Mitsubishi Electric FR-A700 Instruction Manual page 630

Communication operation and setting
● Communication request data from the computer to the inverter
Format
(Data write)
(Data write)
(Data read)
● Reply data from the inverter to the computer when data is written
Format
(No data error
detected)
(Data error
detected)
● Reply data from the inverter to the computer when data is read
Format
(No data error
detected)
(No data error
detected)
(Data error
detected)
● Send data from the computer to the inverter during data read
Format
(No data error
detected)
(Data error
detected)
Indicate a control code (Refer to Tab. 6-135.)
Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
When Pr. 123, Pr. 337 "Waiting time setting" ≠ 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, CR (carriage return) and LF
(line feed) codes 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 or Pr. 341
"CR, LF presence/absence selection".
6 - 450
1 2
Inverter
A
ENQ station
number
Inverter
A'
ENQ station
number
Inverter
B
ENQ station
number
Number of Characters
1 2
C Inverter
ACK station
number
D Inverter
NAK station
number
1 2
E Inverter
STX station
number
E' Inverter
STX station
number
D Inverter
NAK station
number
Number of Characters
1 2
C Inverter
ACK station
number
F Inverter
NAK station
number
Number of Characters
3 4 5 6
Waiting
Instruction
code
time
Waiting
Instruction
code
time
Waiting
Instruction
Sum check
code
time
3 4 5
Error
code
Number of Characters
3 4 5 6
Read data
Read data ETX Sum check
Error
code
3 4
7 8 9 10
Data Sum check
Data Sum check
7 8 9 10
ETX Sum check
Parameter
11 12 13
11