Mitsubishi FX3U-20SSC-H User Manual page 70

FX -20SSC-H Positioning Block User's Manual
3U
2. Interrupt 1-speed positioning operation
(Ver. earlier than 1.10, or BFM#519, #619 b6=OFF in Ver. 1.10 or later)
If the time needed for the travel distance (target address 1) is shorter than the deceleration time, the pulse
output stops at the target address 1.
If the travel distance is zero, immediate stop occurs when interrupt input INT0 turns ON.
Speed
Trapezoidal control
Start
*1. For the relation between the time for the actual deceleration and the specified time for desired
deceleration, refer to the following.
3. 2-speed positioning operation
1) If the travel distance at the first speed is small
If the travel time is smaller than the time
operation speed does not reach the operation speed 1.
If the travel distance of the first speed is zero, the travel is at the second operation speed and travel
distance. (No error is caused.)
Speed
Trapezoidal control
Travel time < desired deceleration time
*1. For the relation between the time for the actual deceleration and the specified time for desired
deceleration, refer to the following.
64
Operation speed 1
Traveling time < desired deceleration time
Desired
Desired
decceleration
acceleration
*1
time
*1
time
Approximate
S-shaped
control
Operation
speed 1
Start
Desired
deceleration
*1
time
Approximate S-shaped control
The time to stop is slightly earlier because
deceleration under the approximate S-shaped
control is slower than that of trapezoidal control,
while the travel distance is almost the same as
that of trapezoidal control.
Target address 1
Interrupt input (INT0)
*1
needed to decelerate to the operation speed 2, the first
Operation
speed 2
*1
7 Before Starting Positioning Operation
7.10 Cautions for Positioning Operation
Time
*1
→ Refer to Section 7.2
Time
→ Refer to Section 7.2