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Preset Adjustment Function
10 Preset Adjustment Function
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Danger of death, serious physical injury and/or damage to property
due to uncontrolled start-up of the drive system during execution of
the preset adjustment function!
‣ The relevant drive systems must be locked to prevent automatic startup
‣ It is advisable to protect the preset triggering via the F-Host by means
of additional protective measures, such as e.g. key-operated switch,
password etc.
‣ The new position must be checked after execution of the preset
function
The preset adjustment function is used to set the currently output position value to any
position value within the measuring range. The displayed position can thus be set to a
machine reference position purely electronically.
The execution of the preset adjustment function is a critical process, as the resulting
actual value jump, e.g. when using a controller, could cause uncontrolled machine
movements. The preset adjustment function may therefore only be executed when the
relevant system part is at a safe standstill.
After completion of the preset process, you must check that the position output by the
measuring system matches the position transmitted to the measuring system.
The preset adjustment function is already locked in the measuring system and can
only be activated via the variable IPAR_EN in the F-Periphery-DB DB1638. Even if all
preconditions are fulfilled from the viewpoint of the F-Host, the preset adjustment
function is only executed when the shaft of the measuring system is stationary.
However, a certain edge jitter, e.g. caused by machine vibrations, is permitted within a
certain tolerance window. This tolerance window can be set with the iParameter
Idleness tolerance Preset, see chapter "Idleness tolerance Preset" on
page 157.
Printed in the Federal Republic of Germany
© TR-Electronic GmbH 2010, All Rights Reserved
05/25/2011 TR - ECE - BA - DGB - 0079 - 03 Page 189 of 207