Mitsubishi Electronics FX3G User Manual
59
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.7 Types and Setting of Parameters
1
Introdu
ction
2
Ov
ervi
ew
ew
3
Instruction
Li
st
4
D
evices
in Det
ai
l
5
Specifi
ed the
De
vice
&
C
onst
ant
ant
6
Bef
ore
ore
Pr
og
ra
mmi
ng
ng
7
Bas
ic
ic
Instruction
8
FN
C00-FN
C00-FN
C0
9
Program Fl
ow
9
FNC
10-FN
C19
Mov
e & Com
e & Com
pare
10
FNC
20-FNC
29
Arith. & Lo
gi
c
Operati
on
2
Setting memory capacity
Caution
• When the memory capacity of the FX
3S
is 16,000 steps, the program capacity is fixed to 4,000 steps, and the total
of the comment capacity and the file register capacity is limited to 12,000 steps (24 blocks).
The comment capacity is automatically set when the file register capacity is set.
The comment capacity is automatically set when the file register capacity is set.
• FX
3G
/FX
3GC
PLCs operate in the extension mode when the program capacity is 16,001 steps or more, and operate
in the standard mode when the program capacity is 16,000 steps or less.
The instruction execution time is longer in the extension mode than in the standard mode.
The instruction execution time is longer in the extension mode than in the standard mode.
Example:
Time required to execute the basic instruction "LD"
Standard mode: 0.21
Standard mode: 0.21
µs
Extension mode: 0.42
µs
• In FX
3U
/FX
3UC
PLCs, when symbolic information is stored, it is deleted if the memory capacity set by parameters is
changed.
After changing the memory capacity, write the symbolic information again.
After changing the memory capacity, write the symbolic information again.
Set item
Contents of setting
Setting range
Memory Capacity
Set the program memory capacity.
Refer to
Subsection
2.7.2 or Sub-
section 2.7.3
Comments Capacity
Set the capacity of comments to be stored in the PLC.
50 device comments/block (500 steps)
50 device comments/block (500 steps)
Symbolic Information
Capacity
Capacity
The symbolic information capacity when the built-in memory or a memory cassette is used is
displayed here based on the "Memory Capacity" value.
Press the [Check Other Items] button to display the symbolic information capacity when a
memory cassette is used.
displayed here based on the "Memory Capacity" value.
Press the [Check Other Items] button to display the symbolic information capacity when a
memory cassette is used.
File Register Capacity
Set the file register capacity.
500 file registers/block (500 steps)
500 file registers/block (500 steps)
Program Capacity
The number of steps available for sequence program is displayed here.
Special Function
Memory Capacity
Memory Capacity
Set whether "Special Function Block Settings", "Positioning Instruction Settings", "Built-in
CC-Link/LT Settings" should be enabled.
CC-Link/LT Settings" should be enabled.
–
Special Function
Block Settings
Block Settings
Selects the initial value setting function for special function unit/block.
–
Positioning
Instruction Settings
Instruction Settings
Validates the TBL (FNC152) instruction setting function.
–
Built-in CC-Link/LT
Settings
Settings
Validates the CC-Link/LT station information setting function.
–