Features Of The Serial Communication Module - Mitsubishi Electric QJ71C24N User Manual

1 OVERVIEW

1.2 Features of the Serial Communication Module

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MELSEC Q25HCPU
Q25HCPU
MELSEC
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The following describes the features of the Q series C24.
(1) Data communication based on the MELSEC communication
protocol (hereinafter referred to as the MC protocol)
(Details are explained in the MELSEC Communication Protocol Reference
Manual.)
(a) External devices can read/write the programmable controller device data
and sequence programs, and can monitor programmable controller
equipment status.
With the exception of the on-demand function described below, the
programmable controller does not require a sequence program because the
programmable controller sends and receives data based solely on
commands from external devices.
(b) Using the on-demand function, data can be sent from the programmable
controller CPU to the external devices in each frame format of the MC
protocol.
(c) Data communication can be performed using a program at the external
device side that has been created for communicating data with conventional
A/QnA series computer link module/serial communication modules.
(d) When an external device is a personal computer, use separately sold
communication support tools (MX Component). This allows a communication
program for the external device to be created, regardless of MC protocol's
transmitting/receiving procedure.
For details on MX Component, refer to Appendix 7 and the operating manual
of MX Component.
QJ71C24 QJ71E71
QJ71C24 QJ71E71
In the MELSECNET/H (MELSECNET/10 mode), other stations (including the
A/QnA series programmable controller CPUs) can be accessed during data link
operation.
The MC protocol is equivalent to the communication function using a dedicated
protocol that is supported by the A/QnA series computer link module/serial
communication modules.
QJ71C24 QJ71E71
MELSEC Q25HCPU
MELSEC-Q
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