Parking Axis - Siemens SINUMERIK 840D sl Function Manual

12.5

Parking axis

When the park state is activated (using the interface signal "parking"), then the system
automatically cancels the pulses using an external STOP A. After the park state has been
removed, the external STOP A is automatically deactivated again.
"Parking" function
When the "parking" function is selected, actual value acquisition and the position measuring
system monitoring are deactivated for an axis/spindle. The NCK actual value is frozen and
mechanical actual value changes are no longer detected. This also applies to the actual value
sensing of the two safety monitoring channels NCK and SINAMICS S120. This means that
all of the actual value-related safety motion monitoring functions (SBH, SG, n<n
SN) are ineffective.
The user can align the actual value acquisition of the safety monitoring channels after de-
selecting parking by again referencing/synchronizing to the machine position.
Parking an axis with absolute reference (SE/SN)
As a result of the fact that the actual value sensing of the two safety monitoring channels NCK
and SINAMICS S120 has been deactivated, then the absolute reference of the axis is no longer
detected in a safety-related fashion. The safety monitoring channels then respond as follows:
● Alarms 27000/C01797 are displayed "Axis no longer safely referenced"
● SGA "Axis safely referenced" cancelled on NCK and drive side
These alarms are only displayed for axes for which safety monitoring functions with absolute
reference are activated, i.e. for SE and SN. Alarms are not displayed for axes that do not have
these monitoring functions.
Machine data 36965 $MA_SAFE_PARK_ALARM_SUPPRESS can be used to suppress
Alarms 27000/C01797 until parking has been withdrawn.
Note
If "parking axis" was not requested, however "parking active" is signaled from the drive or
encoder, then Alarm 27001 is output with fine code 1025.
Note
When a drive object that has Safety Integrated Functions enabled is switched into the "Parking"
state, the Safety Integrated software responds by activating STO without generating a separate
message.
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
WARNING
Interaction with other functions
12.5 Parking axis
, SBR, SE,
x
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