Appendix 3 Rs485 Communication Protocol - Chziri ZVF200-M User Manual

Attached Table II: Conventional Symbols Explanation
Figure
NO. NAME
symbol
M
1 AC motor
3
Power meter W
Ammeter or
5 A
Galvanometer
7 Main circuit terminal
9 contactor
11 Thermal relay
13 Reactor
15 Diode
17 switch
19 Non-polar capacitor
21 Triode(type NPN)
23 Discharge tube
25 resistor
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Appendix
Figure
NO. NAME
symbol
2 Frequency meter Hz
4
Signal light
6 voltmeter
V
8 Control loop terminal
10 Circuit breaker
12 Relay coil
Operational
14
amplifier
Electronic
16
optocoupler
18 DC power supply
20
Polar capacitor
22 Triode(type PNP)
24 Piezo-resistor
26 potentiometer

Appendix 3 RS485 Communication Protocol

ZVF200-M Series inverter use the popular MODBUS communicatio n
protocol under RS485 communication control .It must set the inverter
address . communication baud rate. Data format by manual , and these
parameters couldn't be modified .
Modbus communication use two codes : ASCII ( American standard code
for information Interchange ) and RTU ( Remote Terminal Unit). ASCII
data to be transferred will be converted into the corresponding ASCII and
then transmitted, while the RTU data sucked directly, not through the
conversion.
Code Meaning:
ASCII mode:
Each 8-bit data is the combination of two ASCII characters. For example,
0x1F, ASCII shown ad 1F , are made up of
(46Hex) ,The ASCII code 0-9,A-F are as bellows.
Character '0' '1' '2'
ASCII code 30H 31H 32H 33H
Character
'8' '9' 'A'
ASCII code
38H 39H 41H 42H
RTU mode:
Each 8-bit data is the combination of two 4-bit hexadecimal characters.
For example, 0X1F RTU stand for '1FH '
2. Data Format
2.1 10-bit character frame (For 7-bit character):
(7.N.2 : P.92=0)
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Appendix
1 31Hex ,
'3' '4' '5' '6' '7'
34H 35H 36H 37H
'B' 'C' 'D' 'E' 'F'
43H 44H 45H 46H
F