IEC15000021 V1 EN-US
Figure 10: Value line of the desired signal
3.
Use the up/down arrows on the LHMI to change the signal value or the appropriate
menu in PCM600.
The status of the signal changes automatically to Forced (i.e. there is no need to set
the status to Forced manually).
On the LHMI, these edit changes have immediate effect. This means that the
value changes directly when the up/down arrow is pressed (i.e. there is no need
to press the Enter key to effectuate the change).
When navigating away from a LHMI forcing menu for an I/O board, the user is prompted to
either leave the signals forced, or to revert all of them back to the unforced state.
IEC15000022 V1 EN-US
It is possible to power-cycle the IED in this state without losing the forcing
states and values. This means that once a signal is forced, and the IED remains
in IED test mode, the input or output will appear “frozen” at the value selected
by the user, even if the IED is switched off and back on again.
Freezing a signal value without changing it
GUID-FD76AAC1-7098-47D3-A3A1-6ACDF509ED91 v1
•
Set the status of a signal to Forced, in the forcing menu that corresponds to the I/O card
in question. See example of LHMI menu in figure
Section 8
1MRK 505 385-UEN C
Testing IED operation
54
Breaker protection REQ650
Commissioning manual
© Copyright 2017 ABB. All rights reserved
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