VLT ® 2000 Series After installation I Commissioning and testing When the VLT frequency converter has been connected to control signals, you may want to test the system. This following test is not suitable if you use the built-in PI controller. 1. Disconnect the motor from the VLT frequency converter. 2. Connect the VLT frequency converter to the mains. 3. Make the necessary settings such as min./max. frequency and connect the necessary control signals, possibly via PLC. c) Make a quick stop by means of disconnecting between terminal 27 and terminal 12. Example of display indication: 00,0 Hz FREQUENCY STOP 1 .
During the simulation you can see that the VLT frequency converter reacts by watching the display indications. As a minimum you must set the parameters and connect the control signals as described in chapter 1, Quick Setup. 4. Make a simulation without motor: a) Give a start signal via a contact to terminal 18. Example of display indication: If no external control has been connected, you can choose to simulate the function of the VLT frequency converter locally via the keyboard. See description at the bottom of page 31. 30,0 Hz FREQUENCY ➜ FUNCTION OK 1 . 5. Press the “Stop” key to stop the VLT frequency converter before you connect the motor. 6.
Test the whole system (repeat steps 4 and 5) with the motor connected to check the direction of rotation. b) The speed (frequency) can be changed by means of the potentiometer connected. Example of display indication: 23,7 Hz FREQUENCY ➜ FUNCTION OK 1 . I Basic settings The VLT frequency converter has been preset from the factory so that normally it will function after a few data values are recorded/changed. See Quick Setup on page 15. The factory settings of the VLT frequency converter are listed on page 105. 18 MG.20.B6.02 – VLT is a registered Danfoss trademark