Delta AS Series Programming Manual page 1209

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14. The instruction cannot be used in the ST programming language, interrupt tasks or function block which is called
only once.
Example 1
X0.4 external interrupt program
Notes
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1.
When M0 changes from OFF to ON, Y0.0 starts to output pulses. After outputting more than 30,000 pulses, the
external interrupt is detected on X0.4. The value in D0 increases by 1 and the pulse output stops after 15,000 pulses
= 15,000). If the interrupt does not occur, the output does not stop until 100,000 pulses are output.
(S
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2.
If the number of output pulses is between 1–30,000, they are in the fore mask section. The external interrupt occurs
at X0.4 at the moment and the instruction does not perform the ramp-down stop operation.
3.
If the number of output pulses is between 70,000–100,000, they are in the rear mask section. The external interrupt
occurs at X0.4 at the moment and the instruction still does not perform the ramp-down stop operation.
4.
When the pulse output completes, SM461 is ON and M0 is reset.
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