Overview; Overview Of The Serial Communication Module - Mitsubishi QJ71C24N User Manual

1 OVERVIEW

1 OVERVIEW
This manual describes the specifications for the QJ71C24N, QJ71C24N-R2,
QJ71C24N-R4, QJ71C24, QJ71C24-R2 serial communication module (hereinafter
referred to as "Q series C24"), as well as the procedures prior to starting the operation,
maintenance, inspection, data communication methods for use with external devices
and troubleshooting.
When applying the following program examples to the actual system, make sure to
examine the applicability and confirm that it will not cause system control problems.

1.1 Overview of the Serial Communication Module

The Q series C24 is a module that connects the Q series programmable controller
CPU and an external device using an RS-232 or RS-422/485 line for serial
communication, in order to achieve the data communication described below.
By using a modem/terminal adapter, a public line (analog/digital) can be used for data
communication with a remote location.
• Programmable controller data collection/change from the external devices
• Programmable controller monitoring and control from the external devices (See the
• Data receiving and sending in any formats that conform to the external device
• Collection of measured data from a measuring device (See Section 1.2. (2) and (4).)
• Operation of a programmable controller CPU that is connected to a personal
• Collection of measured
data
• Collection of read data
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(See the MELSEC Communication Protocol Reference Manual.)
User's Manual (Application).)
specifications (See Section 1.2. (2), (3), and (4).)
computer installed with GX Developer. (See the GX Developer Manual.)
QJ71C24-R2
RUN ERR.
NEU NEU
CH.1 SD SD CH.2
RD RD
CH. 1
Being a convenient means of connection among different devices (PCs, display
devices, printers, etc.), the serial communication line is the most widely used
medium on the market today
MELSEC-Q
• Programmable controller data
collection/change
• Programmable controller monitoring
and control from an external device
• Data receiving and sending in any
formats that conform to the external
device specifications
• GX Developer
• File writing/reading
• Device monitoring/testing
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