Mitsubishi Electric melsec q00ujcpu User Manual page 557

(2)
Program
TableApp.10 Precautions for replacement and replacement methods (Program)
Item
Language and
Some instructions are not supported.
instruction
The Universal model QCPU performs
program operations of floating-point data
in single precision.
When using the floating-point data
Floating-point
comparison instructions, LDE
operation
ANDE
and ORED
data are -0, nonnumeric, unnormalized
number, or
ERROR " (error code: 4101) is detected.
(
=,<>,<=,>=,<,>.)
When a device number exceeds a setting
Device range check at range due to index modification,
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 added in
proportion to the device points set to be
Latch setting
latched. (For example, if 8K points are
latched for the latch relay (L), the
processing time of 28.6
App - 13
Precautions
,
, ORE , LDED , ANDED
, if the comparison source
,
"OPERATION
indicates one of the followings;
s is required
Replacement method
Replace the instructions not supported in
the Universal model QCPU are described
in Appendix 3.3.
Instructions for floating-point double-
precision operations are added for the
Universal model QCPU. Replace the
instructions if floating-point double-
precision operations ares required, as
described in Appendix 3.4.
,
When the floating-point data comparison
instructions are used, modify the program
as described in Appendix 3.4.2.
Deselect the "Check device range at
indexing" checkbox in the PLC RAS tab of
the PLC parameter dialog box 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 register (R, ZR)
(2) Writing/reading device data to the
standard ROM (SP.DEVST and
S(P).DEVLD instructions)
(3) Latch range specification of internal
devices
.)
Change the latch method to the method
described in (1) to (3) above according to
the application.
Reference
Appendix 3.3
Section 2.4.4, Appendix
3.4, Appendix 3.4.2
Section 6.17
Section 2.3
Section 2.3
Section 6.3, Appendix
3.4.3
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