Chapter 3 Communication; Device Link Communication; Overview - IDEC WindO/I-NV4 User Manual

Chapter 3
This chapter describes the communication between the MICRO/I and the external device.
1

Device Link Communication

1.1 Overview

Device Link Communication refers to the communication protocol used for communication with the MICRO/I, via the
*1
CPU Unit or PLC Link Unit
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.
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.
*1 Unit names vary based on the manufacturer of the external device.
Communication
HG2J-7U HG5G-V HG4G-V
*1
Programming Port of the external device connected to the MICRO/I.
Device Link Communicationn
MICRO/I
1234
WindO/I-NV4 User's Manual
HG4G HG3G-V HG3G HG2G-V
External device
Read
Write
HG2G-5F HG2G-5T HG1G HG1P
D0: 1234
0 1
M0:
3-1
3