APPENDICES
Appendix 5 Method of replacing High Performance model QCPU with Universal model QCPU
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* 1: The local device file usability setting is not available for the Universal model QCPU when the first
five digits of the serial number are "10011" or earlier.
TableApp.46 Precautions for replacement and replacement methods (Program) (Continued)
Item
Precautions
Replacement method
Reference
SCJ instruction
When the SCJ instruction is used in the
Universal model QCPU, the AND SM400
(or NOP instruction) needs to be inserted
immediately before the SCJ instruction.
Insert the AND SM400 (or NOP
instruction) immediately before the SCJ
instruction when the SCJ instruction is
used.
Section 6.5.1 in the
"QCPU(Q Mode)/
QnACPU Programming
Manual (Common
Instructions)"
ZPUSH instruction
The number of index registers is increased
to 20 for the Universal model QCPU. The
areas for saving index registers with the
ZPUSH instruction need to be increased
as well.
Increase the save areas used for the
ZPUSH instruction as needed.
Section 7.18.8 in the
"QCPU(Q Mode)/
QnACPU Programming
Manual (Common
Instructions)"
File usability setting for
each program
The following file usability setting for each
program is not available.
*1
• File register
• Device initial value
• Comment
When file usability is set, modify the
program as described in Appendix 5.4.
Section 3.3.6, Appendix
5.4 and Appendix 5.4
I/O refresh setting for
each program
I/O refresh setting for each program is not
available.
Use the RFS instruction if I/O refresh
setting for each program is required.
Section 3.3.6 in the
"QCPU(Q Mode)/
QnACPU Programming
Manual (Common
Instructions)"
SM/SD
Usage of some of the special relays and
special registers is different.
Replace corresponding special relays and
special registers as described in Appendix
5.5.
A-compatible special relays and special
registers are not supported.(SM1000 to
SM1255/SD1000 to SD1255)
Using GX Developer, A-compatible special
relays and special registers can be
replaced with the Universal model QCPU-
compatible special relays and special
registers. Note that the ones which are not
compatible with the Universal model
QCPU are replaced with SM1255 and
SD1255. Modify programs as needed.
Processing time
Scan time and other processing times are
different.
Modify programs as needed, checking the
processing timing.
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