Belt Length; Number Of Belt Revolutions; Speed Detection; Design Speed - Siemens SIWAREX WT241 Manual

Communication
11.4 DR 3 Belt scale parameters
11.4.10

Belt length

The length of the conveyor belt is measured during commissioning, and entered. This is
usually twice the distance between the axes of the deflection pulleys plus the single
circumference of the pulley. The input is made in the length unit from the belt load.
Note
If the jumper is closed to protect data with verification capability, the parameter can no longer
be changed.
11.4.11

Number of belt revolutions

At least one belt revolution is required for the calibration. You can increase the number of
belt revolutions in order to increase the accuracy of the equipment.
11.4.12

Speed detection

There are three options for determining the current speed:
0 – no speed sensor present. Specification of a constant belt speed or determination of it.
1 – speed sensor at digital input DI.0
2 – external specification of belt speed from CPU (via DR19)
Note
If the jumper is closed to protect data with verification capability, the parameter can no longer
be changed.
11.4.13

Design speed

The design speed can be determined with the belt empty. To this end, the time for one or
more belt revolutions is measured, and the speed determined from this.
11.4.14

Speed correction if belt loaded

If a speed sensor is not used (speed detection = 0, see Speed detection (Page 104)), a
speed correction can be determined at a certain belt load factor (preferably the nominal load)
in addition to the design speed. A load-dependent characteristic for the speed then results
together with the design speed. This characteristic is determined by two working points:
Design speed with empty belt and a speed factor correction with a certain belt load factor.
The specification is made in % of the design speed.
104
SIWAREX WT241
Manual, 05/2015, A5E36046748A