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131
Communication functions (Pr. 117 to Pr. 124, Pr. 342)
PARAMETERS
3
2) Reply data from the inverter to the computer during data write
3) Reply data from the inverter to the computer during data read
4) Send data from the computer to the inverter during data read
(4) Data definitions
1) Control codes
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 codes as appropriate. (Refer to
page 213.)
4) Data
Indicates the data such as speed 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 213.)
CAUTION
1. Indicate a control code. (Refer to (4)Data definitions)
2. Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
3. When the Pr. 123 "waiting time setting" setting is other than "9999", create the communication
request data without "waiting time" in the data format. (The number of characters is decremented by
1.)
4. CR, LF code
When data is transmitted from the computer to the inverter, 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 Pr. 124.
Signal Name 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)
*1
Format C
ACK
1234
[No data error detected]
Format D
NAK
123 4
[Data error detected]
Error
code
5
Number of character
s
Number of characters
*4
*1
*4
*2
Inverter
station
number
*2
Inverter
station
number
Format F
[Data error detected]
NAK
123 4
Error
code
5
Format E
STX
Read data Sum check
1234567891011
Format E'
[No data error detected]
ETX
STX
Read data
123456789
ETX
Number of characters
Sum check
*1
*4
*1
*1
*1
*4
*1
*4
*2
Inverter
station
number
*2
Inverter
station
number
*2
Inverter
station
number
*1
STX
*4
123456789
*1
ETX
10 11 12 13
Read data
Sum
check
Format E"
*2
Inverter
station
number
Format HFormat G
ACK NAK
1234
[No data error detected]
123 4
[Data error detected]
Number of characters Number of character
s
*1
*4
*1
*4
*2
Inverter
station
number
*2
Inverter
station
number