IDEC FC4A-C10R2 User Manual page 333

Fc4a series microsmart micro programmable logic controller

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Timing Chart for Disable Pulse Counting

This program demonstrates a timing chart of the PULS2 instruction without pulse counting.

Output Pulse Frequency D101

Pulse Output ON M20

Pulse Output Complete M21

• When input I1 is turned on, PULS2 starts to generate output pulses at the frequency designated by the value

stored in data register D101. While the output pulses are sent out from output Q1, internal relay M20 remains on.

• When input I1 is turned off, PULS2 stops generating output pulses immediately, then internal relay M20 turns off

and internal relay M21 turns on.

• If the output pulse frequency value in D101 is changed while generating output pulses, the change takes effect in

the next scan. When changing the pulse frequency, make sure that the timing of the change is much slower than

the output pulse frequency, so that the pulse frequency is changed successfully.

D102 = 0 (disable pulse counting)

Start Input I1

Output Pulse Q1

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