Limiting The Positioning Range; Setting Limits - Siemens SINAMICS G120 Instruction Manual
Basic positioner (epos) for cu250-2 control units
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6.3
Limiting the positioning range
6.3.1
Setting limits
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 6-2
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 when passing over a STOP cam
When passing the STOP cam, the converter brakes the axis with the OFF3 ramp-down time,
switches the motor off and outputs fault F07491 or F07492.
To switch the motor on again, you must do the following:
1. Switch the motor off (OFF1).
2. Acknowledge the fault.
3. Traverse the axis away from the STOP cam, e.g. using the jogging function.
Alarm when passing over a STOP cam
The following happens when the STOP cam is passed:
1. The converter brakes the axis with maximum deceleration.
2. The converter maintains the axis in closed-loop control and reports alarm A07491 or A07492.
In order to bring the axis back into the valid traversing range, you must move the axis away from
the STOP cam, e.g. using the jogging function.
Setting the limits of the positioning range
Requirement
You have selected the "Limit" screen.
Basic positioner
Function Manual, 09/2020, FW V4.7 SP13, A5E34257659B AG
Limiting the positioning range of a linear axis
Limiting the traversing profile (Page 50)
Commissioning
6.3 Limiting the positioning range
43
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