How To Undo Forcing Changes And Return The Ied To Normal Operation; Undo Forcing By Using Testmode Component; Undo Forcing By Using Lhmi; Undo Forcing By Using Pcm600 - Hitachi Relion RES670 Commissioning Manual

Section 10
Testing IED operation
10.8.4 How to undo forcing changes and return the IED to normal
operation
Regardless of which input/output signals have been forced, all forced signals will return to their normal
states immediately when the IED is taken out of test mode.
10.8.4.1

Undo forcing by using TESTMODE component

• If the IED test mode was entered through the test mode function block:
1.
This immediately undoes all forcing, regardless of how it was accomplished and disabled all the way
to force signals.
10.8.4.2

Undo forcing by using LHMI

• If the IED test mode was enabled to using the LHMI:
1.
2.
This immediately undoes all forcing, regardless of how it was accomplished and disabled.
10.8.4.3

Undo forcing by using PCM600

1. Uncheck Forcing Session under the menu IED.
IEC15000031 V1 EN-US
2. Click Yes in the confirmation dialogue box.
PCM600 will revert all forced signals back to unforced and the real signal values will immediately
take effect again.
78
When the forcing is removed by exiting from IED test mode, both input and output
signals may change values. This means that logic input signals may activate functions in
the IED and that output relays may change state, which can be potentially dangerous.
Deactivate the control input on that block.
Set IEDTestMode to Off in the LHMI menu.
Exit from the menu and click Yes in the Save dialogue box.
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Phasor measurement unit RES670
Commissioning manual