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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.2 Introduction of Applied Instructions
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
3. "Memory hold stop" function for holding the output status during the RUN mode even in the
STOP mode
When the special auxiliary relay M8033 is driven, the PLC stops and holds the output status during the RUN
mode.
4. Registration of "entry code" for protecting programs
The entry code can be registered to prevent erroneous read/incorrect write protection of created sequence
programs.
With regard to online operations from GX Developer (Ver.8.23Z or later) and handy programming panels, the
program protection level can be set by the entry code specification method. In this case, such specification
that "changes of a program are disabled, but monitoring and changes of present values are enabled" is
available.
→ Refer to the manual of the used programming tool.
5. Addition of "comments" for a sequence program
By setting parameters, the device comment area (where Katakana, Kanji and alphanumeric characters are
available) can be secured in the program memory.
→ Refer to the manual of the used programming tool.
6. Writing programs in the RUN mode
Programs can be changed while the PLC is operating (RUN mode).
By this function, programs can be adjusted and changed efficiently without stopping the machine.
→ Refer to the manual of the used programming tool.
2.2 Introduction of Applied Instructions
1. Excellent fundamental performance
FX3G/FX3U/FX3UC PLCs are equipped with not only fundamental applied functions for data transfer, data
comparison, arithmetic operations, logical operations, data rotation, and data shift but also high speed
processing instructions for I/O refresh, interrupt, comparison dedicated to high speed counters, and high
speed pulse output as well as initial state instructions by which standard operations for machine control are
made into packages in the SFC control. In this way, FX
3G/FX3U/FX3UC PLCs have the specifications offering
fundamental functions, high speed processing, and good operability.
2. Advanced control available easily
In addition, FX PLCs offer many handy instructions by which complicated sequence control is made into
packages to mitigate the load for creating sequence programs and save the number of I/O points.
FX PLCs also offer floating point arithmetic operations and PID operations to cope with more advanced
control.
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