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Communication operation and setting
Data reading format
Communication request data from the computer to the inverter 1)
Reply data from the inverter to the computer 3) (No data error detected)
Reply data from the inverter to the computer 3) (With data error)
Send data from the computer to the inverter 5)
Format
Number of Characters
1 2 3 4 5 6 7 8 9
B
ENQ
∗1
Inverter
station number
∗2
Instruction code
∗3
Sum
check
∗4
Format
Number of Characters
1 2 3 4 5 6 7 8 9 10 11 12 13
E
STX
∗1
Inverter
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
E1
STX
∗1
Inverter
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
E2
STX
∗1
Inverter
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
Format
Number of Characters
1 2 3 4 to 23 24 25 26 27
E3
STX
∗1
Inverter
station number
∗2
Read data (Inverter type information)
ETX
∗1
Sum
check
∗4
Format
Number of Characters
1 2 3 4 5
D
NAK
∗1
Inverter
station number
∗2
Error
code
∗4
Format
Number of Characters
1 2 3 4
C
(Without
data error)
ACK
∗1
Inverter
station number
∗2
∗4
F
(With data
error)
NAK
∗1
Inverter
station number
∗2
∗4
∗1 Indicate a control code
∗2 Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
∗3 Set waiting time. When the Pr. 123 (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.)
∗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 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 (CR, LF selection).