Mitsubishi Electric FR-D720-008 Instruction Manual page 192

Communication operation and setting
Data reading format
Communication request data from the computer to the inverter 1)
Format
1
ENQ
B
∗1
station number
Reply data from the inverter to the computer 3) (No data error detected)
Format
1
STX
E
∗1
station number
STX
E1
∗1
station number
STX
E2
∗1
station number
Format
1
STX
E3
∗1
station number
Reply data from the inverter to the computer 3) (With data error)
Number of Characters
Format
1
NAK
D
∗1
station number
Send data from the computer to the inverter 5)
Number of Characters
Format
1
C
ACK
(Without
∗1
station number
data error)
F
NAK
(With data
∗1
station number
error)
∗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).
188
Number of Characters
2 3 4 5
Inverter
Instruction code
∗2
2 3 4 5
Inverter
∗2
Inverter
Read data
∗2
Inverter
∗2
2 3
Inverter
Read data (Inverter type information)
∗2
2 3 4 5
Inverter Error
∗4
∗2
code
2 3 4
Inverter
∗4
∗2
Inverter
∗4
∗2
6 7 8
Sum
∗3
check
Number of Characters
6 7 8
ETX
Read data
∗1
ETX
Sum
∗1
check
Read data
Number of Characters
4 to 23
9
∗4
9 10 11 12
Sum
∗4
check
∗4
ETX
Sum
∗1
check
24 25 26
ETX
Sum
∗1
check
13
∗4
27
∗4