SmartAXIS Touch User's Manual 22-3
2 O/I Link Communication
22
Communication
2.1 Overview
O/I Link Communication is a protocol for communication between Master and Slave, where a Touch connected to the
external device is configured as a Master and multiple Touch (Slaves) communicate with the external device via the
Master.
The Master Touch unit communicates with the external device by means of PLC Link Communication. The Master
Touch is called an O/I Link Master and a slave Touch connected to the O/I Link Master is called an O/I Link Slave. A
maximum of 15 O/I Link Slaves can be connected to an O/I Link Master.
2.2 O/I Link Communication Settings
These settings are configured under the O/I Link tab on the Project Settings dialog box. The Project Settings dialog
box can also be accessed using the following methods.
•Click Project on the Configuration tab.
•Double click Project Settings in the Project window.
The O/I Link Communication Settings can only be configured when O/I Link Master or O/I Link Slave is selected
in Protocol under Interface Settings on the Communication Interface tab. For details, refer to Chapter 3 “3.6
O/I Link Tab” on page 3-37.
2 O/I Link Communication
Read Write
5678
External device
0
1
Read
Write
D1:
M1:
5678
Touch
O/I Link Slave
(Slave 1)
Touch
O/I Link Slave
(Slave 2)
Touch
O/I Link Slave
(Slave 15)
Touch
O/I Link Master
O/I Link Communication
PLC Link Communication
Numerical Display
Reference Device: D1
Bit Button
Destination Device: M1
Read Write Read Write
• The MICRO/I models that can communicate with the Touch using O/I Link Communication are the
HG2G-S/-5S/-5F, and HG3G/4G.
• For details regarding the O/I Link Communication, refer to Chapter 3 "O/I Link Communication" in the
"External Device Setup Manual".
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