel of the interface board.
* The LED indications of operating condition and connection condition vary between Modbus/TCP
and EtherNet/IP.
 Modbus/TCP or TCP/IP message communication
LED Color Status Definition Explanation (factor)
Open Modbus/TCP (Remote I/O) TCP/IP Message Communication
- Unlit Not linked
 The system is not connected to Ethernet.
S0
(LINK)
Green Lit Linked
 The system is connected to Ethernet.
- Unlit No packet
 TCP/IP packets are not being transmitted.
S1
(TRX)
Green Lit Packet detected
 TCP/IP packets are being transmitted.
- Unlit No power supply
 Power is not supplied to the board from the X-SEL system.
 Interface board initialization is not complete.
 The interface board is being reset.
 The UTP cable is not connected.
Lit Default IP
operation
 IP address is not specified from the controller during operation. (As a rule, this condition should not
occur.)
Green
Blinking at 1 Hz
Normal operation
 The server has started normally via the controller.
Lit Duplicate IPs
 Duplicate IP addresses were detected on Ethernet.
MS
Red
Blinking Catastrophic
failure
 Module MAC address error (LED blinking at 1 Hz)
 Network definition read error (LED blinking at 2 Hz)
 Other module error (LED blinking at 4 Hz)
- Unlit No Modbus/
TCP connection
 The Modbus/TCP connection has not been
established.
 The LED will not be lit in the case of
TCP/IP message communication.
NS
Green Blinking Modbus/
TCP connection
established
 A Modbus/TCP connection has been established.
(The blinking frequency indicates the number of
connections: 1 Hz  1 connection, 2 Hz 
2 connections.)

 EtherNet/IP
LED Color Status Definition Explanation (factor)
EtherNet/IP
- Unlit Not linked
 The system is not connected to Ethernet.
S0
(LINK)
Green Lit Linked
 The system is connected to Ethernet.
- Unlit No packet
 TCP/IP packets are not being transmitted.
S1
(TRX)
Green Lit Packet detected
 TCP/IP packets are being transmitted.
- Unlit No power supply
 Power is not supplied to the board from the X-SEL system.
 Interface board initialization is not complete.
 The interface board is being reset.
 The UTP cable is not connected.
Lit Normal operation
 The adapter has started normally via control by the controller.
Green
Blinking Not linked
 The network is not yet established or the system is idle.
Lit Catastrophic
failure
 A catastrophic, irreparable failure (module error, etc.) was detected
MS
Red
Blinking Minor failure
 A minor, reparable failure (duplicated IP address, etc.) was detected.
- Unlit No power supply
 Power is not supplied to the board from the X-SEL system.
 IP address is not yet set.
Lit connection
established
 The system is online and connection has been established.
Green
Blinking Connection not
established
 The system is not online and connection has not been established.
Lit Catastrophic
failure
 A duplicated IP address, etc., was detected.
NS
Red
Blinking Connection
timeout
 A connection timeout was detected.
The sections in represent indications during normal operation.