Mitsubishi Q00JCPU User Manual page 902

APPENDICES
TableApp.49 Precautions for replacement and replacement methods (Program)
Item
Language and
Some instructions are not supported.
instruction
The Universal model QCPU operates
floating-point data in single precision.
When using the floating-point data
comparison instructions, LDE
Floating-point operation
ORE
ORED
are -0, nonnumeric, unnormalized number,
and
(error code: 4101) is detected.
(
=,<>,<=,>=,<,>.)
When a device number exceeds a setting
Device range check at range due to index modification, an
index modification OPERATION ERROR (error code: 4101)
is detected.
Low-speed execution type programs are
not supported.
Program execution type
A program execution type cannot be
changed by remote operation.
If latch ranges of internal user devices are
specified, the processing time is increased
in proportion to the device points set for
Latch setting
latching. (For example, if 8k points are
latched for a latch relay (L), the scan time
will be 28.6
The interrupt pointer (I49) for the high-
speed interrupt function is not supported.
Interrupt program Interrupt counters are not supported.
The interrupt pointers due to error
occurrence (I32 to I40) are not supported.
App
- 113 Appendix 5 Method of replacing High Performance model QCPU with Universal model QCPU
(2) Program
Precautions
, LDED , ANDED , and
, if the comparison source data
,
an OPERATION ERROR
indicates one of the followings;
.)
µs
Replacement method
Replace the instructions not supported in
the Universal model QCPU are described
in Appendix 5.3.
Instructions for floating-point double-
precision operation are added for the
Universal model QCPU.Replace the
instructions if floating-point double-
precision operation is required, as
described in Appendix 5.4.
, ANDE ,
When the floating-point data comparison
instructions are used, modify the program
as described in Appendix 5.4.
Uncheck the checkbox for "Check device
range at indexing" on the PLC RAS setting
tab of PLC parameter so that checking is
not performed.
Use scan execution type programs or
fixed scan execution type programs.
Use instructions for switching program
execution types, such as PSTOP, POFF,
and PSCAN.
The latch function of the Universal model
QCPU is enhanced.
(1) Large-capacity file registers (R, ZR)
(2) Writing/reading device data to the
standard ROM (SP.DEVST/
S(P).DEVLD instructions)
(3) Specifying internal devices as latch
ranges
Change the latch method to the method
described in (1) to (3) above according to
the application.
Consider the use of interrupt pointers for
fixed scan interrupt (I28 to I31).
Check the numbers of executions for
interrupt programs on the Interrupt
program monitor list screen of GX
Developer.
Appendix 5.3
Section 3.9.4,
Appendix 5.4, Appendix
5.4
Section 6.17
Section 3.3.3
Section 3.3.6
Section 6.3, Appendix
5.4
Section 6.22, Section
6.13.2, and Section
10.2.11
--- Section 10.11
(Continued on next page)
Reference