Changelock Function Chnglck; Introduction; Principle Of Operation - ABB Relion 670 Series Technical Reference Manual

Section 4
Basic IED functions
Table 32: SETGRPS Non group settings (basic)
Name Values (Range)
ActiveSetGrp SettingGroup1
SettingGroup2
SettingGroup3
SettingGroup4
SettingGroup5
SettingGroup6
MAXSETGR 1 - 6
4.5
4.5.1
4.5.2
98
Unit Step
- -
No 1

ChangeLock function CHNGLCK

Introduction

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.

Principle of operation

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
• Clear disturbances
• Reset LEDs
• Reset counters and other runtime component states
• Control operations
• Set system time
• Enter and exit from test mode
• Change of active setting group
The binary input signal LOCK controlling the function is defined in ACT or SMT:
Default Description
SettingGroup1 ActiveSettingGroup
1 Max number of setting groups 1-6
1MRK505222-UUS C
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