5.5 Protection and control blocking examples
All of the relay’s logical nodes are set with Test mode. Test mode is selected through
one common parameter via the HMI path Tests/IED test. By default, Test mode can
only be set locally through LHMI. Test mode is also available via IEC 61850
communication (LD0.LLN0.Mod).
Table 7: Test mode
Test mode Description
Normal mode Normal operation
IED blocked Protection working as in “Normal mode” but control function commands
blocked.
IED test Protection working as in “Normal mode” but protection functions are working
in parallel with test parameters.
IED test and blocked Protection working as in “Normal mode” but protection functions are working
in parallel with test parameters. Control function commands blocked.
The physical outputs from control commands to process are blocked with IED blocked
and IED test and blocked modes. The physical outputs from the protection functions
are not blocked.
The mode of all logical nodes located under CTRL logical device are set with Control
mode. Control mode is selected via the HMI or PCM600 path Configuration/
Control/General. By default, Control mode can only be set locally through
LHMI.Control mode inherits its value from Test mode but Control mode ”On”,
“Blocked” and “Off” can also be independently set. Control mode is also available via
IEC 61850 communication (CTRL.LLN0.Mod).
Table 8: Control mode
Control mode
Description
On Normal operation.
Blocked Control function commands blocked
Off Control functions disabled
The physical outputs from commands to process are blocked with the Blocked mode.
Section 5 1MRS241255 B
Protection and control engineering
66 611 series
Engineering Manual
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