gefran BDI50 Manuel D'utilisation page 164

Instruction Message
SLAVE
Address
Function Code
High
Start
Address Low
Quantity High
Low
DATA Number *
First
High
DATA
Low
Next
High
DATA
Low
High
CRC-16
Low
* DATA Numbers are the actual number timers 2
RTU Mode
Response Message (Normal)
01H SLAVE Address
10H Function Code
25H
Start
01H Address
00H Quantity
02H
04H
CRC-16
00H
01H
17H
70H
CBH
26H
01H
10H
High 25H
Low 01H
High 00H
Low 02H
High 1BH
Low 04H
App 3-12
Response(Fault)
SLAVE Address
Function Code
Error Code
High
CRC-16
Low
01H
90H
52H
CDH
FDH