M_GD_XA_3

Generic data.

- obj

 

 

 

 

ASDU object

|---

+ head

 

 

 

Reserved

|---

- ident

 

 

 

DATA UNIT IDENTIFIER

|

|---

eType

= 0xA (10)

= M_GD_XA_3

Type identification

|

|---

bSQ

 

= TRUE

Sequence of information objects

|

|---

nObj

 

= 1

Number of objects

|

|---

eCOT

 

 

Cause of transmission

|

|---

asduAddr

 

 

Common address of asdu

|

|---

eClass

 

 

Fifo priority class

|---

- info

 

 

 

INFORMATION OBJECT

 

|---

fc

 

GEN

Function code/type

 

|---

n

 

 

Information number

 

|---

stream

 

 

Information element/object data

 

 

|---

length

= variable

 

 

 

|---

data

 

7

6

5

4

3

2

1

0

 

 

 

 

|---

data[0] =

RII

Return information identifier

 

 

 

|---

data[1] =

CONT

COUNT

NO

NGD = Number of generic data sets

 

 

 

|---

data[2] =

GROUP

GIN = Generic identification number

Dataset 1

 

 

 

|---

data[3] =

ENTRY

 

 

 

|---

data[4] =

KOD

Kind of description

 

 

 

|---

data[5] =

DATATYPE

GDD = Generic data description

 

 

 

|---

data[6] =

DATASIZE

 

 

 

|---

data[7] =

CONT

NUMBER

 

 

 

|---

data[8..8+(DATASIZE*NUMBER)] =

GID

Generic identification data

 

 

 

|---

data[..IEC870_MAX_ASDU_DATA_BYTE] =

 

 

Dataset 2..i