Operating instructions

04/08 Application manual Positioning 39
Via parameter Acceleration 1134, the acceleration and deceleration value to be
used for homing is adjusted.
Parameter
Ramp Rise Time 1135 defines the time in which the frequency is to be
brought to the acceleration and deceleration ramp adjusted for homing. In this way,
a non-linear acceleration and deceleration (S-curve) can be obtained for homing,
and the load during acceleration and deceleration of the drive can be reduced, e.g.
in order to limit jerking. The factory setting of 0 ms causes a non-linear acceleration
and deceleration ramp. The ramp rise time is added once per acceleration or decel-
eration operation.
Parameter Settings
No. Description Min. Max. Fact. sett.
1134 Acceleration 1 u/s
2
2
31
-1 u/s
2
327 680 u/s
2
1135 Ramp Rise Time 0 ms 2000 ms 0 ms
Fast S peed
Creep Speed
/ 1132
1133
Acceleration 1134
Ramp Rise Time 1135
t
Deceleration with value
of
Acceleration 1134
4.3 Positioning Mode
Positioning mode enables precise approaching of a target in a plant. By defining
parameters such as speed, acceleration and ramp rise time, different application-
specific load points can be considered. The different positioning modes and monitor-
ing methods can be adjusted individually for each motion block. In this way, it is
possible to mix absolute and relative positioning operations. The touch-probe evalua-
tion additionally enables the definition of remaining distances via an initiator.
4.3.1 Motion block management
Different motion profiles can be configured in 32 motion blocks. A motion block con-
tains parameter entries on:
− target position / distance
− speed
− acceleration
− deceleration
− Positioning mode (absolute, relative, touch-probe (sensor), speed (endless),
combination with electronic gear)
−
number of repetitions
− next motion block
− digital signal for logic links and communication interface
Application manual Positioning 3904/08