Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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F1: Travel to fixed stop
6.2 General functionality
Basic Functions
316
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Message to PLC:
IS DB31, ... DBX62.4 ("Activate travel to fixed stop")
The
FXS
selection command can only be used in systems with digital drives (VSA, HSA, HLA).
Following condition must be observed:
MD37060 $MA_FIXED_STOP_ACKN_MASK, Bit 0 = 0
Bit 0 = 1 (waiting for PLC acknowledgement) must not be set, otherwise, an interpolator stop would be required
to acknowledge the signal, interrupting the movement.
Deselect FXS[ ]=0:
The following signal interfaces are reset:
Message to PLC:
IS DB31, ... DBX62.4 ("Activate travel to fixed stop")
The machine data:
MD37060 $MA_FIXED_STOP_ACKN_MASK
must contain the value zero for signal deselection without motion stop.
Without ramp
The torque limit is changed without taking into account the ramp if:
•
FXS
is activated with
(FXS[]=1
), to make sure that the reduction is activated immediately (especially for
synchronized actions).
• The drive needs to be de-energized as quickly as possible in the event of a fault.
Selection of FXS with G64
In the machine data:
MD37060 $MA_FIXED_STOP_ACKN_MASK
Bit 0 must be = 0 (Do not wait for PLC-input signal "Enable travel to fixed stop"), since the selection of
FXS
may
not initiate a motion stop.
Modify the torque FXST
The clamping torque can already be modified when approaching the stop.
The torque limit
FXST
acts in addition to the acceleration limitation with
ACC
.
The new torque taking into account the ramp
(MD37012 $MA_FIXED_STOP_TORQUE_RAMP_TIME)
becomes active one interpolation cycle after the change in the drive.
A change of the effective torque can be checked by reading the synchronized action variable
$VA_TORQUE[axis].