Siemens SINAMICS G120P, Руководство по эксплуатации

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Functions
7.3 Setpoints
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
347
7.3.4 Fixed speed as setpoint source
In many applications after switching the motor on, 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 7-12 Fixed speeds as setpoint source
Table 7- 12 Setting the fixed speed as a setpoint source
Parameter Remark
p1070 = 1024 Main setpoint
Interconnects the main setpoint with fixed speeds
p1075 = 1024 Additional setpoint
Interconnects the additional setpoint with fixed speeds
Select direct or binary fixed setpoint
The inverter has up to 16 different fixed setpoints. The higher-level controller selects the
appropriate fixed setpoints via digital inputs or the fieldbus.
The inverter distinguishes between two methods for selecting the fixed setpoints:
1.
Direct selection:
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.
2. Binary selection:
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 fieldbus.
Additional information about binary selection can be found in function diagram 3010 of
the List Manual.