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* 1: Even the local device file usability setting is not available for the Q02UCPU, Q03UDCPU, Q04UDHCPU, and Q06UDHCPU if the serial
number (first five digits) is "10011" or earlier.
TableApp.9 Precautions for replacement and replacement methods (Program) (Continued)
Item Precautions Replacement method Reference
Interrupt program
The interrupt pointer (I49) for the high-
speed interrupt function is not supported.
Consider the use of interrupt pointers for
fixed scan interrupt (I28 to I31).
Section 6.13.2, 9.2.11
Interrupt counter is not supported.
Check the numbers of executions for
interrupt programs on the Interrupt
program monitor list screen of GX
Developer.
The interrupt pointers (I32 to I40) due to
an error are not supported.
--- Section 9.11
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 Programming
Manual (Common
Instructions)
ZPUSH instruction
The number of index registers is
increased to 20 for the Universal model
QCPU. The area for saving the data in the
index register with the ZPUSH instruction
is increased as well.
Increase the save areas used for the
ZPUSH instruction as needed.
Section 7.18.8 in the
QCPU Programming
Manual (Common
Instructions)
File usability setting for
each program
The following file usability setting for each
program is not available.
*1
• File register
• Initial device value
• Comment
When file usability is set, modify the
program as described in Appendix 3.4.
Section 2.3, Appendix
3.4.5
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 2.3
• QCPU Programming
Manual (Common
Instructions)
SM/SD
Usage of a part of the special relay and
special register is different.
Replace the corresponding special relay
and special register as described in
Appendix 3.5.
Appendix 3.5
A sereis-compatible special relay and
special register are not supported.
(SM1000 to SM1255/SD1000 to SD1255)
Using GX Developer, A series-compatible
special relay and special register can be
replaced with the Universal model QCPU-
compatible special relay and special
register. Note, however, that the ones
which are not compatible with the
Universal model QCPU are replaced with
SM1255 and SD1255. Modify programs
as needed.
Chapter 12
Processing time
Scan time and each processing time are
different.
Modify programs as needed, checking the
processing timing.
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