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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.
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