ABB Relion 650 Series Technical Manual page 562

Section 16
Basic IED functions
16.6.2 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.
When CHNGLCK has a logical one on its input, then all attempts to modify the IED configuration
and setting will be denied and the message "Error: Changes blocked" will be displayed on the local
HMI; in PCM600 the message will be "Operation denied by active ChangeLock". The CHNGLCK
function should be configured so that it is controlled by a signal from a binary input card. This
guarantees that by setting that signal to a logical zero, CHNGLCK is deactivated. If any logic is
included in the signal path to the CHNGLCK input, that logic must be designed so that it cannot
permanently issue a logical one on the CHNGLCK input. If such a situation would occur in spite of
these precautions, then please contact the local ABB representative for remedial action.
16.6.3 Function block
LOCK*
IEC09000062 V1 EN-US
Figure 291: CHNGLCK function block
16.6.4 Signals
Table 510: CHNGLCK Input signals
Name
LOCK
Table 511: CHNGLCK Output signals
Name
ACTIVE
OVERRIDE
16.6.5 Settings
The function does not have any parameters available in Local HMI or Protection and Control IED
Manager (PCM600)
16.6.6 Operation principle
The Change lock function (CHNGLCK) is configured using ACT.
556
CHNGLCK
ACTIVE
OVERRIDE
IEC09000062-1-en.vsd
Type Default
BOOLEAN 0
Type
BOOLEAN
BOOLEAN
© Copyright 2011 ABB Power Grids. All rights reserved
Description
Activate change lock
Description
Change lock active
Change lock override
1MRK 506 326-UUS B
GUID-00784FC0-B39D-462D-854B-AAF62626DD0A v1
GUID-8C333BC0-AA7A-4ED1-A772-18C22E8EEE62 v3
GUID-15AA1D42-912E-4085-8166-33FDC327CEB5 v2
PID-1645-INPUTSIGNALS v5
PID-1645-OUTPUTSIGNALS v5
GUID-7BD56E56-4301-470E-A0D1-535376F2D66A v1
GUID-74581AA2-6EB4-4CFA-92DA-90FB89F9A62C v2
Line distance protection REL650
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