Siemens Sinumerik 840D sl Function Manual page 100

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 agreement
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 standstill position did not correspond with the
actual position and the control cancelled the user agreement.
-- after parking an axis/spindle
(only if the change in position is greater than that defined using MD36944
$MA_SAFE_REFP_POS_TOL tolerance actual value comparison
(referencing)).
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) - - 10.2015 Edition
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