Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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(N) Operation via communication and its settings Parameters
5 - 640
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Data reading format
– Communication request data from the computer to the inverter
– Reply data from the inverter to the computer (No data error detected)
– Reply data from the inverter to the computer (Data error detected)
– Transmission data from the computer to the inverter when reading data
Indicates a control code.
Specifies the inverter station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal.
When Pr. 123 and Pr. 337 (Waiting time setting) ≠ 9999, create a communication request data
without "waiting time" in the data format. (The number of characters decreases by 1.)
CR, LF code: When data is transmitted from the computer to the inverter, codes CR (carriage return)
and LF (line feed) are automatically set at the end of a data group on some computers. In this case,
setting must be also made on the inverter according to the computer. Whether the CR and LF codes
will be present or absent can be selected using Pr. 124 or Pr. 341 (CR/LF selection).
Format
Number of characters
1 2 3 4 5 6 7 8 9
B
ENQ
Inverter station No.
Instruction code Sum check
Format
Number of characters
1 2 3 4 5 6 7 8 9 10 11 12 13
E
STX
Inverter station
No.
Read data
ETX
Sum check
E1
STX
Inverter station
No.
Read data
ETX
Sum check
E2
STX
Inverter station
No.
Read data
ETX
Sum check
Format
Number of characters
1 2 3 4 to 23 24 25 26 27
E3
STX
Inverter station
No.
Read data (Inverter model information)
ETX
Sum check
Format
Number of characters
1 2 3 4 5
D NAK
Inverter station No.
Error
code
Format
Number of characters
1 2 3 4
C
(No data error detected)
ACK
Inverter station No.
F
(Data error detected)
NAK
Inverter station No.