Mitsubishi Electric MELSEC-A0J2H Series Handbook page 153

8
REPLACING THE COMMUNICATION MODULES
(2) When a product that cannot be replaced with CC-Link is included in the existing configuration
1) When a multidrop link module (A1SJ71UC24-R4) remains to be used as a spare
When a product from a partner manufacturer that cannot be replaced with CC-Link is included in a slave station of the
existing configuration, the product and the existing network can be used continuously by using the QA1S extension
base unit (QA1S6B/QA1S51B) on which the multidrop link module for the master station (A1SJ71UC24-R4) is
mounted.
The following figure shows a configuration example when the product from the partner manufacturer and the existing
network are continuously used.
* Example of existing configuration
Multidrop link
master station
A0J2HCPU
A0J2-C214S1
* Example of when the master station is replaced with the Q series
Station after replacement
with the Q series
(by using QA(1S) extension base unit)
Extension cable (QC B)
*2
*Multidrop link master station
*1 This module is required only when two systems are used.
*2 • Base unit: QA1S extension base unit (QA1S6 B or QA1S51B)
• Power supply module (The QA1S51B is not required.)
• Master module: A1SJ71UC24-R4
(Note that the module was discontinued on September 30, 2014.)
2) When a multidrop link module for the master station (A1SJ71UC24-R4) does not remain to be used as a spare
When a product from a partner manufacturer that cannot be replaced with CC-Link is included in a slave station of the
existing configuration, replacement of the network with the one using Q series modules is difficult.
Keep using all of the existing modules in the existing configuration.
Or replace only the replaceable module(s) with CC-Link and configure two networks.
Multidrop link Multidrop link remote station
remote station (from a partner manufacturer)
A0J2C25
A0J2 I/O module
Multidrop link Multidrop link remote station
remote station (from a partner manufacturer)
A0J2C25
A0J2 I/O module
Product from a partner
manufacturer
(difficult to replace
with CC-Link)
Product from a partner
manufacturer
(difficult to replace
with CC-Link)
Multidrop link
local station
A0J2HCPU
A0J2-C214S1
Multidrop link
local station
A0J2HCPU
A0J2-C214S1
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