WindO/I-NV4 User’s Manual 3-1
3
Communication
1
This chapter describes the communication between the MICRO/I and the external device.
1.1 Overview
Device Link Communication refers to the communication protocol used for communication with the MICRO/I, via the
CPU Unit
*1
or PLC Link Unit
*1
Programming Port of the external device connected to the MICRO/I.
The MICRO/I continuously reads the values of the external device addresses on the currently displayed screen, and
external devices (such as relays and registers) on the screens are updated with the latest data at all times.
When a button is pressed or a command is executed in the MICRO/I screen, the value is written to the external device
address.
*1 Unit names vary based on the manufacturer of the external device.
Chapter 3 Communication
1 Device Link Communication
HG3G
HG2G-5FHG5G-V HG4G-V HG3G-V HG2G-V HG2G-5T
HG4G HG1G HG1P
MICRO/I
1234
External device
Device Link Communicationn
0
1
Read
Write
D0:
M0:
1234
Numerical Display
Reference Device Address: D0
Bit Button
Destination Device Address: M0
For details regarding the Device Link Communication, refer to Chapter 1 "Device Link Communication" and
Chapter 2 "Connection to External Devices" in the WindO/I-NV4 External Device Setup Manual.