SIPOS SEVEN 2SA7 - Close Tightly; Rise Time; DC Brake

Y070.302/EN Page 87
Operation instructions
SIPOS SEVEN: PROFITRON, HiMod
8
Parameters and possible parameter values
8 Parameters and possible parameter values
8�6 Special parameters
8�6�7 Close tightly
If the ‘Close tightly’ function is active, closed-loop control within the end position ranges is not
possible.
If, within a end position range, the operation command in direction of this end position is canceled
or a STOP signal sent, the actuator continues its operation until either a torque-dependent cut-off
occurs or a command in the opposite direction is issued.
Even for travel-dependent cut-off mode and for control via positioner or process controller, similar to
torque-dependent cut-off mode, the internal operation command is extended until the end position
(0 % or 100 %) is reached.
Close tightly off
This setting is required, if closed-loop con-
trol is to be applied within the end position
ranges.
Close tightly is activated in the factory.
8�6�8 Rise time
The ‘Rise time’ parameter accesses the integral frequency converter. The shorter the rise time the
fastertheactuatorreachesthespeciedspeed.Thesettingoftherisetimeinuencesthemodu-
lating behavior. Longer rise times lead to higher modulating accuracy, which reduces the control
dynamics at the same time.
The setting range is, in 0,1 s increments, for
actuators of duty classes
– A and B: 0.1 s to 1 s.
– C and D: 0.1 s to 2 s.
Set to 0.5 s in the factory.
8�6�9 DC brake
A value not equal to "0 %" triggers the DC brake via the integral frequency converter. The higher the
value, the higher the DC braking current is set.
For a value of "0 %", the speed of the motor is reduced as quickly as possible to a standstill via the
frequency converter. For nearly all operation points, this is the shortest time to achieve a standstill.
We therefore recommend maintaining the default settings.
The setting range is 0 to 250 % in 1 % increments.
Set to 0 % in the factory.
Fig�: Close tightly functional principle
Close tightly
On
Off
Fig�: Rise time principle
Rise time
X,X
DC brake
X %