Forcing By Using Pcm600 - ABB RET670 Commissioning Manual

Section 9
Testing IED operation
Freezing a signal value without changing it
• 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
IEC15000020 V1 EN-US
Figure 13:
The signal "freezes" and will not change value even if, for example, a binary input signal voltage
changes level, or if a binary output is activated as the result of a protection function block
activating.
9.8.3.2

Forcing by using PCM600

In PCM600 the concept is a bit different compared to LHMI. The forcing is accomplished by
entering a forcing session. Within such a session, multiple signals on multiple I/O boards may be
edited and changed at the same time and has no effect on the IED. Once the user is satisfied with
the forcing setup, then all the changes can be effectuated simultaneously towards the IED,
potentially changing inputs and outputs on multiple I/O boards at the same time. It is also
possible to abort this operation (described in step 6 below) and to
1. Right click on the IED in the plant structure and select
2. Click on the
3. Click
IEC15000023 V1 EN-US
4. Click
72
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.
Example of LHMI menu using BIM3
List View tab.
Forcing Session in the menu IED/Start Forcing .
Start editing signal value for forcing on the tool bar.
13
undo all
Signal Monitoring.
1MRK 504 154-UUS B
GUID-FD76AAC1-7098-47D3-A3A1-6ACDF509ED91 v1
GUID-E9D0DAE6-7A86-4FF9-943E-42039015D05B v1
forcing.
Commissioning manual