Drive functions
7.3 Function modules
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
285
● Select ramp-function generator rounding type p1134[D]
– p1134 = "0": continuous smoothing rounding is always active. Overshoots may occur.
If the setpoint changes, final rounding is carried out and then the direction of the new
setpoint is adopted.
– p1134 = "1": non-continuous smoothing changes immediately to the direction of the
new setpoint when the setpoint is changed.
● Configure ramp-function generator, deactivate rounding at zero crossing p1151[D]
● Freezing of the ramp-function generator using p1141 (not in jog mode r0046.31 = 0)
Ramp-function generator tracking
If the drive is in the area of the torque limits, the actual speed value is removed from the
speed setpoint. The ramp-function generator tracking updates the speed setpoint in line with
the actual speed value and so levels the ramp. p1145 can be used to deactivate ramp-
function generator tracking (p1145 = 0) or set the permissible following error (p1145 > 1). If
the permissible following error is reached, then the speed setpoint at the ramp-function
generator output will only be further increased in the same proportion as the actual speed
value.
Ramp-function generator tracking can be activated for the basic and the extended ramp-
function generators.
ZLWKWUDFNLQJZLWKRXWWUDFNLQJ
6SHHGDFWXDOYDOXH
6SHHGVHWSRLQW
6SHHGDFWXDOYDOXH
2XWSXWRIWKH
UDPSIXQFWLRQ
JHQHUDWRU
6SHHGVHWSRLQW
2XWSXWRIWKH
UDPSIXQFWLRQJHQHUDWRU
S
Q
WWWW
Q
Figure 7-66 Ramp-function generator tracking
Without ramp-function generator tracking
● p1145 = 0
● Drive accelerates until t2 although setpoint < actual value
With ramp-function generator tracking
● At p1145 > 1 (values between 0 and 1 are not applicable), ramp-function generator
tracking is activated when the torque limit is approached. The ramp-function generator
output thereby only exceeds the actual speed value by a deviation value that can be
defined in p1145.
● t1 and t2 almost identical
To Next Page
Loading...
