Operation Principle - ABB Relion Technical Manual

Generator protection

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Operation principle

Automation bits function (AUTOBITS) has 32 individual outputs which each can be

mapped as a Binary Output point in DNP3. The output is operated by a "Object 12" in

DNP3. This object contains parameters for control-code, count, on-time and off-time. To

operate an AUTOBITS output point, send a control-code of latch-On, latch-Off, pulse-

On, pulse-Off, Trip or Close. The remaining parameters will be regarded were

appropriate. ex: pulse-On, on-time=100, off-time=300, count=5 would give 5 positive

100 ms pulses, 300 ms apart.

There is a BLOCK input signal, which will disable the operation of the function, in the

same way the setting Operation: Enabled/Disabled does. That means that, upon activation

of the BLOCK input, all 32 CMDBITxx outputs will be set to 0. The BLOCK acts like an

overriding, the function still receives data from the DNP3 master. Upon deactivation of

BLOCK, all the 32 CMDBITxx outputs will be set by the DNP3 master again,

momentarily. For AUTOBITS , the PSTO input determines the operator place. The

command can be written to the block while in "Remote". If PSTO is in "Local" then no

change is applied to the outputs.

For description of the DNP3 protocol implementation, refer to DNP3 communication

protocol manual.

Function commands for IEC 60870-5-103 I103CMD

Functionality

I103CMD is a command function block in control direction with pre-defined output

signals. The signals are in steady state, not pulsed, and stored in the IED in case of restart.

Function block

IEC10000282-1-en.vsd

IEC10000282 V1 EN

I103CMD function block

1MRK 502 048-UUS A

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