M_SP_TA_2

Single-point information with time tag.

- obj

 

 

 

 

ASDU object

|---

+ head

 

 

 

Reserved

|---

- ident

 

 

 

DATA UNIT IDENTIFIER

|

|---

eType

= 0x1 (1)

= M_SP_TA_2

Type identification

|

|---

bSQ

 

= FALSE

Sequence of information objects

|

|---

nObj

 

= i

Number of objects

|

|---

bT

 

 

Test

|

|---

bPN

 

 

Positive/negative confirmation/activation

|

|---

eCOT

 

 

Cause of transmission

|

|---

asduAddr

 

 

Common address of asdu

|

|---

eClass

 

 

Fifo priority class

|---

- info

 

 

 

INFORMATION OBJECT

 

|---

rcdAddr

 

 

Record address

 

|---

stream

 

 

Information element/object data

 

 

|---

length

= i * 9

 

 

 

|---

data

 

7

6

5

4

3

2

1

0

 

 

 

 

|---

data[0] =

SPA

Single-point address

Information object 1

 

 

 

|---

data[1] =

SPQ

SPI

SPQ = Single-point qualifier
SPI = Single-point information

 

 

 

|---

data[2..8] =

CP56Time2b

Seven octets binary time tag

 

 

 

|---

data[9..length - 1] =

 

 

Information object 2..i

 

 

 

|---

data[length..IEC870_MAX_ASDU_DATA_BYTE] =

 

Reserved