Real Time Automation, Inc.
27
1-800-249-1612
Diagnostics and Troubleshooting
– LEDs
When both LEDs blink Red alternating like railroad crossing lights,
the gateway’s configuration has
changed. A reboot is necessary for the new configuration to take effect.
If the PLC Type of the gateway is configured for I/O Scanner, LED 2 has special meaning. See
Appendix B
for further information.
LED 1 : ASCII
Blink
Green
No messages sent or received.
Solid
Green
All TCP Connections are valid and are communicating
with the gateway within the Inactivity Timeout
configured.
Blink
Red
1)
Data Timeout
–
No data within Inactivity Timeout.
2)
Queue is full and gateway is discarding messages.
Solid
Red
1)
No TCP Devices configured/enabled.
2)
No ASCII Devices configured/enabled.
Off
Ethernet cable is unplugged.
LED 2 : Allen-Bradley PLC
Blink
Green
No messages sent or received.
Solid
Green
Connection to PLC is valid and communication is
good.
Blink
Red
1)
Had good connection to PLC but have since lost it.
2)
No connection has ever been made to the PLC but
IP Address is configured.
Solid
Red
1)
No PLC Configured.
2)
No IP Address entered for PLC.
Off
Ethernet cable is unplugged.
