B&R ACOPOSinverter P84, User Manual

Page: 228 / 405

Programming guidelines
228 ACOPOSinverter P84 User's Manual 2.10
2.8.11.12 Load measurement
Based on the information of a load sensor, this function adapts to the current [brake engaging current] (Ibr) of
the function [BRAKE LOGIC] (bLC-) . The signal from the load sensor can be assigned to an analog input (usually
a 4 - 20 mA signal) or to the encoder input, according to the type of load sensor.
Examples:
•
Measurement of the total weight of a hoisting winch and its load
• Measurement of the total weight of the elevator gear units, the cab and the counterweight.
The current [brake engaging current] (Ibr) is adjusted according to the following characteristic.
Ibr
[Pkt 2y] (CP2)
[Pkt 1y] (CP1)
[Load measure. Pkt 1X]
(LP1)
Zero load
100%
0
Signal
Load sensor
[Load measure Pt 2x]
(LP2)
This curve can represent a load sensor on an elevator gear unit for which the motor load zero occurs when the
load in the cab is not zero.