Mitsubishi Electric FR-D720S SC EC Instruction Manual page 357

Parameter
● Data writing format
Communication request data from the computer to the inverter
Format
A
A1
A2
A3
Reply data from the inverter to the computer
Format
C
C1
Reply data from the inverter to the computer
Format
D
Indicate a control code (Refer to Tab. 6-53.)
Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
Set waiting time.
When Pr. 123 "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, 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".
FR-D700 SC EC
1 2 3 4 5
Inverter
ENQ Instruction
station
code
number
Inverter
ENQ Instruction
station
code
number
Inverter
ENQ Instruction
station
code
number
Inverter
ENQ Instruction
station
code
number
1 2 3 4 5
Inverter
ACK
station
number
Inverter Recei
Send
ACK
ve
station
data
data
type
number
type
Number of Characters
1 2 3 4 5
Inverter
NAK Error
station
code
number
Number of Characters
6 7 8 9 10
Data
Sum
Data
check
Data
Recei-
Send
ve
Data 1
data
data
type
type
(no data error detected)
Number of Characters
6 7 8 9 10
Error Error
Data 1
code 1 code 2
(data error detected)
Communication operation and settings
11 12 13 14 15 16
Sum
check
Sum
check
Data 2
11 12 13 14 15 16
EXT
Data 2
17 18 19
Sum
check
17 18 19
Sum
check
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