15.4.3 Setting guidelines
There are two possible ways to place the IED in the TestMode= Enabled” state. This
means that if the IED is set to normal operation (TestMode = Disabled), but the functions
are still shown being in the test mode, the input signal INPUT on the TESTMODE
function block must be activated in the configuration.
Forcing of binary output signals is only possible when the IED is in test mode.
15.5 Change lock CHNGLCK
15.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Change lock function CHNGLCK - -
15.5.2 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
The binary input controlling the function is defined in ACT or SMT. The CHNGLCK
function is configured using ACT.
1MRK 511 286-UUS A Section 15
Basic IED functions
331
Application manual
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