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Communication operation presence/absence and data format types
Data communication between the computer and inverter is made in ASCII code (hexadecimal code).
Communication operation presence/absence and data format types are as follows:
No.
Operation
Communication request is sent to the
1)
inverter in accordance with the user
program in the computer.
2)
Inverter data processing time
Reply data from the
3)
inverter (Data 1) is
checked for error)
4)
Computer processing delay time
Answer from
computer in response
5)
to reply data 3).
(Data 3) is checked
for error)
In the communication request data from the computer to the inverter, 10ms or more is also required after "no data error (ACK)". (Refer to page 229)
Reply from the inverter to the inverter reset request can be selected. (Refer to page 233)
When any of "0.01 to 9998" is set in Pr. 37 and "01" in instruction code, HFF sets data format to A2 or E2. In addition, data format is always A2 and E2
for read or write of Pr. 37.
At mode error, and data range error, C1 data contains an error code. (Refer to page 237) Except for those errors, the error is returned with data format
D.
Data writing format
Communication request data from the computer to the inverter 1)
Format
1
2
3
Inverter
ENQ
A
station
number
Inverter
ENQ
A1
station
number
Inverter
ENQ
A2
station
number
Inverter
ENQ
A3
station
number
Reply data from the inverter to the computer 3) (No data error detected)
Format
1
2
3
Inverter
ACK
C
station
number
Inverter
STX
C1
station
number
Reply data from the inverter to the computer 3) (With data error)
Number of Characters
Format
1
2
3
Inverter
NAK
D
station
number
Indicate a control code
Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
Set waiting time. When the Pr. 123 PU communication waiting time setting is other than "9999", create the communication request data without "waiting time"
in the data format. (The number of characters decreases by 1.)
CR, LF code
When data is transmitted from the computer to the inverter, codes CR (carriage return) and LF (line feed) are automatically set at the end of a data group
on some computers. In this case, setting must also be made on the inverter according to the computer. Whether the CR and LF codes will be present or
absent can be selected using Pr. 124 PU communication CR/LF selection.
Run
Command
A1
Present
No error
C
(Request
accepted)
With error
(Request
D
rejected)
No error
Absent
(No inverter
processing)
With error
(Inverter outputs
Absent
3) again.)
Number of Characters
4
5
6
7
8
Instruction
Data
code
Instruction
Data
code
Instruction
code
Send
Receive
Instruction
data
data
code
type
type
Number of Characters
4
5
6
7
8
Send
Receive
Error
Error
data
data
code 1
code 2
type
type
4
5
Error
code
Communication operation and setting
Operation
Multi
Parameter
Frequency
command
Write
A, A2
A3
A, A2
Present
Present
Present
C
C1
C
D
D
D
10ms or more
Absent
Absent
Absent
(C)
Absent
F
Absent
9
10
11
12
13
Sum
check
Sum
check
Sum
Data
check
Data1
9
10
11
12
13
Data1
Data2
Inverter
Parameter
Monitor
Reset
Read
A
B
B
Present
Present
Present
E, E1, E2,
C
E, E2
E3
D
D
D
Absent
Absent
Absent (C)
(C)
Absent
F
F
14
15
16
17
18
Sum
Data2
check
14
15
16
17
18
ETX
Sum
check
19
19
4
227
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