Siemens SINUMERIK 840D sl Function Manual page 104

Basics on the Safety Functions Integrated in the System/Drive
5.4 Actual value conditioning
All safety axes are listed in the HMI display "user agreement" for which safety end
stops and/or safety cams have been activated. The following data are displayed:
S Machine–axis name
S SI position
S User acknowledgement
When does a user agreement have to be given?
A user agreement is always required if an axis/spindle is to be monitored for SE, SN.
A user agreement is only required:
– when the axis/spindle is commissioned for the first time.
– when the user intends or needs to again manually and safely reference the
axis/spindle.
– If, after Power On, the stop position did not correspond with the actual posi-
tion and the control cancelled the user agreement.
– after parking an axis/spindle
(only if the change in position is greater than that defined using MD 36944:
$MA_SAFE_REFP_POS_TOL tolerance actual value comparison (referenc-
ing) is defined).
Note
An axis/spindle must have the status User agreement = yes before the SN and SE
functions can be used.
For axes/spindles without the safety "SE" and "SN" functions, the saved stop
position position is not evaluated.
Warning
!
If the drive has not been safely referenced and a user agreement has not been
given, then the following applies:
– The "Safe software cams" and/or "Safe cam track" are active, but are not
safety–relevant.
– The "Safe software limit switches" are not active.
The user agreement can only be set by an authorized user.
The user agreement can be cancelled by the user or as a result of a function being
selected (e.g. new gear stage) or also an incorrect state (e.g. inconsistency in the
user agreement between the NC and drive). When the user agreement is can-
celled, the axis state "axis safely referenced" is always reset
(refer to Fig. 5-5 "Axis states when referencing").
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
© Siemens AG 2008 All Rights Reserved
05.08