Chapter 1 Outline

Using network module JW-20CM, you can construct a communications system (satellite net) which can easily send and receive an ON/OFF signal (machine information) and numerical data (production data) between PCs and a host computer using equipment control.

Using remote I/O slave module JW-20RS, you can construct a remote I/O system as master station for PC that installed JW-20CM.

PCs which can use JW-20CM and JW-20RS are W70H/100H, JW50/70/100, and JW50H/70H/100H.

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Data link/computer link function

This function enables to send and receive ON/OFF signals and numeric data between modules on a network (satellite net) which is connected PCs and personal computers having network module ZW-20CM/JW-20CM/JW-22CM, network module ZW-98CM/ZW-20AX, and satellite net board Z- 335J.

Remote I/O function

If remote I/O slave module ZW-20RS/JW-20RS are mounted on I/O modules located separately, one PC having a network module JW-20CM can control these slave modules. (Connectable maximum 63 modules of slave stations.)

·In the remote I/O function, the remote I/O can choose either of synchronous or asynchronous for sending and receiving data with slave stations.

Synchronous type: Slave station scans input/output operation one time for each operation of the PC.

Asynchronous type: When PC's operation time is longer than data transfer required time of the remote I/O, the slave station scans input/output operation one time for each operation of the PC. When PC's operation time is shorter than the data transfer required time of the remote I/O, the slave station operate input and output one time for several operation of the PC.

Remote programming/remote monitor function

By constructing a satellite system using the JW-20CM, you can program and monitor other station’s PC’s (master station’s PC in case that remote I/O function) on the satellite system using a support tool.

·These remote programming and remote monitor functions are also available beyond one hierarchical layer difference (satellite net ←→ satellite net, satellite net ←→ SUMINET-3200).

*“SUMINET-3200” is a trademark of Sumitomo Electric Industries, Ltd.

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