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Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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3.1.1.1.11<br />

Communication 1<br />

Appendix D: <strong>Practical</strong>s 479<br />

Interpret the following <strong>60870</strong>-5-101 format message, assuming Station address length (2),<br />

Common Address length (1) <strong>and</strong> an Information Object Address length of 3 octets.<br />

68 11 11 68 73 01 00 67 01 06 00 00 00 00 55 69 10 0D 13 01 01 D2 16<br />

How long is the message?<br />

What is the Control Byte?<br />

What is the checksum?<br />

Interpret the Control Byte:<br />

Pri/Sec= FCB= FCV=<br />

What is the Function Code?<br />

What does this mean?<br />

What is the Station Address?<br />

What is the Type Code <strong>and</strong> its meaning?<br />

Interpret the Variable Sequence Qualifier:<br />

What is the Cause of Transmission?<br />

What is the Common Address?<br />

What is the Information Object Address?<br />

Interpret the meaning of the Information :

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