Introduction Of Applied Instructions; Major Applied Instructions - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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. 8.24A 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.
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.
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.
7. Symbolic information storage
The FX /FX PLC Ver. 3.00 or later can store symbolic information (data indicating the program configuration such
3U 3UC
as structure and labels).
By using this function, you can read the symbolic information from the PLC, and edit labels, function blocks, etc.
GX Works2 Ver. 1.62Q or later is required to store symbolic information.
→ Refer to the GX Works2 Version 1 Operating Manual (Common) for the details on symbolic information.
2.2

Introduction of Applied Instructions

1. Excellent fundamental performance
FX /FX /FX
3G 3U 3UC
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 /FX /FX
3G 3U
good operability.
2. Advanced control easily available
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.
2.2.1

Major applied instructions

This subsection introduces representative ones among many applied instructions.
1. Program flow
• Conditional jump (CJ/FNC 00)
• Call subroutine (CALL/FNC 01)
• Enable interrupt (EI/FNC 04)
• Disable interrupt (DI/FNC 05)
• Start a FOR/NEXT loop (FOR/FNC 08)
2. Move and compare
• Compare (CMP/FNC 10)
• Data comparison (FNC224 to FNC246)
• Floating point compare
(ECMP/FNC110 and EZCP/FNC111)
PLCs are equipped with not only fundamental applied functions for data transfer, data comparison,
PLCs have the specifications offering fundamental functions, high-speed processing, and
3UC
→ Refer to Chapter 8.
2 Overview (Sequence Program)
2.2 Introduction of Applied Instructions
→ Refer to the manual of the used programming tool.
→ Refer to the manual of the used programming tool.
→ Refer to the manual of the used programming tool.
• Zone compare (ZCP/FNC 11)
• High-speed counter compare (FNC 53 to FNC 55)
• High-speed counter compare with data table
(HSCT/FNC280)
• Move (MOV/FNC 12)
• Floating point move (EMOV/FNC112)
• High-speed counter move (HCMOV/FNC189)
• Conversion to binary-coded decimal
(BCD/FNC 18)
• Conversion to binary (BIN/FNC 19)
• Decimal to gray code conversion (FNC170) and
gray code to decimal conversion (FNC171)
→ Refer to Chapter 9, Chapter 13, Chapter 18,
Chapter 22, Chapter 24, Chapter 28 and
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Chapter 32.
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