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Appendix B: Instruction List
Appendix B-1 Basic Instructions
409
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
21
Memory
Cassette
22
Battery
A
Special Devices
(M8000-,D8000-)
B
Instruction List
C
Discontinued
models
D
Precautions for
battery
transportation
E
Handling of
batteries in EU
member states
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
MEF Conversion of operation result to trailing edge pulse
Mnemonic Function
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
STL Starts step ladder
RET Completes step ladder