Siemens SINAMICS G120 CU240B-2 - Page 164

Functions
7.4 Setpoint sources
Inverter with CU240B-2 and CU240E-2 Control Units
164 Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
The various fixed setpoints can be selected in two ways:
1. Direct selection:
Precisely one fixed speed setpoint is assigned to each selection signal (e.g. a digital
input). As several selection signals are selected, the associated fixed speed setpoints are
added together to from a total setpoint.
Direct selection is particularly well suited to controlling the motor using the inverter's
digital inputs.
2. Binary selection:
Precisely one fixed speed setpoint is assigned to each possible combination of selection
signals.
Binary selection should preferably be used with a central control and when linking the
inverter to a fieldbus.
Table 7- 7 Parameters for direct selection of fixed setpoints
Parameter Description
P1016 = 1 Direct selection of fixed setpoints (factory setting)
P1001 Fixed setpoint 1Factory setting: 0 rpm)
P1002 Fixed setpoint 2Factory setting: 0 rpm)
P1003 Fixed setpoint 3Factory setting: 0 rpm)
P1004 Fixed setpoint 4Factory setting: 0 rpm)
P1020 Signal source for selection of fixed setpoint 1 (factory setting: 722.3, i.e. selection
via digital input 3)
P1021 Signal source for selection of fixed setpoint 2 (factory setting: 722.4, i.e. selection
via digital input 4)
P1022 Signal source for selection of fixed setpoint 3 (factory setting: 722.5, i.e. selection
via digital input 5)
P1023 Signal source for selection of fixed setpoint 4 (factory setting: 0, i e. selection is
locked)
Table 7- 8 Function diagram of direct selection of fixed setpoints
Fixed setpoint selected
by
BICO interconnection of
selection signals
(example)
The resultant fixed setpoint corresponds to the
parameter values of …
Digital input 3 (DI 3) P1020 = 722.3 P1001
Digital input 4 (DI 4) P1021 = 722.4 P1002
Digital input 5 (DI 5) P1022 = 722.5 P1003
Digital input 6 (DI 6) P1023 = 722.6 P1004
DI 3 and DI 4 P1001 + P1002
DI 3 and DI 5 P1001 + P1003
DI 3, DI 4 and DI 5 P1001 + P1002 + P1003
DI 3, DI 4, DI 5 and DI 6 P1001 + P1002 + P1003 + P1004
You will find further information about the fixed setpoints and binary selection in function
block diagrams 3010 and 3011 in the List Manual.