Modbus/tcp vacon • 2724-hour support +358 (0)40 837 1150 • Email: vacon@vacon.com46. START-UP TESTOnce the option board has been installed and configured, its operation can be verified bywriting a frequency instruction and giving a run command to the frequency converter viafieldbus.6.1 Frequency Converter SettingsSelect fieldbus as the active control bus. (For more information see the Vacon NX User´sManual, section 7.3.3).6.2 Master Unit Programming1. Write a FB 'Control Word' (address: 42001) of value 1Hex2. The frequency converter is now in the RUN mode.3. Set the FB 'Speed Reference' (address:42003) value of 5000 ( = 50.00%).4. The engine is now running at a 50% speed.5. Write a 'FB Control Word' (address: 42001) value of 0Hex'6. Following this, the engine stops.