Siemens 611-D, 840C

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.

SINUMERIK 840C (IA)