Mitsubishi Electric MELIPM Series Instruction Manual page 70

(5) Explanation of communication data structure
1) Control codes
The following table lists the ASCII codes and their definitions of the control
code names which are set at the beginning, end and like of the format.
Signal Name
STX
ETX
ENQ
ACK
LF
CR
NAK
2) Station number
Specify the station number of the drive unit used for communication with the
computer.
Specify the drive unit station number within the range H00 to H1F (stations
0 to 31) in hexadecimal.
The communication data is converted into ASCII automatically.
Example: H00 (binary)
3) Instruction codes and data codes
The instruction code and data code have been set in correspondence with
the operation mode, operation or parameter write or read.
The communication data is converted into ASCII automatically.
i) Setting the operation mode
Setting Item
Mode
Write
Operation
mode
Read
ASCII Code
H02 Start of Text (Start of data)
H03 End of Text (End of data)
H05 Enquiry (Communication request)
H06 Acknowledge (No data error detected)
H0A Line Feed
H0D Carriage Return
H15 Negative Acknowledge (Data error detected)
H3030 (ASCII)
Instruction
Data Codes and Definitions
Code
H0001: External operation mode
HFB
H0002: Communication operation mode
H0001: External operation mode
H7B
H0002: Communication operation mode
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8 PARAMETER FUNCTIONS
Description
8-16
Character
count
4
4