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OVERVIEW
CHAPTER1 OVERVIEW
This manual provides information on the specifications, functions, preoperational
procedure, programming and troubleshooting of the QJ71GP21-SX and QJ71GP21S-SX
CC-Link IE controller network modules (hereinafter referred to as CC-Link IE controller
network module).
When applying a program example introduced in this manual to the actual system, make
sure to examine the applicability and confirm that it will not cause system control
problems.
The CC-Link IE controller network module allows connection of MELSEC-Q series
programmable controllers to the CC-Link IE controller network, realizing high-speed and
large-volume data communications between the controllers in the network.
POINT
(1) The existing MELSECNET/G network module has been integrated into the
CC-Link IE controller network module.
(2) The CC-Link IE controller network is an improved system that has a higher
processing speed and a larger data capacity than the MELSECNET/H
network system (PLC to PLC network).
For comparisons between CC-Link IE controller network and MELSECNET/H,
refer to the following.
Appendix 4 Comparison between CC-Link IE controller network and
(3) One network (of the same network No.) cannot contain both CC-Link IE
controller network and MELSECNET/H modules. (Different networks must be
used.)
• CC-Link IE controller network module: Used for CC-Link IE controller
network
• MELSECNET/H module: Used for MELSECNET/H or MELSECNET/10
Figure 1.1 CC-Link IE controller network
Duplex loop
High-speed and
large-volume data
communications
CC-Link IE controller network
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