Relationships Between A (T); Of A Positioning Operation) - Siemens SIMATIC S5 Manual

IP 266
4.3.3 Relationships Between a
In order to position to a defined target, the drive must be moved at a specific speed.
The IP 266 computes the acceleration and deceleration rates from the machine
data. The result is the basic characteristic of a positioning operation.
a
(t)
0
v
(t)
s
(t)
Accele- Constant speed
ration
Figure 4-7. Relationships Between a
The slope of the speed ramp is a measure of the acceleration rate. It is specified in
2
the unit [m/s ], and is generally obtained from the following equation:
EWA 4NEB 812 6057-02
Fundamentals of Positioning
, v and s
(t) (t) (t)
t
t
t
Decele-
ration
, v and s
(t) (t)

of a Positioning Operation)

v
a=
t
(Characteristic
(t)
4-7