Kv -300 – KEYENCE Visual KV Series User Manual
Page 323
6.3 Positioning Control
KV
-300
KV-10/80
3-299
1
6
Chapter 6 Interrupts, High-speed Counters, Positioning Control
■ Acceleration/deceleration time (ms)
Sets the time required when the start frequency accelerates to the run frequency at
startup. In the same manner, sets the deceleration time required at stop. The KV-
300 CPU controls the clock pulse frequency from the start frequency to the run
frequency within the specified time. The pulse change cycle within the acceleration
time is obtained from one of the following expressions, whichever produces the
smaller solution. However, the pulse change cycle when the start pulse is less than
500 Hz becomes 14 ms or more.
Pulse change cycle (∆t) ms = (acceleration time ms + 199) ÷ 200 x 4
or
Pulse change cycle (∆t) ms = 1000 ÷ (run frequency Hz ÷ 1000)
■ Output pulse count
Sets the positioning control rotation angle (moving distance) with the pulse count.
The KV-300 CPU outputs as many clock pulses as specified. If the output pulse
count is greater than 65535, set the pulse count separately for high-order 16 bits
and low-order 16 bits based on the following expressions.
(Output pulse count) ÷ 65536 = A (solution) … B (remainder)
A = Output pulse count (high-order 16 bits)
B = Output pulse count (low-order 16 bits)
Note: When the specified output pulse count is insufficient and does not reach the
target value, the KV-300 CPU performs triangular control.
The current pulse output value cannot be checked.
Procedure
When the positioning control function is used, the KV-300 CPU controls start, stop,
and emergency stop by turning ON/OFF the utility relays. The table below shows the
operations and assigned utility relays.
0
Run frequency
Start frequency
Relay No.
R/W
Function
Description
0500
0501
2308
2311
W
STOP
Decelerates at rising (UP) edge and stops.
2309
2312
R
RUN
Turns ON during pulse output.
W
RESET
Immediately stops when turning ON during
interrupt program.
2310
2313
W
START
Starts at rising (UP) edge.
KVNKA Chap 06.p65
08.3.11, 0:10 PM
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