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Mitsubishi Electric FR-F700PJ Instruction Manual Page 234

Air-conditioning inverter.
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(4)
Data definitions
1) Control code
Signal
ASCII Code
STX
H02
ETX
H03
ENQ
H05
ACK
H06
LF
H0A
CR
H0D
NAK
H15
2) Inverter station number
Specify the station number of the inverter which communicates with the computer.
3) Instruction code
Specify the processing request, for example, 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 64)
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 64)
5) Waiting time
Specify the waiting time between the receipt of data at the inverter from the computer and the transmission of reply data.
Set the waiting time in accordance with the response time of the computer between 0 and 150ms in 10ms increments.
(example: 1 = 10ms, 2 = 20ms).
Computer
Inverter
Inverter
Computer
REMARKS
 When the Pr. 123 PU communication waiting time setting setting is other than "9999", create the communication request data
without "waiting time" in the data format. (The number of characters decreases by 1.)
 The data check time changes depending on the instruction code. (Refer to page 230)
6) Sum check code
Sum check code is 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum (binary) derived from
the checked ASCII data.
(Example 1)
Computer
ASCII Code
When the Pr. 123 Waiting time setting
data without "waiting time" in the data format. (The number of characters decreases by 1.)
(Example 2)
Inverter
ASCII Code
Start of Text (Start of data)
End of Text (End of data)
Enquiry (Communication request)
Acknowledge (No data error detected)
Line Feed
Carriage Return
Negative Acknowledge (Data error detected)
Station
Instruction
ENQ
Inverter
number
0
1
E
H05
H30 H31
H45 H31
H30+H31+H45+H31+H31+H30+H37+H41+H44
=H1F4
Sum
=
"9999", create the communication request
Station
STX
Computer
number
0
1
1
H02
H30 H31
H31 H37
H30+H31+H31+H37+H37+H30
= H130
Sum
Communication operation and setting
Description
Inverter data processing time
= Waiting time
(Setting 10ms)
Data
code
1
1
0
7
A
D
H31
H30 H37 H41 H44 H46 H34
Sum
ETX
check
Data read
code
7
7
0
3
0
H37
H30 H03 H33 H30
+ Data check time
(About 10 to 30ms, which
depends on the instruction code)
Sum
check
code
F
4
Binary code
Binary code
4
229

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