ST600s | Frequency converter as pump control – Parameter list for pressure control
Note: Unchanged factory settings (except motor parameters) are assumed.
Programmed values:
| Parameter | Value | Functional description |
| P00.01 | 1 | Terminal control active |
| P00.06 | 7 | Main frequency control source = PID |
| P00.11 | 10 | Acceleration time in seconds – adjust during commissioning if necessary |
| P00.12 | 10 | Braking time in seconds – adjust during commissioning if necessary |
| P00.13 | 2 | Reverse operation blocked |
| P01.18 | 1 | Start-up protection deactivated |
| P04.00 | 4 | V/f characteristic curve quadratic |
| P05.01 | 1 | S1 = Forward command |
| P05.24 | 2 | Minimum voltage at AI1 = 2V (corresponds to 4mA) |
| P05.50 | 1 | AI1 = current input |
| P09.00 | 0 | PID setpoint source = P09.01 |
| P09.01 | PID setpoint (setting range: -100% to +100%) | |
| P09.02 | 0 | PID feedback source = AI1 |
| P09.08 | 0 | PID Deviation limit |
| Menu | – | Uploading the set parameters to control panel memory location 2 |
Italics: Factory setting, listed for illustrative
Motorparameter:
| Parameter | Value | Functional description |
| P02.01 | Nominal engine power in kW | |
| P02.02 | Nominal motor frequency in Hz | |
| P02.03 | Nominal motor speed in rpm | |
| P02.04 | Nominal motor voltage in V | |
| P02.05 | Rated motor current in A |
For a detailed explanation of the individual functions of the parameters, please consult the manual.
Pin assignment:
| Sourcetronic ST600 |
Functional description |
| R | Mains to supply or main switch |
| S | |
| T | |
| PE | |
| U | Motor directly at the FI |
| V | |
| W | |
| PE | |
| +24V | Together with COM voltage source e.g. for signal light (max. 200mA minus sensor) |
| COM | Reference potential of the +24V source |
| PW | This is the opposite pole to the potential on an active input terminal.
In factory setting connected to COM, so that a terminal is active when it is is connected to +24V |
| S1 | On: Start forward with ramp P00.11; Off: Brake with ramp P00.12 |
| AI1 | Analogue input 1 (4-20mA) |
| +10V | Analogue auxiliary voltage |
| GND | Analogue reference potential |
| RO1A, RO1B, RO1C | Relay output 1 = Inverter in operation |
| RO2A, RO2B, RO2C | Relay output 2 = Error signalling |
Commissioning
The connections R, S, T of the frequency inverter are connected to the mains directly behind the main switch, the motor in the star to the connections U, V, W of the inverter.
The pressure sensor is connected as follows:
+Ub to terminal +24V
GND to terminal AI1
In addition, a jumper from COM to GND must be set on the inverter.
The start switch is connected between S1 and +24V of the inverter. As soon as the start switch is closed or the start button on the control panel is pressed, the inverter starts PID control. If the start switch is opened or the stop button on the control panel is pressed, the inverter stops.
Relay 1 of the inverter (RO1C/RO1A) can be used to control an operating light, for example. If the internal 24V source is used for this, the lamp and pressure sensor together must not draw more than 200mA.
Relay 2 switches from RO2B/RO2C to RO2A/RO2C in case of a fault.
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