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4
4 Instructions4.1.6 Other Processing Instructions
END: End of all programs
◆
Overview
The END instruction ends all programs.
END
End of all programs Applicable model:
H3U
An independent instruction without operands and contact driving
16-bit instruction (1
step)
END: Continuous
execution
◆
Function
The END instruction is added only at the end of a ladder chart program or instruction program. The PLC
scans the END instruction based on the address 0 of the user program, executes this instruction, and then
returns to the address 0 for a new scan. The program space after the END instruction is not processed. In
AutoShop, the FEND or END instruction is automatically added during the downloading process. Manual
instruction input is not required.
4.1.6 Other Processing Instructions
Other processing
instructions
NOP No action
WDT Watchdog timer reset
Instruction Operand
NOP None
The NOP instruction does not perform any operation in a program; therefore, the original logical operation
result is retained after this instruction is executed. This instruction is automatically deleted during the
AutoShop programming process to reduce the waste of program space and increase the running speed.
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