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

Functions
9.4 Setpoint sources
9.4.3

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.
Examples: After it has been switched on, a conveyor belt only runs with two different
velocities.
Interconnecting the fixed speeds with a main setpoint
Figure 9-15
Table 9- 18
Parameter
p1070 = 1024
p1075 = 1024
Direct or binary selection of the fixed setpoints
The converter has up to 16 different fixed setpoints. The fixed setpoints can be selected via
digital inputs or the fieldbus.
The various fixed setpoints can be selected in two ways:
1. Direct selection:
2. Binary selection:
178
Fixed speeds as setpoint source
Setting the fixed speeds as 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 converter via the digital
inputs.
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 preferred solution for a central control and connecting the
converter to a fieldbus.
Additional information about binary selection can be found in function diagram 3010 of
the List Manual.
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB