ADLINK ND-6520 - Manual (Page 93)

Troubleshooting and Maintenance • 89
Troubleshooting and
Maintenance
Preventive Maintain
z Periodic check for loose connection
ATTENTION: To avoid electircal shock or unintended operation of the
module, remove incoming power before checking connections.
Using the LED Indication
The LED provides status information on Modules operation. The
troubleshooting about shows LED indicator. It also shows how to use the LED to
detect and correct common operating problems.
LED What it Means: What to do:
OFF Module is not receiving input
power by loosing wiring. Check module wiring,
cable connections, and
cable connections on
terminal block.
ON(RED) Normal receiving state. No action required.
Flashing Normal transmitting state. No action required.
Other Malfunctions
Problem What it Means: What to do:
Do not
function Loose wiring
Incorrect DIP switch setting Check wiring and cable
connection
Check Baudrate and data
packet setting of the DIP
switch.