Mitsubishi Electronics FR-S500 Data format, Reply data from inverter to computer during data read

Communication parameters

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]

Format A

Format A'

Format A"

[Data read]

Format B

	*1		*2	Instruction		*3						Sum
		Inverter				Waiting		Data							*4
	ENQ	numberstation			code							check
						time											Number of
1		2	3	4	5	6	7	8	9	10		11	12		13
																	characters
	*1		*2	Instruction		*3	Data		Sum			*4
		Inverter				Waiting
	ENQ	numberstation			code	time			check
1		2	3	4	5	6	7	8	9	10		11		Number of characters
	*1		*2	Instruction		*3									Sum
		Inverter				Waiting			Data									*4
	ENQ	numberstation			code	time									check					Number
1		2	3	4	5	6	7	8	9	10		11	12		13	14		15		of
																			characters
	*1		*2	Instruction		*3	Sum
		Inverter				Waiting			*4
	ENQ	numberstation			code	time	check
1		2	3	4	5	6	7	8	9		Number of characters

2) Reply data from inverter to computer during data write

[No data error detected]

[Data error detected]

*1

*2

*1

*2

Format C

Inverter

*4

Format D

Inverter

Error

*4

numberstation

numberstation

ACK

NAK

code

Number

Number

1 2 3 4

1 2 3 4 5

of

of

characters

characters

3) Reply data from inverter to computer during data read

[No data error detected]

[Data error detected]

*1

*2

Read

*1

Sum

Format E

Inverter

*4

STX

station

data

ETX

check

number

Format F

1

2

3

4

5

6

7

8

9

10

11

*1

*2

Read

*1

Sum

*1

*2

Error

Format E'

Inverter

*4

Number

Inverter

*4

STX

station

data

ETX

check

NAK

station

code

number

of

number

1

2

3

4

5

6

7

8

9

characters

1

2 3

4 5

*1

*2

Read

*1

Sum

Format E''

Inverter

*4

STX

station

data

ETX

check

number

Number of

1

2

3

4

5

6

7

8

9

10

11

12

13

characters

2

FUNCTIONS

135