Change Lock Chnglck; Application - ABB REB670 Applications Manual

Section 19
Security
19.3
19.3.1
500
• built-in real time clock (in operation/out of order).
• external time synchronization (in operation/out of order).
Events are also generated:
• whenever any setting in the IED is changed.
The internal events are time tagged with a resolution of 1 ms and stored in a list. The
list can store up to 40 events. The list is based on the FIFO principle, that is, when it is
full, the oldest event is overwritten. The list contents cannot be modified, but the whole
list can be cleared using the Reset menu in the LHMI.
The list of internal events provides valuable information, which can be used during
commissioning and fault tracing.
The information can, in addition to be viewed on the built in HMI, also be retrieved
with the aid of a PC with PCM600 installed and by using the Event Monitoring Tool.
The PC can either be connected to the front port, or to the port at the back of the IED.

Change lock CHNGLCK

Application

Change lock function CHNGLCK is used to block further changes to the IED
configuration once the commissioning is complete. The purpose is to make it
impossible to perform inadvertent IED configuration and setting changes.
However, when activated, CHNGLCK will still allow the following actions 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
1MRK 505 370-UUS A
GUID-B48775D0-ACF0-49C6-A7F6-69AF37F1C68F v1
GUID-51EEC9C7-8ECF-4546-BC26-326861654340 v4
Busbar protection REB670 2.2 ANSI
Application manual