Chapter 3 Communication; Device Link Communication; Overview - IDEC MICRO/I HG4G-CJT22 F-B Series User Manual

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