CARLO GAVAZZI VariFlex3 RVLF Series - Page 155

Motor Controllers AC Variable Frequency Drives Type VariFlex
3
RVLF
Specications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network. 13/12/2017 151
ASCII Mode
RTU Mode
Instruction Message
Instruction Message
Response Message (Normal)
Response Message (Normal)
Response (Fault)
Response (Fault)
SLAVE Address 01H
Function Code 08H
Test Code
High 00H
Low 00H
DATA
High A5H
Low 37H
CRC-16
High DAH
Low 8DH
SLAVE Address 01H
Function Code 88H
Error Code 20H
CRC-16
High 47H
Low D8H
The function code checks communication between MASTER and SLAVE, the instruction
message is returned as a response message without being changed, any values can be used
for test codes or data.
4.4 LOOP BACK testing [08H]
3AH STX
30H
SLAVE
Address
31H
30H
Function
Code
38H
30H
Test Code
30H
30H
30H
41H
DATA
35H
33H
37H
31H
LCR CHECK
42H
0DH
END
0AH
3AH STX
30H
SLAVE
Address
31H
30H
Function
Code
38H
30H
Test Code
30H
30H
30H
41H
DATA
35H
33H
37H
31H
LCR CHECK
42H
0DH
END
0AH
3AH STX
30H
SLAVE
Address
31H
38H
Function
Code
38H
32H
Error Code
30H
37H
LCR CHECK
35H
0DH
END
0AH
SLAVE Address 01H
Function Code 08H
Test
Code
High 00H
Low 00H
DATA
High A5H
Low 37H
CRC-16
High DAH
Low 8DH