Mitsubishi Electronics FR-S500 instruction manual Data definitions

Communication parameters

4) Send data from computer to inverter during data read

[No data error detected]						[Data error detected]
(May be omitted)
Format G		*1	*2			Format H		*1	*2
			Inverter	*4					Inverter	*4
		ACK	numberstation					NAK	numberstation
					Number
	1		2 3	4			1		2 3 4
					of

characters

Number

of

characters

REMARKS
*1.	Indicates the control code. (Refer to the table below.)
*2.	Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in
	hexadecimal.
*3.	When communication parameter n7 "waiting time setting" ≠ - - -, create the communication
	request data without "waiting time" in the data format.
	(The number of characters is decremented by 1.)
*4.	CR or LF code
	When data is transmitted from the computer to the inverter, codes 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.
	Also, the presence or absence of the CR and LF codes can be selected using n11.
(4)	Data definitions
1) Control codes

Signal	ASCII Code	Description
STX	H02	Start of Text (Start of data)
ETX	H03	End of Text (End of data)
ENQ	H05	Enquiry (Communication request)
ACK	H06	Acknowledge (No data error detected)
LF	H0A	Line Feed
CR	H0D	Carriage Return
NAK	H15	Negative Acknowledge (Data error detected)

2)Inverter station number

Specify the station number of the inverter which communicates with the computer.

3)Instruction code

Specify the processing request, e.g. operation or monitoring, given by the computer to the inverter. Hence, the inverter can be run and monitored in various ways by specifying the instruction code as appropriate. (Refer to page 180.)

4)Data

Indicates the data such as frequency and parameters transferred to and from the inverter. The definitions and ranges of set data are determined in accordance with the instruction codes. (Refer to page 180.)

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