Siemens SINUMERIK 840C Installation Instructions Manual page 576

07.97
1723
Default value
0
Load test: The ramp-up time of the drive is indicated in this machine data. The ramp-up time is
the time between one 0-1 edge of the control word signal "Ramp-function generator active"
and the moment the actual speed enters the tolerance range around the setpoint speed
defined by MD 1426.
Functionality in as from SW 6
If the speed actual value does not exceed the tolerance band by the speed setpoint, the ramp-
up time is not evaluated, i.e. MD 1723=0. The ramp-up time is evaluated sensibly when the
drive is operated at the torque limit, i.e. a greater setpoint-actual value difference remains. The
setting for acceleration, MD 35200: GEAR_STEP_SPEEDCTRL_ACCEL, must be large
enough.
Note:
If, for example, the acceleration suffices to follow the setpoint ramp in the lower speed range
but not in the upper range, only the time during which the tolerance band was exceeded and
not the ramp-up time is displayed.
1724
Default value
0
Load test: When concentricity monitoring is activated, this machine data counts how often the
actual speed leaves the tolerance range around the setpoint speed defined by MD 1615. This
machine data can only be read.
1725
Default value
0.0
This machine data contains the reference value for the torque setpoints and limit values to be
transferred from the NC to the drive.
Note:
This machine data is calculated only once during power-up from Power On data.
©
Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
Ramp-up time
Lower output limit Upper output limit
0
Diagnostics concentricity monitoring
Lower output limit Upper output limit
0
Scaling torque setpoint interface
Lower output limit Upper output limit
0.0
6FC5197- AA50
7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
32767
32767
100000.0
Active
at once
Units
ms
Active
at once
Units
–
Active
at once
Units
Nm
7–161