Mitsubishi Electric MELSEC iQ-R User Manual page 39

■Response time
Response time is the time taken to obtain an attenuation characteristic (-53(dB)) after filter processing is started. The following
figure shows the response time.
Ex.
The output waveform obtained after an input SIN wave passed through a digital filter.
A
(1) 0
0
A
(2) 0
(5)
0
(3) (4)
A: Amplitude
t: Time (ms)
(1) Input waveform
(2) Waveform after the digital filtering
(3) Start of the filter processing
(4) Timing to obtain an attenuation characteristic
(5) Response time (Conversion cycle  Filter degree
*1 The filter degree is calculated with the following formula.
= 3.3  Sampling frequency  Attenuation band width
= 3.3  (1000000  Sampling cycle)  Attenuation band width (Value after the decimal point is rounded up.)
When the calculation result of the formula above is an even value, add 1 to the value so that it becomes an odd value.
t
t
*1
)
1 FUNCTIONS
1.5 A/D Conversion Method
1
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