6
6.6 Analog inputs
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
6.6 Analog inputs
For ”SIMODRIVE 611 universal”, there are two analog inputs for each
drive.
In the ”speed/torque setpoint” mode, the setpoint can be entered for
the following functions via these analog inputs:
Speed Speed–controlled operation (n
set
operation)
For the n
set
mode, the analog voltage at terminal 56.x/14.x and/or
terminal 24.x/20.x is used as speed setpoint.
Torque: Open–loop torque controlled operation (M
set
mode)
For the M
set
mode the analog voltage at terminal 56.x/14.x and/or
terminal 24.x/20.x is used as torque setpoint.
Open–loop torque control is used, if
– the speed controller is implemented in a higher–level control, or
– the master/slave functionality is used
Torque/power reduction (M
red
mode)
It may be necessary to reduce the maximum drive torque to protect
the machine components. The following possibilities exist:
– Permanent torque limiting
This limit function can be set via parameters P1230 or P1235
(refer to Chapter 6.1.8).
– Variable torque limiting
In this case, analog input 2 is set to M
red
mode and the analog
voltage at terminal 24.x/20.x is used to continuously reduce the
torque.
In the ”positioning” mode, a setpoint can be entered for the velocity
override via analog input 1.
Description
6 Description of the Functions
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