CHV180 series frequency inverter special for elevator Communication protocol
.102.
Parameter Description
Address
Meaning of value
R/W
Feature
3009H
Input terminal state
R
300AH
Output terminal state.
R
300BH
Input of AI1
R
300CH
Input of AI2
R
300DH
Torque compensation
R
300EH
Pole position
R
300FH ~
3014H
Reserved
R
3015H
Torque direction
(0:
forward, 1:
reverse)
R
3016H
Device code
R
Parameter lock
password check address
4000H
****
R
Parameter lock
password command
address
4001H
55AAH
R
Fault info address
5000H
This address stores the fault
type of inverter. The meaning of
each value is same as P7.15.
R
The above shows the format of the frame. Now we will introduce the Modbus command
and data structure in details, which is called protocol data unit for simplicity. Also MSB
stands for the most significant byte and LSB stands for the least significant byte for the
same reason. The description below is data format in RTU mode. The length of data unit
in ASCII mode should be doubled.
Protocol data unit format of reading parameters:
Request format:
Protocol data unit
Data length(bytes)
Range
Command
1
0x03
Data Address
2
0~0xFFFF
Read number
2
0x0001~0x0010
Reply format (success):
