HEIDENHAIN PROFIBUS-DP (DPV2) - Manual (Page 72)

Functionality in the PROFIBUS DPV2 device
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The steps below should be followed from the master when
modifying the Preset value parameters:
• Read the requested Preset value parameter and check if the
returned value meets the application requirements. If not,
proceed with the following steps.
• Write the Preset value into the individual parameter.
• Store the value in the non volatile memory by PROFIdrive
parameter 971 if the value should be valid also after the next
power on sequence.
Parameter Meaning Data type
Preset value The preset value for encoders with a
measuring range of maximum 32 bits
Integer32
Preset value 64 The preset value for encoders with a
measuring range exceeding 32 bits
Integer64
Table 38 Preset value parameters
Note: The preset function should only be used at encode
standstill
Note: The number of possible preset cycles is unlimited.
Note: If scaling is used the preset function shall be used after
the scaling function to ensure that the preset value is
entered in the current measuring unit.
Note: There is no preset activated when the preset value is
written to the encoder. The preset function is controlled
by bits in the control and status words (G1_STW and
G1_ZSW) and bit in the operating parameters. The
preset value is used when a preset is requested by bit
12 in the Control word (G1_STW).