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Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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264 <strong>Practical</strong> Modern <strong>SCADA</strong> Protocols: DNP3, <strong>60870</strong>.5 <strong>and</strong> <strong>Related</strong> <strong>Systems</strong><br />

Type 50 Set-point comm<strong>and</strong>, short FP number<br />

INFORMATION OBJECT TYPE: 50<br />

CODE:<br />

C_SE_NC_1<br />

DESCRIPTION:<br />

Set-point comm<strong>and</strong>, short floating point<br />

number<br />

VALID WITH SQ: 0<br />

Information Object for SQ = 0 (Sequence of Information Objects)<br />

Single information object only.<br />

Information Object Address<br />

Ex<br />

S<br />

S/E<br />

Fraction<br />

Fraction<br />

Fraction<br />

Exponent<br />

QL<br />

IEEE STD 754 Short Floating Point<br />

Number<br />

QOS – Qualifier of set-point comm<strong>and</strong><br />

Valid cause of transmission codes<br />

In control direction<br />

Activation<br />

Deactivation<br />

In monitor direction<br />

Activation confirmation<br />

Deactivation confirmation<br />

Activation termination<br />

Unknown type identification<br />

Unknown cause of transmission<br />

Unknown common address of ASDU<br />

Unknown information object address<br />

Notes<br />

IEEE STD 754 – Short floating-point number<br />

QOS – Qualifier of set-point comm<strong>and</strong>

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