Vigor VS Series - The X0~X7 High Speed Input Function Description

The input points X0~X7 of the VS Series PLC have the abilities to respond to high-speed input and to execute many
high speed functions. The functions of these 8 output points are listed as follows.
Function
External Input Point
IX3P/ F
Ref.
Page
X0
X1 X2
X3
X4
X5 X6
X7
Use D9020 to adjust the lter time as 0~60ms.
Use the SPD instruction to perform the speed detection function
Use C235~C255 1-phase/2-phase/AB phase counters, besides to generate IHC0~IHC7 interrupt
IX0P/ F IX1P/ F IX2P/ F IX4P/ F IX5P/ F IX6P/ F IX7P/ F
M9170 M9171 M9172 M9173 M9174 M9175 M9176 M9177
179
186
25
54
55
58
53
2-15 The X0~X7 High Speed Input Function Description
Frequency Meter
Software High Speed
Counter
External Interrupt
Hardware High Speed
Counter
Pulse Capture
HHSC1, to make
the IHHC1 interrupt
HHSC2, to make
the IHHC2 interrupt
Common Input
0.5µs 0.5µs 0.5µs0.5µs 10µs
VSM-28ML
10µs 10µs 10µs
Can be the input points of the positioning control's DOG, PG0, INT signals or for the handwheel.
Width / Period
measurement
X0
X1 X2
X3
X4
X5 X6
X7
56
423
50µs
10µs 10µs 10µs 10µs 10µs 10µs 10µs 10µs
2.5µs 2.5µs 2.5µs2.5µs
50µs 50µs
10µs
50µs 50µs 50µs 50µs 50µs
VS1
VS2
VSM
VS3
10µs 10µs 10µs
2.5µs 2.5µs 2.5µs2.5µs
10µs 10µs 10µs 10µs
Pulse Measurement
Positioning Control
Width / Period
measurement
Common Input is available to work with an other advanced function.
When one of the X0~X7 performs a mentioned advanced function above, this input point is not reusable with another
function. However, External Interrupt could cooperate with Pulse Measurement function. (For details, please see the
specic function description.)
When a mentioned advanced function above performs, the lter time of this input point will be automatically adjusted
to 0 ms (deviates form D9020). To prevent noise interference, input points X0~X7 are also mounted with hardware RC
lters.
Thus, the lter time of 0 ms is not true 0 ms. In addition, the response time of input points X0~X7 is varied depending
on the series of VS1, VS2, VSM or VS3.
When the lter time is adjusted to 0 ms, the minimum ON or OFF signal width of each input point is listed as follows.
Series
External Input Point
When a multi-function input point is performing an advanced function, the reaction speed of the point should be very
fast. On the other hand, the consequence is relatively sensitive (higher frequency means more sensitive), which
makes the input vulnerability to noise interference. Therefore, it's necessary to pay special attention to the external
wiring. Keep away from interference sources, or even use isolation cables.
As the adjustable input lter time, speed detection and the functions of high-speed counters have been described
above, the sections below will describe the functions of external interrupt, pulse wave capture, hardware high speed
input and pulse measurement.