User guide

Chapter 4
588
External Device Setup Manual
8 DM Link 1:N Communication Format
The communication format with DM Link 1:N Communication is as follows.
• Command (Response)
Read
Write Clear
8.1 Read
The Read command is used by the external device to read the MICRO/I or Touch data memory.
One command can read a maximum of 255 words of data.
8.1.1 Command
Format
Detailed description
Command Code Description Bytes
ENQ 05h Command Start 1
Station Number DM Link Station Number expressed in ASCII. 2
R 52h Read Command 1
DM address DM address to start reading from
This is expressed as the ASCII code of the hexadecimal value of the address.
4
Words Number of words to read
The hexadecimal value expressed using ASCII code.
2
BCC Only required when 'with BCC' is set.
Exclusive OR (HEX) from ENQ to before BCC converted to ASCII code.
2
CR 0Dh End 1