C_GRC_NA_3

General command.

- obj

ASDU object

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+ head

Reserved

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- ident

DATA UNIT IDENTIFIER

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eType

= 0x14 (20)

= C_GRC_NA_3

Type identification

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bSQ

= TRUE

Sequence of information objects

|

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nObj

= 1

Number of objects

|

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eCOT

Cause of transmission

|

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asduAddr

Common address of asdu

|

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eClass

Fifo priority class

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- info

INFORMATION OBJECT

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fc

:= GLB

Function code/type

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n

Information number

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stream

Information element/object data

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length

= 2

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data

7

6

5

4

3

2

1

0

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data[0] =

DCS

DCO = Double command

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data[1] =

RII

Return information identifier

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data[2..IEC870_MAX_ASDU_DATA_BYTE] =

Reserved