GUID-C2262ADD-640C-4F59-B584-BE03A1C43F95 V1 EN
Figure 81:
Relay self-supervision status on local HMI
On the WHMI, the self-supervision status is available under Device menu. The top
right LED indicates the relay status.
GUID-C1CB83B9-C8C1-4FBC-AD6A-664E7684ACE4 V1 EN
Figure 82:
Relay self-supervision status on Web HMI
In addition, the last boot reason and time are shown on both LHMI and WHMI.
6.2.1
Internal faults
When an internal relay fault is detected, relay protection operation is disabled and the
self-supervision output contact is activated. In the main unit, the main indication of an
internal fault is a flashing green Ready LED behind the power module, and on the
HMI, a rapidly flashing red Home button.
Different actions are taken depending on the severity of the fault. The protection relay
tries to eliminate the fault by restarting. In case of a permanent fault, the protection
relay stays in the internal fault mode. All other output contacts are released and locked
1MRS759118 A
Section 6
Troubleshooting
REX640
85
Operation Manual
