Siemens SINUMERIK 840C - Manual (Page 576)

07.97 7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
Ramp-up time 1723
Default value Lower output limit Upper output limit Units
0 0 32767 ms
Active
at once
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.
Diagnostics concentricity monitoring 1724
Default value Lower output limit Upper output limit Units
0 0 32767 –
Active
at once
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.
Scaling torque setpoint interface 1725
Default value Lower output limit Upper output limit Units
0.0 0.0 100000.0 Nm
Active
at once
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 6FC5197- AA50 7–161
SINUMERIK 840C (IA)