Delta AS Series Programming Manual page 1218

Explanation
1.
When M0 is ON, Y0.0 and Y0.2 outputs 1000 pulses at 1kHz simultaneously. When M1 is ON, it indicates Y0.0 and
Y0.2 are used for high-speed pulse output.
2.
When the Y0.0 pulse output is completed, SM461 is ON. When the Y0.2 pulse output is completed, SM481 is ON.
And if M1 is also ON, it triggers SM470 (output completion auto-reset for Y0.0) and SM490 (output completion
auto-reset for Y0.2) to be ON. Y0.0 and Y0.2 are free and ready to be used again and M1 is cleared to OFF.
3.
When M0 switches from OFF to ON, the pulse output is restarted.
4.
When there are more than two high-speed output instructions in a program, do not use the variable name, M1,
repeatedly.
5.
It is suggested not to use ST language in a program if there is any chance the outputting needed to be stopped.
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