Axis States - Siemens SINUMERIK 840D sl Function Manual
Sinumerik safety integrated
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Basics on the Safety Functions Integrated in the System/Drive
5.4 Actual value conditioning
5.4.3
Axis states
"Axis not referenced" state
The axis state "axis not referenced" is reached after the power supply has been
powered-up and the drive and control system have completely booted. This state is
indicated using the axis-specific interface signal "reference point reached" as fol-
lows:
Interface signal
"Reference point reached" = "1" Axis state "Axis referenced"
"Reference point reached" = "0" Axis state "Axis not referenced"
for 840D sl
(see Fig. 5-5 "Axis states when referencing")
"Axis referenced" state
For incremental encoders, the position actual value is lost when the NC is pow-
ered-down. When the NC is powered-up, a reference point approach must be car-
ried-out. If this is executed correctly, then the axis is referenced and goes into the
"axis referenced" state (see 5-5 "Axis states when referencing").
Contrary to incremental encoders, absolute encoders do not require a reference
point approach after the NC has been powered-up. These encoders track the ab-
solute position, e.g. using a mechanical gear, both when powered-up and powered-
down. The absolute position is transferred implicitly via a serial interface when the
NC is powered-up. After the position data has been transferred and the offset
value has been taken into account, the axis also goes in the axis state "axis refer-
enced" (see Fig. 5-5 "Axis states when referencing").
This axis state "axis referenced" is indicated using the axis-specific interface signal
"reference point reached" as follows:
Interface signal
"Reference point reached" = "1" Axis state "Axis referenced"
"Reference point reached" = "0" Axis state "Axis not referenced"
for 840D sl
Reference:
5-88
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
DB31-61, DBX60.4 / DBX60.5
DB31-61, DBX60.4 / DBX60.5
/IAD/, Commissioning Manual, SINUMERIK 840D sl
© Siemens AG, 2006. All rights reserved
03.06
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