Beckhoff ELX3351, Operating Manual

Page: 42 / 71

Parameterization and programming
ELX3351 42 Version: 1.3.1
Fig. 34: Zero calibration with command 0x0101 in CoE object 0xFB00:01
10. Load the scales with a reference load. This should be at least 20% of the rated load. The larger the
reference load, the better the sensor values can be calculated.
In object
0x8000:28 [
}
60] ("Reference load"), enter the load in the same unit as the rated load
( 0x8000:24 [
}
60] ).
As soon as the measured value indicates a constant value for at least 10 seconds, execute the com-
mand "0x0102" (258
dec
) on CoE object 0xFB00:01.
By means of this command the ELX3351 determines the output value for the nominal weight ("Rated
output")
Check: CoE objects FB00:02 and FB00:03 must contain "0" after execution
Fig. 35: Loading with reference load, command 0x0102 in CoE object 0xFB00:01
11. Reset: execute the command 0x0000 (0
dec
) on CoE object 0xFB00:01.
12. Set the filter to a lower stage.
Calibration according to the sensor calibration protocol (theoretical calibration)
The sensor characteristic values according to the manufacturer's certificate are communicated here directly
to the ELX3351, so that it can calculate the load.
1. Execute a CoE reset
2. Set scale factor to 1 ( 0x8000:27 [
}
60] )
3. Set gravity of earth ( 0x8000:26) [
}
60] if necessary (default: 9.806650)
4. Ste gain to ( 0x8000:21 [
}
60] ) = 1
5. Set tare to 0 ( 0x8000:22 [
}
60] )
6. Specify the nominal load of the sensor in 0x8000:24 [ } 60] (Nominal load)
7. Adopt the "Rated output" (mV/V value 0x8000:23 [
}
60] ) from the calibration protocol
8. Adopt the "Zero balance" ( 0x8000:25 [
}
60] ) from the calibration protocol