ABB Relion 670 series - Page 1238

20.6 ChangeLock function CHNGLCK
GUID-E8A1C33A-DD65-42B5-BA13-CFAE40C2C9AD v2
20.6.1 Functionality
GUID-00784FC0-B39D-462D-854B-AAF62626DD0A v3
Change lock function CHNGLCK is used to block further changes to the IED configuration and
settings once the commissioning is complete. The purpose is to block inadvertent IED
configuration changes beyond a certain point in time.
The change lock function activation is normally connected to a binary input.
20.6.2 Function block
GUID-15AA1D42-912E-4085-8166-33FDC327CEB5 v2
IEC09000946.vsd
CHNGLCK
LOCK* ACTIVE
OVERRIDE
IEC09000946 V2 EN-US
Figure 625: CHNGLCK function block
20.6.3 Signals
GUID-1B253577-C81B-40E3-B406-1F6586DCE545 v2
PID-3786-INPUTSIGNALS v4
Table 952: CHNGLCK Input signals
Name Type Default Description
LOCK BOOLEAN 0 Activate change lock
PID-3786-OUTPUTSIGNALS v4
Table 953: CHNGLCK Output signals
Name Type Description
ACTIVE BOOLEAN Change lock active
OVERRIDE BOOLEAN Change lock override
20.6.4 Operation principle
GUID-74581AA2-6EB4-4CFA-92DA-90FB89F9A62C v3
The Change lock function (CHNGLCK) is configured using ACT.
The function, when activated, will still allow the following changes of the IED state that does not
involve reconfiguring of the IED:
Section 20 1MRK 502 066-UUS B
Security
1232
Technical manual