(3) Read [Slave address 1, Device identification information: Product code (model number)]
• A request message from the master
3.5 idle
characters
Slave
address
(01H)
Function
code
(2BH)
Sub-function
code
(0EH)
Data
(0401H)
Error check
CRC-16
(B2E7H)
3.5 idle
characters
1 1 1 2 2
• Response message from the slave in normal status (AKT4R1111001)
3.5 idle
characters
Slave
address
(01H)
Function
code
(2BH)
Sub-function
code
(0EH)
1 1 1
Data
(0481000001010C414B54345231313131303031H)
Error check
CRC-16
(8870H)
3.5 idle
characters
19 2
Data in the response message becomes the following.
Data Read Device ID code 1 byte 04H
Conformity level
1 byte
81H
More Follows
1 byte
00H
Next Object ID
1 byte
00H
Number of Objects
1 byte
01H
List of Object ID
1 byte
01H
List of Object length
1 byte
12 (0CH)
List of Object value Object length A (41H)
K (4BH)
T (54H)
4 (34H)
R (52H)
1 (31H)
1 (31H)
1 (31H)
1 (31H)
0 (30H)
0 (30H)
1 (31H)
• Response message from the slave in exception (error) status [when Sub-function code (MEI type)
is not correct]
The function code MSB is set to 1 for the response message in exception (error) status, and ABH
is returned.
Exception code 01H (Non-existent function) is returned (error).
3.5 idle
characters
Slave
address
(01H)
Function
code
(ABH)
Exception code
(01H)
Error check
CRC-16
(9EF0H)
3.5 idle
characters
1 1 1 2
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