Machine data
2.4 Axis-specific machine data
Parameter Manual
284
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Description:
The threshold value for actual velocity monitoring is entered in this machine
data.
If the axis has at least one active encoder and if this encoder is below its
limit frequency, alarm 25030 "Actual velocity alarm limit" is triggered when
the threshold value is exceeded, and the axis is stopped.
Settings:
• For axes, a value should be selected that is 10-15 % higher than that in
MD32000 $MA_MAX_AX_VELO (maximum axis velocity).
When temperature compensation is active MD32750 $MA_TEMP_COMP_TYPE, the max-
imum axis velocity is increased by an additional factor, which is obtained
from MD32760 $MA_COMP_ADD_VELO_FACTOR (velocity increase as a result of com-
pensation). Therefore, the following should apply for the threshold value of
the velocity monitoring:
MD36200 $MA_AX_VELO_LIMIT[n] > MD32000 $MA_MAX_AX_VELO * (1,1 ... 1,15 +
MD32760 $MA_COMP_ADD_VELO_FACTOR)
• For spindles, a value should be selected for each gear stage that is 10-
15 % above MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT[n] (maximum speed of the
gear stage).
The index of the machine data has the following coding: [control parameter
set no.]: 0-5
Description: This MD defines the maximum speed setpoint in percent. 100% is the maximum
speed setpoint, this corresponds to 10 V for an analog interface or the max-
imum speed for PROFIdrive drives (manufacturer-specific adjustable parameter
in the drive, e.g. p1082 and, if applicable, p2000 for SINAMICS.
The maximum speed setpoint depends on whether there are any setpoint limita-
tions in the speed and current controller.
An alarm is output and the axis is stopped when the limit is exceeded.
The limit is to be selected so that the maximum velocity (rapid traverse) can
be reached, and an appropriate additional control margin is available.
36200 AX_VELO_LIMIT A05, A11, A04 TE3,A3,G2,S1,V1
mm/min, rev/
min
Threshold value for velocity monitoring DOUBLE NEW CONF
CTEQ
- 6 11500., 11500.,
11500., 11500....
(0./ 0.) (1.e300/ 1.e300) 2/2
36210 CTRLOUT_LIMIT EXP, A05 A3,D1,G2
% Maximum speed setpoint DOUBLE NEW CONF
CTEQ
- 1 110.0 0 200 1/1
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