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Chapter 1: Features and Functions
JW-21MN is a ME-NET module for JW20/JW20H/JW30H. Using this module, you can construct an ME-
NET combining various FA equipment such as personal computer and robot.
Using this module, you can easily transmit and receive ON/OFF signals and data with devices that
have a network module which is compatible with the ME-NET specifications.
[When you want to install a JW-21MN in the JW30H, make sure to select one that is compatible with
the JW30H. (See precautions inside the front page of this manual.)]
(1) Data link function
- Send and receive an ON/OFF signal (relay link) and data (register link)
between modules on the ME-NET.
*The amount of data that can be transmitted by one station is a maximum of 1024 bytes,
including both relay link and register link.
- In order to use memory effectively, the JW-21MN has a memory save function. When this
function is enabled, it only needs to receive the specifically required data.
.
(2) Computer link function
- Triggered on commands (instructions) from a host computer which has a network module
compatible with the ME-NET specifications, the JW-21MN starts reading and writing the memory
in the JW20/JW20H/JW30H.
- After an instruction is received from the host computer, the JW-21MN returns a response.
Therefore, the host computer is required to create an application program. For detailed
description of how to transmit instructions and receive responses, see the instruction manual for
the host computer.
(3) This module is available communication up to 64 stations. By using a cable, it can be
extended up to 1 km.
Reference
ME-NET is a communication network to link different brands of devices and equipment with different
models of facility control equipment. It has been developed under the support of Toyota Motor Co.,
Ltd.
Number of linkage pointsLinkage method
Relay link 2048 (256 bytes) in total
Register link 2048 bytes in total