International English | Simple Applications |
Overtemperature in the inverter is usually caused by a high ambient temperature, a faulty or blocked fan, or blocked air inlet or outlet.
5.8Some Additional Features
The MICROMASTER has many useful features built into the software and available for the user. Some of these are briefly described below. The manual gives details of how to select and use these features. Advanced features such as Serial Interface, Closed loop Control, Braking operation etc. are described section 8.
5.8.1Display Mode
The display normally shows the output frequency, but output current, motor speed etc. can be selected instead.
5.8.2Ramp Smoothing
The rate of change of ramp can be limited to limit ‘jerk’. The smoothing is calculated from the ramp up time, so if the ramp down time is very different smoothing will not be so effective during ramp down. Smoothing is not effective at ramp rates of less than 0.3 seconds. Smoothing has the effect that if the inverter is ramping up and a stop signal given, there will be a delay before the inverter begins to ramp down again. This effect can be optionally disabled using parameter .
Frequency
Ramping with smoothing
Normal Ramping 
Figure
5.8.3Display Scaling
The value in display can be scaled to match the process and show ‘Litres per minute’ or ‘Metres per second’ etc.
5.8.4Skip Frequencies etc.
If these frequencies are set, the inverter will not run at these output frequencies. Resonance problems can be avoided using this feature.
The bandwidth can be adjusted by setting the appropriate parameter.
MICROMASTER Applications Handbook | 25 |