Diagnostics
103
Diagnostics
LED indications
The RETA-02 module is equipped with three diagnostic LEDs. The
description of the LEDs in Modbus/TCP is presented below.
Name Colour Function
Link/Activity
Green
Off - Module cannot detect a link
Flashing green - Module is receiving/transmitting
on Ethernet
Steady green - Module has detected a link
Network Status
Red/
Green
Off - No power or IP address
Flashing green - Waiting for connections
Steady green - At least one Modbus/TCP
connection is open against the module
Flashing red - Connection timed out. No message
has been received within configured time
Steady red - Duplicate IP address
Module Status
Red/
Green
Steady green - Normal operation
Flashing red - Minor fault (e.g. communication
with application lost but recoverable)
Steady red - Major fault (e.g. bad flash, failed
memory test, non-recoverable communication
problem with host)
Network Status
(not used) Link/Activity
Module Status
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