A short write-up intended to provide some guidance and hints in the process of setting up a FREQROL inverter to allow for analog speed reference input.
Herewith some support files for FR-D700 Inverter – STF & STR with Potentiometer control application (for supplementary purposes);
To use terminal 2 as an analogue speed reference control for the VSD – the following applies;
Herewith some hints and guidelines:
In order to setup the parameterization – the following PU Operating Panel – mode is to be applicable;
Pr.73 = 10 (for terminal 2)
Pr.267 = 2 (for terminal 4)
(this is assuming that you are using a voltage of 0-10Vdc.)
- For standard applications: 1kΩ ½W potentiometer
- For high frequency switching: 1kΩ 2W potentiometer
The third step would be the commissioning (and troubleshooting) phase.
After parameterization – the VFD can be set in EXT mode for testing and the required operation; (Note that the VFD needs to be set in EXT mode for this external control mode to be activated.)
- Select STF\STR
- Control Speed via Potentiometer or external controller.
The following should be seen during the test process: