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TableApp.4 Precautions for replacement and replacement methods (Program) (Continued)
Item
Precautions
Replacement method
Reference
The latch function of the Universal model
QCPU is enhanced.
(1) Large-capacity file register (R, ZR)
If latch ranges of internal user devices are
Latch setting
(2) Writing/reading device data to the
standard ROM (SP.DEVST and
specified, the processing time is added in
proportion to the device points set to be
latched.
S(P).DEVLD instructions)
(3) Latch range specification of internal
Section 6.3, Appendix
3.4.4
devices
Change the latch method to the method
described in (1) to (3) above according to
the application.
Check the numbers of executions for
Interrupt counter
Interrupt counter is not supported.
interrupt programs on the Interrupt
program monitor list screen of GX
Section 6.13.2, 9.2.11
Developer.
SCJ instruction
When the SCJ instruction is used in the
Insert the AND SM400 (or NOP
Section 6.5.1 in the
Universal model QCPU, the AND SM400
instruction) immediately before the SCJ
QCPU Programming
(or NOP instruction) needs to be inserted
instruction when the SCJ instruction is
Manual (Common
immediately before the SCJ instruction.
used.
Instructions)
of the target station specified in D3 when
To get the same operation as the Basic
Section 8.3.2 in the
the SREAD and SWRITE instructions are
model QCPU, omit D3 or use the READ
QCPU Programming
used is available. (The Basic model
instruction instead of the SREAD instruc-
Manual (Common
QCPU ignores the device specified in
tion.
Instructions)
Use of the completion notification device
JP/GP.SREAD and JP/
GP.SWRITE
instructions
D3.)
The number of index registers is
increased to 20 for the Universal model
ZPUSH instruction
QCPU. The area for saving the data in the
index register with the ZPUSH instruction
Section 7.18.8 in the
Increase the save area used for the
QCPU Programming
ZPUSH instruction as needed.
Manual (Common
Instructions)
is increased as well.
Use of the annunciator
(SET F
F
and OUT
instructions)
When the annunciator is turned on by the
SET F
or OUT F
instruction, the
---
USER LED turns on.
---
(The ERR.LED does not turn on.)
Execute I/O refresh at the start or end of
each program with the RFS or COM
I/O refresh between
I/O refresh between programs cannot be
instruction.
programs
executed.
(When the COM instruction is used, I/O
---
refresh to be executed can be specified in
SD778 by turning on SM774.)
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.
If the user setting area in the CPU shared
memory is specified in the program,
Multiple CPU system
The start address for the user setting area
change the address for the user setting
(auto refresh) in the CPU shared memory
area by performing an operation for
is changed.
replacing a device in GX Developer.
---
(Example: "MOV D0 U3E0\G192"
"MOV D0U3E0\G2048")
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