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REMARKS
*1. Setting any of "0.1" to "999" in Pr. 37 "speed display" and "1" in instruction code "HFF" sets
the data format to A" or E" (6-digit data). Also, the output frequency turns to a speed
display, which is valid in 0.01r/min increments. (The third decimal place is invalid.) If the
instruction code "HFF" is other than "1", the display is in 1r/min increments and a 4-digit
data format can be used. Reply data is given in format E if the requested monitor data has
4 digits, in format E' if the data has 2 digits, or in format E" if the data has 6 digits.
*2. The data format to read/write Pr. 37 "speed display" is always E"/A" (6-digit data).
(3) Data format
Data used is hexadecimal.
Data is automatically transferred in ASCII between the computer and inverter.
Data format types
1) Communication request data from computer to inverter
[Data write]
*1
Format A
ENQ
1
*1
Format A'
ENQ
1
*1
Format A"
ENQ
1
[Data read]
*1
Format B
ENQ
1
2) Reply data from inverter to computer during data write
[No data error detected]
*1
Format C
ACK
1
3) Reply data from inverter to computer during data read
[No data error detected]
*1
Format E
STX
1
*1
Format E'
STX
1
*1
Format E''
STX
1
*2
*3
Instruction
Inverter
Waiting
station
code
time
number
2
3
4
5
6
*2
*3
Instruction
Inverter
Waiting
station
code
time
number
2
3
4
5
6
*2
*3
Instruction
Inverter
Waiting
station
code
time
number
2
3
4
5
6
*2
*3
Instruction
Inverter
Waiting
station
code
time
number
2
3
4
5
6
*2
Inverter
*4
station
number
Number
2
3
4
of
characters
*2
Read
Inverter
station
data
number
2
3
4
5
6
*2
Read
*1
Inverter
station
data
ETX
number
2
3
4
5
6
*2
Read
Inverter
station
data
number
2
3
4
5
6
Sum
Data
check
7
8
9
10 11 12 13
Sum
Data
*4
check
7
8
9
10 11
Data
7
8
9
10 11 12 13 14 15
Sum
*4
check
7
8
9
Number of characters
[Data error detected]
*1
Format D
NAK
1
*1
Sum
*4
check
ETX
7
8
9
10 11
Sum
*4
Number
check
of
characters
7
8
9
*1
Sum
check
ETX
7
8
9
10 11 12 13
133
Communication parameters
*4
Number of
characters
Number of characters
Sum
*4
check
Number
characters
*2
Inverter
Error
*4
station
code
number
Number
2
3
4
5
characters
[Data error detected]
Format F
*2
*1
Inverter
Error
station
code
NAK
number
1
2
3
*4
Number of
characters
of
of
2
*4
4
5
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