M_SP_TA_2

Single-point information with time tag.

- obj

|---

+ 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] =

Single-point address

Information object 1

|---

data[1] =

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

|---

data[2..8] =

Seven octets binary time tag

|---

data[9..length - 1] =

Information object 2..i

|---

data[length..IEC870_MAX_ASDU_DATA_BYTE] =

Reserved