logical one to the CHNGLCK input. If such a situation would occur in spite of these
precautions, then please contact the local ABB representative for remedial action.
17.5.3
Function block
CHNGLCK
LOCK*
ACTIVE
OVERRIDE
IEC09000062-1-en.vsd
IEC09000062 V1 EN
Figure 353:
CHNGLCK function block
17.5.4
Signals
Table 587:
CHNGLCK Input signals
Name
Type
Default
Description
LOCK
BOOLEAN
0
Activate change lock
Table 588:
CHNGLCK Output signals
Name
Type
Description
ACTIVE
BOOLEAN
Change lock active
OVERRIDE
BOOLEAN
Change lock override
17.5.5
Settings
The function does not have any parameters available in Local HMI or Protection and
Control IED Manager (PCM600)
17.5.6
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:
•
Monitoring
•
Reading events
•
Resetting events
•
Reading disturbance data
1MRK 506 335-UUS A
Section 17
Basic IED functions
761
Technical manual
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