Integrated Synchronous Servo Drives
HBI 22xx / HBI 26xx / HBI 32xx / HBI 37xx
Operating Manual Rev. 1.6
www.engelantriebe.de
page 24
4.4
Additional functions
4.4.1 External torque / speed limiting
All HBI drives offer the possibility of external, dynamic speed limiting or torque limiting.
The speed limiting operating mode can be used, to limit a current-controlled drive without a load to a defined speed.
Without limiting, the drive would accelerate out of control to its maximum possible speed.
In I/O mode the limiting is activated in the menu
OPTIMISATION / OPERATING MODE
and is based on the selected operating
mode. The specification of the external limit value takes place through the existing analogue input (or also for testing
purposes through the parameterisation program via the RS232 interface).
In CANopen
this operating mode is selected through
modes of operation
and limit values are specified through the
objects
dynamic speed limit
or
dynamic torque limit.
Torque limiting in speed control mode
In speed control mode, a limit value for the maximum torque is additionally specified to the speed setpoint specification.
In CANopen
this mode is set with
modes of operation
=
-3 and the limit value is specified with
dynamic torque limit
.
Note:
The I²t limiting for the protection of the motor remains active; in other words on triggering of the I²t limiting, the motor
current is reduced to the motor rated current and thus eventually lower than the externally specified limit.
Speed limiting in current control / torque control mode
In torque control mode, a limit value for the maximum speed is additionally specified to the current setpoint specification
.
In CANopen
this mode is set with
modes of operation
= -
4 and the limit value is specified with
dynamic speed limit.
Note
:
For the proper function of the torque control mode with speed limiting, the parameters of the
speed controller must also be set. The speed setpoint ramp must be switched off or adjusted
to the highest possible acceleration.
(
DSerV: Setpoint ramp = 30,000 [10 RPM / sec]
).
