Beckhoff EL72 1-901 Series, Руководство пользователя

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Commissioning
EL72x1-901x 130 Version: 1.9
Setting the encoder mask
The maximum values for the encoder mask can be set in the Parameter tab for the Axis1_ENC encoder
settings. The EL72x1-xxxx provides a maximum of 32 bits for the encoder.
The parameter Encoder Mask (maximum encoder value) can be used to set the maximum number of
available bits. By default this is set to 0xFFFF FFFF, which corresponds to 32 bits (20 single-turn bits and 12
multi-turn bits). The calculation is based on the following equation.
The parameter Encoder Sub Mask (absolute range maximum value) indicates how many bits of the
maximum encoder value are single-turn bits. The default setting is 20 (and therefore 12 multi-turn bits). The
calculation is based on the following equation.
Further calculation example with 13 single-turn bits and 8 multi-turn bits.
Fig. 162: Setting the encoder mask
Scaling factor
The scaling factor can be changed by selecting " Axis 1_Enc " and tab Parameter in the NC (see Setting the
Scaling Factor ). The value can be calculated with the formulas specified below. The calculation is based on
the assumption that one revolution corresponds to 360°.
The number of single-turn bits is taken into account in the calculation of the scaling factor. As indicated
above, the default setting for the EL72x1-xxxx is 20 single-turn bits. This value is also used for calculating
the scaling factor. If the single-turn bit value is changed, the scaling factor must be adjusted.