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Functions
7.4 Setpoint sources
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
199
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- 19 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- 20 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.
Summary of Contents for SINAMICS G120 CU230P-2
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