Notices regarding the use of inverter drives
- Accuracy of frequency reference
Offset printing machines need high speed accuracy.
The accuracy of an analog input as frequency reference is +/-0.2%.
Therefore, we recommend to use open field networks.
Ex. MODBUS®RTU(RS485), DeviceNet®, PROFIBUS®DP, CC-LINK®.
These networks can be set in 0.01Hz units for frequency reference.
- Electromagnetic noise
The inverter is generating "electromagnetic noise".
If there are some high accuracy sensors or other sensitive equipment near the inverter drive, the inverter's noise may cause some trouble or a malfunction.
Electromagnetic noise can be avoided by installing an external noise filter or using a different wiring method.
The inverter is generating "harmonics".
These harmonics sometimes cause a malfunction in other control equipment that is connected to the same power source.
Harmonics can be avoided by installing an external "reactor".
To decrease "harmonics", we recommend to install DC reactors in all our inverter models.
(NOTE: 100V input models require AC reactors.)