IDEC SmartAXIS Touch FT1A Series User Manual

3 DM Link Communication
22-4 SmartAXIS Touch User's Manual
3.1 Overview
DM Link Communication reads and writes value to external devices using the Touch's dedicated DM Link memory. The
device type of dedicated DM Link memory is DM.
This method uses a dedicated IDEC protocol, so a communication program is required in the external device.
●
Communication Methods
There are two basic types of DM Link Communication. 1:1 Communication, where the Touch is connected to an
external device; and 1:N Communication, where multiple Touch are connected to an external device.
■ 1:1 Communication
The external device is connected to a single Touch.
The Event Transmission function from the Touch can be used with 1:1 communication.
The Event Transmission function is a function that works as follows. When value in the dedicated DM Link memory of
the Touch is changed, the data is transmitted from the Touch to the external device.
3 DM Link Communication
Touch
999
5678
External device
DM Link Communication
Read
Write
DM0:
999
DM1:
1234 5678
DM0
DM1
DM2
DM8190
DM8191
Dedicated DM Link memory
Numerical Display
Destination Device: DM0
Numerical Display
Reference Device: DM1
For details regarding the DM Link Communication, refer to Chapter 4 "DM Link Communication" in the
"External Device Setup Manual".
Touch
Dedicated DM
Link memory
External device
DM Link 1:1 Communication
Read
Write
Touch
Event transmission
Dedicated DM
Link memory
External device
DM0: 0
DM1:
0
DM2:
0
100
150
200
DM0:
100
DM1:
150
DM2:
200
DM Link 1:1 Communication

IDEC SmartAXIS Touch FT1A Series Specifications

General

Brand	IDEC
Model	SmartAXIS Touch FT1A Series
Category	Controller
Language	English