ST300 | External Potentiometer – How to Connect It and Which Type Is Compatible?

For connection as an external potentiometer to terminals AI1, +10V and GND, all potentiometers with a resistance of 1kΩ to 5kΩ and a power rating of 2W are suitable. If more than one potentiometer is connected to the inverter, ensure that the 10V source is not loaded with more than 10mA in total; for example, this is ensured with two potentiometers if each has a resistance of at least 2kΩ. A diagram showing the wiring can be found in the user manual, chapter 4.

To control the target frequency via the potentiometer on AI1, the following parameter must be set:

P00.06 = 1 (frequency control mode via AI1)

The selected input must be configured for voltage measurement. AI2 can only be used as a voltage input. For AI1, the following parameter must be set:

P05.52 = 0 (AI1 = voltage input / factory setting)

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