568
(2) Program
*1 When device numbers equal to or greater than 64K words are used and index modification is performed, there will be no
increase in the number of steps.
*2 When the OUT instruction is used with a timer and counter and index modification is performed, the number of steps will
increase by three.
*3 When the following instructions are used and index modification is performed on the destination, the number of steps will
increase by two.
*4 Even when index modification is specified and a device number equal to or greater than 64K words is specified, there
will be no increase in the number of steps.
*5 When a device number equal to or greater than 64K words is used for the destination, the number of steps will increase
by two.
(3) Parameter size
*1 This applies when the QnUD(H)CPU is replaced with the High-speed Universal model QCPU.
Item Precautions Replacement method Reference
Number of steps
The number of basic steps differs in some
instructions.
If index modifications mentioned on the left
are frequently used in the program, the
program size may exceed the storage
capacity of the replaced CPU module. After
the program controller type is changed, check
the program size using the confirm memory
size function. If the program size exceeds the
storage capacity, take the following actions or
change the CPU module to that with larger
program memory.
• Move parameters and device comments to
the standard ROM.
• Reduce the reserved area for online
change.
• When a file register, extended data register,
or extended link register with device
numbers smaller then 64K words is used,
there is no increase in the number of steps.
Make adjustments so that device numbers
smaller then 64K words are used.
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The number of steps increases by one when:
• Index modification is performed.
*1*2*3
• A leading or trailing edge instruction is used.
• Device numbers equal to or greater than 64K
words are used in a file register, extended
data register, or extended link register.
*4*5
• Bit devices are used as word data by
specifying digits using K1, K2, K3, K5, K6, or
K7, or by specifying a device number of other
than multiples of 16.
Instruction name
+, - (2 devices)
D+, D (2 devices)
E+, E- (2 devices)
INC, DEC
DINC, DDDEC
NEG
DNEG
WAND, WOR, WXOR, WXNR (2 devices)
DAND, DOR, DXOR, DXNR (2 devices)
BSET, BRST
Item Precautions Replacement method Reference
Parameter size
The parameter size increases because the built-
in Ethernet port setting parameters are added.
*1
• Delete unnecessary files and free some
space.
• Move the parameter file to another memory
area.
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