Sharp JW-20CM - Manual (Page 9)

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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.
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.