Checking Local Hmi Connectivity - ABB RELION REX640 Operation Manual

Troubleshooting
6.1.5

Checking local HMI connectivity

If the connection between the LHMI and the relay is lost, check the following.
1.
2.
88
WHMI is disabled by default. It can be enabled by the
HMI mode parameter via Configuration > HMI. Reboot the
relay for the change to take effect.
Check that the RJ-45 cable is properly connected between the LHMI's main unit
port X1.1. and the X0 port (HMI) of the relay's communication card. If the station
communication connection (a LAN port of the communication card) is used
between the LHMI and the relay, see
relay through station network
Check that the LHMI is paired with the relay. See
HMI with relay
.
Chapter 7.4.3.2 Connecting local HMI to a
to check the proper connection.
Chapter 7.4.3.4 Pairing local
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