Control functions
7.2 General functions
SINAMICS V90, SIMOTICS S-1FL6
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Operating Instructions, 04/2019, A5E36037884-007
As long as the drive remains in fixed stop, the position setpoint is adjusted to the actual
position value (position setpoint = actual position value). Fixed stop monitoring and controller
enable are active.
Note
If the drive is in fixed stop, it can be referenced using the control signal "Set reference point".
If the axis leaves the position that it had at detection of the fixed stop by more than the
selected monitoring window for the fixed stop p2635, the speed setpoint is set to 0, and fault
F7484 "Fixed stop outside of the monitoring window" is triggered with the reaction OFF3
(quick stop). The monitoring window can be set using the parameter p2635 ("Fixed stop
monitoring window"). It applies to both positive and negative traversing directions and must
be selected such that it will only be triggered if the axis breaks away from the fixed stop.
Fixed stop is not reached
If the brake application point is reached without the "fixed stop reached" status being
detected, then the fault F07485 "Fixed stop is not reached" is output with fault reaction OFF1,
the torque limit is canceled and the drive cancels the traversing block.
Overview of important parameters
•
p2617[0...7]
Traversing block position
•
p2618[0...7]
Traversing block velocity
•
p2621[0...7]
Internal positioning task
•
p2634
Fixed stop maximum following error
•
p2635
Fixed stop monitoring window
For more information about the parameters above, see Section "Parameter list (Page 343)".
Example
This example shows the operating procedures when you use the "Travel to fixed stop"
function in IPos control mode.
Prerequisites:
Use a 0.4 kW low inertia motor (rated torque = 1.27 Nm)
Procedures:
1.
Set the target position of traversing block 0.
p2617[0] = 10000
2.
Configure the traversing task to be "FIXED STOP".
p2621[0] = 2
3.
Set the required torque limit. The smaller value of the internal torque limit TLM and the
overall torque limit will be the active one.
4.
Set the maximum following error by p2634 and the monitoring window by p2635.
