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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.7 Types and Setting of Parameters
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
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.
•FX
3G/FX3GC 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.
Example: Time required to execute the basic instruction "LD"
Standard mode: 0.21 µs Extension mode: 0.42 µs
•In FX
3U/FX3UC 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.
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)
Symbolic Information
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.
File Register Capacity
Set the file register capacity.
500 file registers/block (500 steps)
Program Capacity The number of steps available for sequence program is displayed here.
Special Function
Memory Capacity
Set whether "Special Function Block Settings", "Positioning Instruction Settings", "Built-in
CC-Link/LT Settings" should be enabled.
–
Special Function
Block Settings
Selects the initial value setting function for special function unit/block. –
Positioning
Instruction Settings
Validates the TBL (FNC152) instruction setting function. –
Built-in CC-Link/LT
Settings
Validates the CC-Link/LT station information setting function. –