Fixed Speed As Setpoint Source - Siemens SINAMICS G120 Operating Instructions Manual

8.3.5

Fixed speed as setpoint source

In many applications after switching on the motor, all that is needed is to run the motor at a
constant speed or to switch between different speeds.
Example: After it has been switched on, a conveyor belt only runs with two different
velocities.
Interconnecting the fixed speeds with a main setpoint
Figure 8-16
Table 8- 12
Parameter
p1070 = 1024
p1075 = 1024
Select direct or binary fixed setpoint
The inverter has up to 16 different fixed setpoints. The superior controller selects the
appropriate fixed setpoints via digital inputs or the field bus.
The inverter distinguishes between two methods for selecting the fixed setpoints:
1. Direct selection:
2. Binary selection:
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Fixed speeds as setpoint source
Setting the fixed speed as a setpoint source
Remark
Main setpoint
Interconnecting the main setpoint with fixed speeds.
Additional setpoint
Interconnecting the additional setpoint with fixed speeds
You set four different fixed setpoints. By adding one or more of the four fixed setpoints,
up to 16 different resulting setpoints are obtained.
Direct selection is the most suitable method for controlling the inverter via the digital
inputs.
Additional information about direct selection can be found in function diagram 3011 in the
List Manual.
You set 16 different fixed setpoints. You precisely select one of these fixed setpoints by a
combination of four selection bits.
The binary selection is the suitable method of controlling the inverter via a field bus.
Additional information about binary selection can be found in function diagram 3010 of
the List Manual.
Setting functions
8.3 Setpoints
233