7/30/2018 3:27 PM | |
Joined: 10/11/2006 Last visit: 12/5/2024 Posts: 5960 Rating: (820)
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Hello, it is a TO setting. Absolute actual value with setting absolute (measuring range > traversing range) The axis position results directly from the current actual encoder value. The traversing range must be within an encoder measuring range. This means that the zero passage of the encoder must not be located in the traversing range. When the controller is switched on, the axis position is determined from the absolute actual encoder value. Absolute actual value with setting cyclic absolute (measuring range < traversing range) The encoder supplies an absolute value within its measuring range. The controller includes the traversed measuring ranges and thus determines the correct axis position beyond the measuring range. When the controller is switched off, the traversed measuring ranges are saved in the retentive memory area of the controller. At the next power-on, the saved traversed measuring ranges are taken into account in the calculation of the actual position value. Notice: Movements of the axis while the controller is switched off can skew the actual value If the axis or the encoder is moved by more than half of the encoder measuring range while the controller is switched off, then the actual value in the controller is no longer in accord with the mechanical axis position. Page 40: https://support.industry.siemens.com/cs/ww/en/view/109749262 |
With best regards, |
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7/30/2018 4:37 PM | |
Joined: 4/4/2016 Last visit: 9/5/2021 Posts: 17 Rating: (0) |
Dear Sir, Thanks for your relpy:)! now i have a clearly concept of these stuff. but - is that ok for me to always choose "Cyclie absolute"? why we still need absolute?
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