The Manual's Use and Structure
How to use this manual
In this manual, details of the serial communication modules (QJ71C24N,
Please use this manual using the contents below as a reference.
(1)To learn about features, functions and component parts
(a)To learn about features and functions
•Chapter 1 describes the features of the serial communication modules.
•Chapter 3 describes the common specifications and functions of the serial communication modules.
(b)To learn about the packed items and
•The section prior to Chapter 1, "Product Configuration", describes the parts that are packed along with the serial communication module.
•Parts and components other than those packed with the module must be prepared separately by the user.
(2)To learn about processing required to start up the serial communication module
(a)To learn about the startup procedure
•Section 4.2 describes the general procedures prior to starting the operation of the serial communication module.
(b)To learn about the connection with the external devices
•Section 4.4 describes the connection methods for each type of interface.
(c)To learn about processing required prior to operation of the serial communication module
•Section 4.5 explains the parameter settings with GX Developer in order to use the serial communication module.
•Section 4.6 and Chapter 8 describe the settings from GX
To change an initial value, follow the procedure described in Chapter 8.
(d)To check for failure in the serial communication module
•Section 4.7 describes the test of the individual serial communication module.
(e)To learn how to check for a connection error with the external devices
•Section 4.8 describes how to perform the individual module test and the loopback test using MC
Details of the loopback test command are described in the reference manual.
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