Lenze 4800 - Page 97

Configuration
7-6
48XX/49XXSHB0399
7.1.1.6 Acceleration and deceleration times T
ir
,T
if
Each acceleration or deceleration time refers to a speed change from 0 to n
max
(C011). The times T
ir
and T
if
to be set can be calculated as follows:
max
0
t
ir
t
if
T
ir
T
if
t
n
[rp m ]
n
n
n
2
1
T = t
ir ir
n
n - n
2 1
max
T = t
if if
n
n - n
2 1
max
act
4900Str030
FIG 7-3 Calculation of acceleration and deceleration time
Here t
ir
and t
if
correspond to the times desired for the change from n
1
to n
2
and
vice versa.
The times T
ir
and T
if
calculated are setting values for the controller.
( Acceleration and deceleration time C012 and C013
The ramp function generator of the main set-value (n
set
or JOG set-value)is set via
the times T
ir
and T
if
under C012 and C013.
( Additonal acceleration and deceleration times
Alternaltively to the acceleration and deceleration times under C012 and C013,
additional T
ir
and T
if
times can be retrieved from the memory, for instance, to
change the drive acceleration from a certain speed on.
Programming of additional acceleration and deceleration times
Set the additional T
i
times in two steps. The selection under C100 is valid for a pair
of acceleration and deceleration times:
( Select additional acceleration/deceleration times under C100.
( Enter the required acceleration time under C101, and the deceleration time
under C103.
For several additional T
i
times repeat these two steps as often as required.
A maximum of 15 additional acceleration and deceleration times can be
programmed.
Show/Hide Bookmarks