MITSUBISHI ELECTRIC FR-S520 - Manual (Page 130)

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2
REMARKS
* 1. Setting any of "0.1" to "999" in Pr. 37 "speed display" and "1" in data 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 data 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Format A
Format A'
Format A"
[Data write]
[Data read]
Format B
Number of
characters
Number of characters
*3
ENQ
Inverter
station
number
Instruction
code
Wa
iti
n
g
tim
e
Data *4
Number
of
characters
Sum
check
Number of characters
1 2 3 4 5 6 7 8 9 10 11
*3
ENQ
Inverter
station
number
Instruction
code
Wai
ting
tim
e Data *4
Sum
check
1 2 3 4 5 6 7 8 9 10 11 12 13
*3
ENQ
Inverter
station
number
Instruction
code
Wa
iti
n
g
tim
e
Data *4
Sum
check
*5
1 2 3 4 5 6 7 8 9
*3
ENQ
Inverter
station
number
Instruction
code
Wai
ting
tim
e *4
Sum
check
*5
2) Reply data from inverter to computer during data write
Error
code
Inverter
station
number
*3
ACK
*4
Number
of
characters
Format C
Inverter
station
number
Number
of
characters
*3
NAK
*4 Format D
[No data error detected] [Data error detected]
1 2 3 4 1 2 3 4 5
3) Reply data from inverter to computer during data read
Format E''
Format E'
*3
ETX
Number
of
characters
Format F
*3
STX
[Data error detected] [No data error detected]
Read
data
Number of
characters
1 2 3 4 5 6 7 8 9 10 11 12 13
Inverter
station
number
*4
Sum
check
Format E
*3
STX
*3
ETX
Read
data
1 2 3 4 5 6 7 8 9 10 11
Inverter
station
number
*4
Sum
check
Error
code
Inverter
station
number
*3
NAK
*4
1 2 3 4 5
*3
STX
*3
ETX
Read
data
1 2 3 4 5 6 7 8 9
Inverter
station
number
*4
Sum
check