WindO/I-NV4 User’s Manual 3-1
3
Communication
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
HG2J-7U
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
When the read source is the value from the device address of the external device, read all the value of
device addresses used with the functions that are always executed during operation and the functions that
set for the displayed screens before starting the screens scan. Therefore, if a communication error occurs,
check the connection with the external device configured to the project.
• Functions that are always executed during operation:
Project Settings, Alarm Log Settings, Data Log Settings, Operation Log Settings, Recipe Function,
Preventive Maintenance Function, E-mail Settings, Social Media Settings, File Transfer, FTP Server
Manager, Sound Settings, Multimedia Settings, User Accounts and Global Script
• Functions that set for the displayed screens:
Parts set on the overlaying Base Screens and the displayed screens
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.
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