Operating instructions

Functions
5.4 Setpoint sources
CU240S and CU240E Control Units, FW 3.2
100 Operating Instructions, 03/2009, A5E02440075B AA
5.4.4 Using the fixed frequency as a setpoint source
Frequency setpoint via fixed frequency (P1000 = 3)
The fixed frequencies are defined using parameters P1001 to P1004 and can be assigned to
the corresponding digital inputs using P1020 to P1023.
Table 5- 21 Parameters to directly select frequencies
Parameters Description
P1016 = 1 Fixed frequency mode,
defines the procedure
for selecting fixed
frequencies.
1: Direct selection
(factory setting)
2: Binary-coded
selection
P1001 = 0 Fixed frequency 1 (FF1)
(FF values in Hz)
P1002 = 5 Fixed frequency 2
((FF2)
P1003 = 10 Fixed frequency 3 (FF3)
P1004 = 15 Fixed frequency 4 (FF4)
P1020 = 722.3 FF1 selection using DI3
P1021 = 722.4 FF2 selection using DI4
P1022 = 722.5 FF3 selection using DI5
P1023 = 722.6 FF4 selection using DI6
The fixed frequency can be selected using four digital
inputs (factory setting: DI3 … DI6) and combined (e.g.
summed). The factory settings support the following
additional combinations:
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',3 
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Additional information about binary coded selection of the fixed frequencies (P1016 = 2) is
provided in function chart 3210 of the List Manual.
Table 5- 22 Example: Selecting 2 fixed frequencies using digital input 2 and digital input 3
Parameter Description
P0003 = 3 Enable expert access to parameters
P0700 = 2 Selecting the command source: Digital inputs
P0701 = 1 ON/OFF1 (DI0) - factory setting
P0702 = 12 Direction reversal (DI1) - factory setting
P0703 = 99 Enable / 'open' digital input 2 (DI2)
P0704 = 99 Enable / 'open' digital input 3 (DI3)
P0705 = 99 Enable / 'open' digital input 4 (DI4)
P1001 = 4.00 Defines fixed frequency 1 (FF1) in [Hz]
P1002 = 8.00 Defines fixed frequency 2 (FF2) in [Hz]
P1020 = r0722.2 Connect fixed frequency 1(FF1) with the status of DI2.
r0722.2 = Parameter, which displays the status of digital input 2.
P1021 = r0722.3 Connect fixed frequency 2(FF2) with the status of DI3.
r0722.3 = Parameter, which displays the status of digital input 3.