Siemens COMBIMASTER Reference Manual page 26

COMBIMASTER & MICROMASTER Integrated
REFERENCE MANUAL
Parameter Function
P021 • • • •
Minimum analogue
frequency (Hz)
P022 • • • •
Maximum analogue
frequency (Hz)
P023 • • • •
Analogue input type
P024 • • • •
Analogue setpoint
addition
P027 • • • •
Skip frequency 2 (Hz) 0 – fmax**
P028 • • • •
Skip frequency 3 (Hz) 0 - fmax**
P029 • • • •
Skip frequency 4 (Hz)
Siemens plc. 1999
© | G85139-H1731-U300-D2
Range
[Default]
0-fmax** Frequency corresponding to the lowest analogue input
value, i.e. 0 V / 0 mA or 2 V / 4 mA. This can be set to a
[0.00]
higher value than P022 to give an inverse relationship
between analogue input and frequency output (see diagram
in P022).
0-fmax** Frequency corresponding to the highest analogue input
value, i.e. 10 V / 20 mA, determined by P023. This can be
[50.00]
set to a lower value than P021 to give an inverse
relationship between analogue input and frequency output.
i.e.
f
The output frequency is limited by values entered for
P012/P013.
0 - 2 Selects analogue input type according to the setting of
[2]
JP301 closed
0 = 0 V to 10 V
1 = 2 V to 10 V
2 = [2 V* to 10 V]
* The inverter will come to a controlled stop if
The motor can automatically run without a potentiometer or
voltage source connected between pins 3 and 4.
With P023=2, the motor will automatically start when V
exceeds 2 V. This equally applies to analogue and digital
control (i.e. P006 = 0 or 1).
If the inverter is not in analogue mode (P006 = 0 or 2),
0 – 2
setting this parameter to '1' causes the analogue input value
[0]
to be added.
0 = No addition.
1 = Addition of the analogue setpoint (defined by P023)
to the fixed frequency or the motor potentiometer
frequency.
2 = Scaling of digital/fixed setpoint by analogue
(P023) in the range 0 - 100%.
By selecting a combination of reversed negative fixed
frequency settings and analogue setpoint addition, it is
possible to configure the inverter for 'centre zero' operation
with a 0 - 10 V potentiometer so that the output frequency
can be 0 Hz at any position, including the centre position.
See P014.
[0.00]
See P014.
[0.00]
See P014.
0- fmax**
[0.00]
Description / Notes
P021
P022
P022
P021
V / I
jumpers JP300/JP301:
OR JP300 closed
0 mA to 20 mA
4 mA to 20 mA
4 mA* to 20 mA
V < 1 V or I < 2 mA.
input
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