User`s manual

Troubleshooting and Maintenance • 89
Troubleshooting and
Maintenance
Preventive Maintain
l Periodically check for loose connections.
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 module operation.
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 baud rate and data
packet setting of the DIP
switch.