Limiting The Positioning Range - Siemens SINAMICS G120 Function Manual
Low-voltage inverter; basic positioner (epos) for cu250-2 control units
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3.4.3
Limiting the positioning range
Description
Positioning range for linear axes
The converter limits the positioning range of a linear axis using a software limit switch. The
converter only accepts position setpoints that lie within the software limit switches.
Figure 3-4
In addition, using its digital inputs, the converter evaluates signals from stop cams. When
passing a STOP cam, the converter responds – depending on the setting – either with a fault
or an alarm.
Fault as response
When passing the STOP cam, the inverter brakes the axis with the OFF3 ramp-down time,
switches the motor off, and reports the fault F07491 or. F07492. To switch the motor on
again, you must do the following:
● Switch the motor off (OFF1).
● Acknowledge the fault.
● Move the axis away from the STOP cam, e.g. using the jogging function.
Alarm as response
When passing the STOP cam, the converter brakes the axis with the maximum deceleration
(see Section: Limiting the traversing profile (Page 46)), maintains the axis in closed-loop
control and outputs alarm A07491 or A07492. In order to bring the axis back into the valid
traversing range, you must move the axis from the STOP cam, e.g. using the jogging
function.
Basic positioner
Function Manual, 04/2015, FW V4.7 SP3, A5E34257659B AB
Limiting the positioning range of a linear axis
Basic positioner
3.4 Commissioning
39
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