29
CHAPTER 3 SPECIFICATIONS
3
3.2 Per
formance Specif
icatio
ns
*1
Counting speed setting can be done using the parameter setting. (
*2
Note that the count may be done incorrectly by inputting pulses whose phase difference is small between the phase A
pulse and phase B pulse. To check the input waveform of the phase A pulse and phase B pulse, or to check phase
difference between the phase A pulse and phase B pulse, refer to the following:
*3
The counting speed is affected by the pulse rise/fall time. The applicable counting speed is listed below.
Note that the count may be done incorrectly by counting pulses with long rise/fall time.
Counting speed
switch setting
8Mpps
4Mpps
2Mpps
1Mpps
500kpps
200k
pps
100k
pps
10k
pps
*Counting speed = 1/T (pps)
Rise/fall time
Both 1- and 2-phase inputs
t = 0.125µs
2Mpps
1Mpps
500kpps
200kpps
100kpps
10kpps
t = 0.25µs or less
1Mpps
1Mpps
500kpps
200kpps
100kpps
10kpps
t = 0.5µs or less
⎯
500kpps
500kpps
200kpps
100kpps
10kpps
t = 1.25µs or less
⎯
⎯
200kpps
200kpps
100kpps
10kpps
t = 2.5µs or less
⎯
⎯
⎯
100kpps
100kpps
10kpps
t = 25µs or less
⎯
⎯
⎯
⎯
10kpps
10kpps
t = 500µs
⎯
⎯
⎯
⎯
⎯
500pps
t
t
T
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