M_IT_TB_2

Accounting integrated totals, 3 octets each.

- obj

ASDU object

|---

+ head

Reserved

|---

- ident

DATA UNIT IDENTIFIER

|

|---

eType

= 0x3 (3)

= M_IT_TB_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 * ( 5 + [ 1 (signature) ] ) + 5

|---

data

7

6

5

4

3

2

1

0

|---

data[0] =

IOA

Information object address

Information object 1

|---

data[1..3] =

CR3

Counter reading, 3 octets

|---

data[4] =

IV

CA

CY

Sequence

Quality descriptor

|---

data[5] =

Signature

Signature (optional)

|---

data[6..length - 6] =

Information object 2..i

|---

data[length - 5..length - 1] =

CP40Time2a

Five octets binary time tag

|---

data[length..IEC870_MAX_ASDU_DATA_BYTE] =

Reserved