Defining The Parameter Counts Per Meter (Dsqc 377) - ABB PickMaster Twin - PowerPac Applications Manual

4.3.4.1 Defining the parameter Counts Per Meter (DSQC 377)

Introduction
The Counts Per Meter system parameter is used to calibrate the conveyor encoder.
The Counts Per Meter system parameter belongs to the type DeviceNet Command,
in the topic I/O System.
xx1900000551
Calculation for Counts Per Meter
The value for the Counts Per Meter system parameter is calculated as follows:
(position1*old_counts_per_meter)/measured_meters
Value
position1
old_counts_per_meter
measured_meters
Defining Counts Per Meter
Use the following procedure to define Counts Per Meter for the conveyor encoder.
Application manual - PickMaster® Twin - PowerPac
3HAC064218-001 Revision: B
4.3.4.1 Defining the parameter Counts Per Meter (DSQC 377)
1 Put a mark on the conveyor belt, for example draw a line or attach a piece
of tape, and a mark on the side of the conveyor at the same location.
2 In the FlexPendant Program Editor, load and run the program ppacal.prg.
This sets the current position of the conveyor to zero. The value is shown
as CNV value in the Position part of the FlexPendant Jogging window.
3 Run the conveyor belt approximately 1 meter.
4 In the FlexPendant Jogging window, read the position of the conveyor. This
is position1.
5 Measure the physical distance between the two marks. This is the value
measured_meters.
6 Calculate Counts Per Meter using the read and measured values.
For example: (1010*20000)/1005 = 20099
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4 Working with PickMaster PowerPac
Description
The conveyor position after moving.
Read from FlexPendant Jogging window.
The encoder's old value.
Note
The encoders delivered from factory have a preset value.
For an IRC5 system this value is 20,000. This value can
be used to start the calibration with.
The manually measured distance in meters that the
conveyor has been moved.
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