FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
458
B Instruction List
B-1 Basic Instructions
Appendix B: Instruction List
Appendix B-1 Basic Instructions
Appendix B-2 Step Ladder Instructions
Mnemonic
Function
Contact Instruction
LD
Initial logical operation contact type NO (normally
open)
LDI
Initial logical operation contact type NC (normally
closed)
LDP Initial logical operation of Rising edge pulse
LDF Initial logical operation of Falling/trailing edge pulse
AND Serial connection of NO (normally open) contacts
ANI Serial connection of NC (normally closed) contacts
ANDP Serial connection of Rising edge pulse
ANDF Serial connection of Falling/trailing edge pulse
OR Parallel connection of NO (normally open) contacts
ORI Parallel connection of NC (normally closed) contacts
ORP Parallel connection of Rising edge pulse
ORF Parallel connection of Falling/trailing edge pulse
Connection Instruction
ANB Serial connection of multiple parallel circuits
ORB Parallel connection of multiple contact circuits
MPS
Stores the current result of the internal PLC
operations
MRD
Reads the current result of the internal PLC
operations
MPP
Pops (recalls and removes) the currently stored
result
INV
Invert the current result of the internal PLC
operations
MEP
Conversion of operation result to leading edge pulse
*1
MEF
Conversion of operation result to trailing edge pulse
*1
*1. Supported in Ver. 2.30 or later
Out Instruction
OUT Final logical operation type coil drive
SET SET Bit device latch ON
RST RESET Bit device OFF
PLS Rising edge pulse
PLF Falling/trailing edge pulse
Master Control Instruction
MC Denotes the start of a master control block
MCR Denotes the end of a master control block
Other Instruction
NOP No operation or null step
End Instruction
END Program END, I/O refresh and Return to Step 0
Mnemonic Function
Mnemonic Function
STL Starts step ladder
RET Completes step ladder
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