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Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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Fundamentals of IEC <strong>60870</strong>-5 225<br />

Key<br />

EI<br />

BL<br />

SB<br />

NT<br />

IV<br />

Elapsed time invalid<br />

Blocked<br />

Substituted<br />

Not topical<br />

Invalid<br />

SPE<br />

Start events of protection equipment<br />

7 6 5 4 3 2 1 0<br />

SRD SIE SL3 SL2 SL1 GS<br />

Key<br />

GS<br />

SL1<br />

SL2<br />

SL3<br />

SIE<br />

SRD<br />

General start of operation<br />

Start of operation phase L1<br />

Start of operation phase L2<br />

Start of operation phase L3<br />

Start of operation IE (earth current)<br />

Start of operation in reverse direction<br />

OCI<br />

Output circuit information<br />

7 6 5 4 3 2 1 0<br />

CL3 CL2 CL1 GC<br />

Key<br />

GC<br />

CL1<br />

CL2<br />

CL3<br />

General start of operation<br />

Start of operation phase L1<br />

Start of operation phase L2<br />

Start of operation phase L3<br />

QDP<br />

Quality descriptor for events of protection equipment<br />

7 6 5 4 3 2 1 0<br />

IV NT SB BL EI<br />

Key<br />

EI<br />

BL<br />

SB<br />

NT<br />

IV<br />

Elapsed time invalid<br />

Blocked<br />

Substituted<br />

Not topical<br />

Invalid

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