Siemens PLC how to prevent input pulse loss - Database & Sql Blog Articles

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

SMD aluminum electrolytic capacitor

Photocoupler

(1) With the high-speed counter function acquisition, as long as the high-speed counting maximum operating frequency is higher than the pulse frequency, the pulse will not be lost.

(2) With the timing interrupt and pulse acquisition subroutine acquisition, as long as the acquisition time interval is less than the reciprocal of the pulse frequency, the pulse will not be lost.

(3) Permanent external interrupt (input with interrupt function) and pulse acquisition subroutine acquisition, also ensure that the interrupt response speed is fast enough to not lose the pulse.

(4) If the pulse frequency is not high, such as every 20 times / s, the general input point is directly collected, the problem is not large.