Delta ASD-A2-0121 Series User Manual page 337

Chapter 8 Parameters
Note: When the source of external pulse is from the high-speed differential signal
If the user uses 2 ~ 4 MHz input pulse, it is suggested to set the filter value to 4.
Note: When the signal is the high-speed pulse specification of 4 Mpps and the settings
Logic Type

Logic
0
8-38
and the setting value is 0 (the high-speed filter frequency is 3.33 Mpps at the
moment), then:
<150ns
150ns
Pulse Input
filtered signal
When this pulse width is shorter than 150
ns, it will be regarded as low level. Two
input pulse will be seen as one.
When High, Low duty of the pulse width are longer than 150 ns,
it can ensure the pulse command will not be filtered.
value of the filter is 4, then the pulse will not be filtered.
Pulse
Type
A Pulse Phase Lead
(43)
AB
Pulse
Phase
(41)
Pulse
(36)
T1
Sign
(37)
(43)
Pulse
CW and
(41)
CCW
T2 T2 T2 T2 T2
(36)
Pulse
Sign
(37)
Pulse Input
filtered signal
When this pulse width is shorter than 150
ns, it will be regarded as high level. Two
input pulse will be seen as one.
>150 ns
>150 ns
High-speed and Low-speed Pulse Input
Forward
TH
T1 T1 T1 T1
TH
T2
<150ns
150ns
Reverse
A Pulse Phase Lag
(43)
Pulse
(41)
(36)
Sign T1 T1 T1 T1
(37)
T3
T2 T2 T2 T2 T2
ASDA-A2
TH
T1 T1
T2
TH