Siemens SINUMERIK 840C - Manual (Page 352)

09.95 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.7 Axis-specific MD 2 (axial data 2)
Following error threshold for detecting the fixed stop (as
from SW 3)
1280*
Default value Lower input limit Upper input limit Units
1 000 0 16 000 units (MS)
1 000 0 99 999 999 (as from
SW 4.4)
units (MS)
Active on
NC Stop
Following error increase threshold for detecting the fixed stop.
This machine data is only active when MD 1804* bit 4 = 0. The signal ”Fixed stop reached” is
set when the following error has been exceeded by the value defined in MD 1280*.
Example:
MD 1280* = 500 = 0.5 mm
Traversing velocity 1000 mm/min
Servo gain factor = 1
following error 1 mm
The triggering threshold for the fixed stop reached in this example is:
1 mm + 0.5 mm = 1.5 mm
Clamping tolerance 1284*
Default value Lower input limit Upper input limit Units
100 0 16 000 units (MS)
100 0 99 999 999 (as from
SW 4.4)
units (MS)
Active on
NC Stop
Zero speed control window in fixed stop.
This data only takes effect when MD 1804*, bit 3 = 1.
If the position at which the fixed stop was triggered is exceeded by more than the tolerance
defined in MD 1284*, travel to fixed stop is aborted with an error message.
Torque compensation controller integral action time 1288*
Default value Lower input limit Upper input limit Units
0 0
1 000 000
99 999 999 (as from
SW 4.4)
ms
Active on
NC Stop
The integral action of the torque compensation controller is parameterized in the integral action
time. The integral action is deactivated if set to the default value 0 because the proportional
action (MD 1384*) already ensures an adequate static distribution of torque.
The additional integral action can produce a better distribution in multi-slave operation.
Practical values are in the region of seconds. See also MD 1812*.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–167
SINUMERIK 840C (IA)