Digital Communications Interfaces ________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
7-40
When performing a loopback test, a confirmation window is displayed. The loopback will not be
active until Send Command is selected.
Figure 7-29. Digital Comms Test – Local Loopback Confirmation Message
Are you sure you want to put the T1/El module into local loopback?
This will cause a Minor Alarm on the T1/El module.
Note
. If the module is set to “Loop” timing, the timing setting will need to be
changed to Internal to properly perform the local loopback. Navigate to
Configuration> Comms>Slot #
to change the setting.
Note
: If using Digital Teleprotection over this interface, and the Transmit and
Receive addresses are different, the Digital Teleprotection cord will be in Minor
Alarm during a Local loopback test. Navigate to
Configuration> Digital
Teleprotection
to change the addresses to match to clear this alarm for the Local
loopback test. Take note of the addresses so that they can be changed back after
the Local loopback test is complete