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APPENDICES
A
Appendix 6 Precautions for Replacing QnUD(E)(H)CPU with QnUDVCPU/QnUDPVCPU
Appendix 6.1 Precautions
Appendix 6 Precautions for Replacing QnUD(E)(H)CPU
with QnUDVCPU/QnUDPVCPU
Appendix 6.1 Precautions
(1) System configuration
*1 This applies when the QnUD(H)CPU is replaced with the High-speed Universal model QCPU.
Item Precautions Replacement method Reference
RS-232 port
There is no RS-232 port.
*1
Use a USB or Ethernet port.
To communicate with an RS-232 interface,
use the QJ71C24N(-R2) in the system.
---
Applicable products and
software
• A programming tool that was available for the
QnUD(E)(H)CPU can no longer be used or
needs to be upgraded. (The use of GX
Developer is not supported in the system
after replacement.)
• Some GOTs and intelligent function modules
that were available for the QnUD(E)(H)CPU
can no longer be used or need to be
upgraded.
• Upgrade the version of GX Works2 to the
one compatible with the QnUDVCPU and
QnUDPVCPU.
• Replace the GOT and intelligent function
modules with those compatible with the
QnUDVCPU and QnUDPVCPU.
Page 513, Appendix 5.2
Multiple CPU system
Scan time is shortened in the High-speed
Universal model QCPU and Universal model
Process CPU because operations are
performed at higher speed. When used in a
multiple CPU system, the High-speed Universal
model QCPU and Universal model Process
CPU access to the other modules frequently. As
a result, the processing time in other CPU
modules may increase.
Check the processing timings of other CPU
modules and adjust the access frequency of
the High-speed Universal model QCPU and
Universal model Process CPU using timers or
the constant scan function.
QCPU User's Manual (Multiple
CPU System)
Current consumption The current consumption increases.
Select a power supply module according to
the total current consumption in the system.
QCPU User's Manual
(Hardware Design,
Maintenance and Inspection)
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