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• Communication operation presence/absence and data format types are as follows.
Symbol
Operation
Communication request is sent to
a
the inverter in accordance with the
user program in the computer.
b
Inverter data processing time
Reply data from the
c
inverter (Data (a) is
checked for an error.)
d
Computer processing delay time
Reply from computer
in response to reply
e
data c
(Data c is checked for
error.)
*1
In the communication request data from the computer to the inverter, 10 ms or more is also required after "no data error (ACK)". (Refer to
174.)
*2
Reply from the inverter to the inverter reset request can be selected. (Refer to
*3
At mode error and data range error, C1 data contains an error code. Except for those errors, the error is returned with data format D.
• Data writing format
a. Communication request data from the computer to the inverter
Format
1
2
3
Inverter
ENQ
Instruction
station
A
*1
code
*2
number
Inverter
ENQ
Instruction
station
A1
*1
code
*2
number
Inverter
ENQ
Instruction
station
A2
*1
code
*2
number
c. Reply data from the inverter to the computer (No data error detected)
Format
1
2
3
Inverter
ACK
station
C
*4
*1
*2
number
Inverter
Send
STX
station
C1
data
*1
*2
type
number
c. Reply data from the inverter to the computer (Data error detected)
Format
1
*1
D
NAK
*1
Indicates a control code.
*2
Specifies the inverter station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal.
*3
When Pr.123 (time delay setting) ≠ 9999, create a communication request data without time delay in the data format. (The number of characters
decreases by 1.)
*4
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 be also 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 or Pr.341 (CR/LF selection).
• Data reading format
Operation
Operation
command
frequency
A, A1
A
With
With
*1
No error
C
C
(Request
accepted)
With error
(Request
D
D
rejected)
10 ms or more
*1
No error
Without
Without
(No inverter
processing)
With error
(Inverter
Without
Without
outputs c
again.)
Number of characters
4
5
6
7
8
*3
Data
*3
Data
Send
Receiv
*3
data
e data
type
type
Number of characters
4
5
6
7
Receiv
Error
Error
e data
code 1
code 2
type
Number of characters
2
3
Error
*2
Inverter station number
code
Multi
Parameter
command
write
A2
A
With
With
*3
C
C1
D
D
Without
Without
(C)
F
Without
page
179.)
9
10
11
12
13
Sum
*4
check
Sum
*4
check
Data 1
Data 2
8
9
10
11
12
13
Data 1
Data 2
4
5
*4
5.11 (N) Communication operation parameters
Inverter
Parameter
Monitor
reset
read
A
B
B
Without
With
With
E, E1,
*2
E
C
E2, E3
*2
D
D
D
Without
Without
Without (C)
(C)
Without
F
F
14
15
16
17
18
Sum
check
14
15
16
17
18
ETX
Sum
*1
check
5. PARAMETERS
2
2
3
4
5
6
page
7
8
19
9
10
*4
19
*4
171
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