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Communication operation and setting
Data reading format
Communication request data from the computer to the inverter 1)
Format
1
2
ENQ
B
station number
Reply data from the inverter to the computer 3) (No data error detected)
Format
1
2
STX
E
station number
STX
E1
station number
STX
E2
station number
Format
1
2
STX
E3
station number
Reply data from the inverter to the computer 3) (With data error)
Number of Characters
Format
1
2
NAK
D
station number
Send data from the computer to the inverter 5)
Number of Characters
Format
1
2
C
ACK
(Without
station number
data error)
F
NAK
(With data
station number
error)
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.
228
Number of Characters
3
4
5
Inverter
Instruction code
3
4
5
Inverter
Read data
Inverter
Read data
Inverter
3
Inverter
Read data (Inverter model information)
3
4
5
Inverter
Error
code
3
4
Inverter
Inverter
6
7
8
Sum
check
Number of Characters
6
7
8
ETX
ETX
Sum
check
Read data
Number of Characters
4 to 23
9
9
10
11
12
Sum
check
ETX
Sum
check
24
25
26
ETX
Sum
check
13
27
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