Docu-No.: 0590020601-EN Rev. 1.6.0 Page 83
Appendix 5
Special KCM LWF features 5.1
5.1.3 LWF tuning for the KCM
The Pert Value shows us the noise condition of the netweight even if
the self tuning is off and the feeder is stopped. This is called net weight
quality.
Pert Value shows the signal/noise ratio in percentage to the setpoint.
Please refer to the next table to determine system performance.
5.1.4 Pert values and control response
Reasons for massflow deviation may include:
• Feeder measures the product flow and the noise (e.g. Side wind on
hopper, vibration at the scale, wiring contact, pressure and vacuum
effects)
• Reference scale measures only the product flow without the noise.
Note:
• Review sections 1.4.2, 5.1.4 and 5.1.5 for acceptable control
values.
Pert Value Control Action/Response Adaptive Gain
0-33% Very good control response 80%
33-67% Good to fair control response 50%
67-100% Fair to poor control response 20%
100-250% Very poor control action 10%
Over 250% Most likely no control
Be aware on accuracy tests the massflow results from the reference
scale and feeder can deviate.
To Next Page
Loading...
Need help?
General
