ABB RELION 670 Series Technical Manual page 1238

Section 20
Security
20.6 ChangeLock function CHNGLCK
20.6.1 Functionality
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
LOCK*
IEC09000946 V2 EN-US
Figure 625: CHNGLCK function block
20.6.3 Signals
Table 952: CHNGLCK Input signals
Name
LOCK
Table 953: CHNGLCK Output signals
Name
ACTIVE
OVERRIDE
20.6.4 Operation principle
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:
1232
CHNGLCK
ACTIVE
OVERRIDE
IEC09000946.vsd
Type Default
BOOLEAN 0
Type
BOOLEAN
BOOLEAN
Description
Activate change lock
Description
Change lock active
Change lock override
1MRK 502 066-UUS B
GUID-E8A1C33A-DD65-42B5-BA13-CFAE40C2C9AD v2
GUID-00784FC0-B39D-462D-854B-AAF62626DD0A v3
GUID-15AA1D42-912E-4085-8166-33FDC327CEB5 v2
GUID-1B253577-C81B-40E3-B406-1F6586DCE545 v2
PID-3786-INPUTSIGNALS v4
PID-3786-OUTPUTSIGNALS v4
GUID-74581AA2-6EB4-4CFA-92DA-90FB89F9A62C v3
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