Siemens SINUMERIK 840D sl Commissioning Manual page 167
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- Function manual (2184 pages) ,
- Programming manual (1334 pages) ,
- Commissioning manual (1102 pages)
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Recalibration
Recalibration of the absolute encoder is required after:
● Gear change between load and absolute encoder
● Removal/installation of the absolute encoder (encoder replacement)
● Removal/installation of the motor with the absolute encoder (motor replacement)
● SRAM data loss of the NC, battery power failure. In this case, it is necessary to load a
● PRESET
A recalibration of the absolute encoder is also required when machine data MD34210
$MA_ENC_REFP_STATE[n] is set to zero under the following conditions:
● Alarm 25020 "Zero mark monitoring of the active encoder" has been issued.
● The control has been switched off during the consistency check.
● The encoder number has changed.
Literature
Function Manual Basic Functions; Reference point approach: Referencing with absolute
encoders
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
series startup file.
NOTICE
The status of the absolute encoder is only automatically reset to 1 = "encoder not
calibrated" by the NCK on gear change:
• MD34210 $MA_ENC_REFP_STATE[n] = 1
In all other cases, it is the sole responsibility of the NCK user to indicate the uncalibrated
state of the absolute encoder by manually resetting the status to "encoder not
calibrated" and to perform calibration again.
NCK start-up
10.5 Parameterize axis data
167
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