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Configuration of this manual
The network module JW-20CM has three functions: "remote I/O," "data link," and "computer link" functions.
Accordingly, this manual describes about these three functions. Read each section according to your use of
any of these functions.
Users who use the network module for the first time.
Read this manual from chapter 1.
First, thoroughly understanding general, precautions, name and function of each section. Then, read
the contents from chapter 5 for proper use.
Users who want to use the remote I/O function.
Read from chapter 1 to chapter 7 and properly install and connect wiring work of the module. Then set
switches and parameters by referring chapter 8 for correct use.
Switch setting
· Master module: JW-20CM ....... See page 8·9
· Slave module: JW-20RS .......... See page 8·14
Parameter setting
· Master module: JW-20CM ....... See page 8·19
· Slave module: JW-20RS .......... See page 8·30
Users who want to use the data link function (including the computer link function)
Read from chapter 1 to chapter 7 and properly install and connect wiring work of the module. Then set
switches and parameters by referring chapter 9 for correct use.
The module also can function the computer link as data link system with a host computer having a
network module: ZW-98CM/ZW-20AX.
Switch setting
· Master module ............... See page 9·17
· Slave module ................. See page 9·17
Parameter setting
· Master module ............... See page 9·22
· Slave module ................. See page 9·33
Users who want to use only the computer link function
Read from chapter 1 to chapter 7 and properly install and connect wiring work of the module. Then set
switches by referring chapter 10 for correct use.
Switch setting ......... See page 10·3
Users who want to save and load parameter contents using a support tool.
Carefully read the contents of chapter 11 for correct use.
Users who want to add a communication station.
Carefully read the contents of chapter 7 and add a station.