Structure of the Request message

00

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

CTT2 service

SPA protocol

00

01

02

03

00

01

02

03

04

05

06

07

08

09

10

11

Code

Index

Read length

Write length

Com

SPA
TID

Index
Low

Index
High

Sub
index

Offset
Low

Offset
High

Res

LSB
LO

LSB
HI

MSB
LO

MSB
HI

Data Exchange
Request

SPA

12 bytes

12 bytes

Read

8312.5

0

0

0x1D

0x03

0x0C

0x0C

0x01

0x00Any value in the range 0x00 – 0xFF which is specified by the user.

0x78

0x20

0x05

0x00

0x00

0x00

0x00

0x00

0x00

0x00