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Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

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

Types 2, 30 Single-point with time<br />

INFORMATION OBJECT TYPE: 2, 30<br />

CODE:<br />

M_SP_TA_1, M_SP_TB_1<br />

DESCRIPTION:<br />

Single-point information with time tag<br />

VALID WITH SQ: 0<br />

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

Information Object Address<br />

IV NT SB BL SPI SIQ<br />

CP24Time2a or CP56Time2a<br />

Three or seven-octet binary time<br />

Valid cause of transmission codes<br />

Spontaneous<br />

Requested<br />

Return of information caused by remote comm<strong>and</strong><br />

Return of information caused by local comm<strong>and</strong><br />

Notes<br />

SIQ – Single-point information with quality descriptor<br />

Type 2 has three-octet time. Type 30 has seven-octet time

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