Mitsubishi Electric FR-A800 Series Instruction Manual page 676

a. Communication request data from the computer to the inverter
Format
B
c. Reply data from the inverter to the computer (No data error detected)
Format
E
E1
E2
Format
E3
c. Reply data from the inverter to the computer (Data error detected)
Format
D
e. Transmission data from the computer to the inverter when reading data
Format
C (No data error
detected)
F (Data error
detected)
*1 A control code.
*2 The inverter station number is specified in hexadecimal in the range of H00 to H1F (stations No. 0 to 31).
*3 Set the delay time. When Pr.123 PU communication waiting time setting or Pr.337 RS-485 communication waiting time setting is set to
other than "9999", create the communication request data without "delay time" in the data format. (The number of characters decreases by 1.)
*4 CR+LF code: When a computer transmits data to the inverter, some computers automatically provide either one or both of the codes CR (carriage
return) and LF (line feed) at the end of a data group. In this case, the same setting is required for data sent from the inverter to the computer. Use
Pr.124 or Pr.341 for the CR+LF code setting.
 Data definitions
• Control code
Signal name
STX
ETX
ENQ
ACK
LF
CR
NAK
• Inverter station number
Specify the station number of the inverter which communicates with the computer.
• Instruction code
Specify the processing request, for example, operation or monitoring, given by the computer to the inverter. Therefore, the
operation or monitoring an item is enabled by specifying the corresponding instruction code. (Refer to
• Data
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Number of characters
1 2 3
Inverter station
*1
Instruction code
ENQ
*2
number
1 2 3
Inverter station
*1
Read data
STX
*2
number
Inverter station
*1
Read data
STX
*2
number
Inverter station
*1
Read data
STX
*2
number
1 2 3
Inverter station
*1
Read data (Inverter model information)
STX
*2
number
Number of characters
1 2 3
Inverter station
Error
*1
NAK
*2
code
number
Number of characters
1 2 3
Inverter station
*1 *4
ACK
*2
number
Inverter station
*1 *4
NAK
*2
number
ASCII code
H02
H03
H05
H06
H0A
H0D
H15
search engine
4 5 6 7
*3
Sum check
Number of characters
4 5 6 7
*1
Sum check
ETX
Number of characters
4 to 23
4 5
*4
4
Description
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)
8 9
*4
8 9 10 11
*1 *4
Sum check
ETX
*4
*1
Sum check
ETX
24 25 26
*1
Sum check
ETX
5.15 (N) Communication operation parameters
1
2
3
12 13
4
*4
5
27
*4
6
7
8
9
10
page 681.)
675
5. PARAMETERS