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64
9-05
Reserved
9-06
Reserved
9-07
RS485 Communications (Response interval)
Factory setting
d 1
Setting range
d0 to d200 (one unit=2ms)
A period of time is needed to switch the host computer from sending state to receiving state. This parameter can set
the delay time to ensure the normal receiving of host computer.
485 BUS
PC or PLC Send
Inverter process time Response delay time Inverter recovery data
Computer control
For RS485 series communications interface, each inverter shall be prepared with individual communications address
in Parameter 9-00, thus computer shall control it based on the individual communications addresses.
Inverter is set to Modbus networks communications, and the following two modes are available:
ASC
Ⅱ
Mode ( American Standard Code for Information Interchange) or RTU Mode ( Remote terminal Unit).
Users can set specific mode and communications agreements in Parameter 9-04.
Code Meaning of Modes:
ASC
Ⅱ
Mode:
Each 8-bit data shall be consisted of two ASC
Ⅱ
characters. For example: a 1-byte data 64H (hexadecimal) shall be
indicated as “64” by ASC
Ⅱ
code, consisting of “6” (36H) and “4” (34H).
Character symbol
‘0’
‘1’
‘2’
‘3’
‘4’
‘5’
‘6’
‘7’
ASC
Ⅱ
code
30H
31H
32H
33H
34H
35H
36H
37H
Character symbol
‘8’
‘9’
‘A’
‘B’
‘C’
‘D’
‘E’
‘F’
ASC
Ⅱ
code
38H
39H
41H
42H
43H
44H
45H
46H
RTU Mode:
Each 8-bit data consists of two 4-bit hexadecimal characters. For example: 64H.
Structure of characters:
11-bit character frame (used for 8-bit character) (explained in following examples)
(8
,
N, 2:parameter 9-04=1 or 6
)
Start
bit
0
1
2
3
4
5
6
7
Stop
bit
Stop
bit
8-data bits
11-bits character frame