Safe Cam Track - Siemens Sinumerik 840D sl Function Manual

Safety functions integrated in the system/drive
6.8 Safety software cams and safety cam track (SN)
Cam_Tol: Cam tolerance
MD36940 $MA_SAFE_CAM_TOL for 840D sl
p9540 SI Motion SCA (SN) tolerance (Control Unit) for SINAMICS S120
Mod_Pos: Lower/upper modulo value:
MD36905 $MA_SAFE_MODULO_RANGE for 840D sl
p9505 SI Motion SCA (SN) modulo value (Control Unit) for SINAMICS S120
SN_Pos: Cam position:
MD36936 $MA_SAFE_CAM_POS_PLUS[n] for 840D sl
p9536 SI Motion SCA (SN) plus cam position (Control Unit) for SINAMICS S120
MD36937 $MA_SAFE_CAM_POS_MINUS[n] for 840D sl
p9537 SI Motion SCA (SN) minus cam position (Control Unit) for SINAMICS S120
When booting, the parameterization (parameter assignments) are checked in each
monitoring channel. In the case of parameterization errors (a condition is not ful-
filled), Alarm 27033 or F01687 is output after the control has been booted.
6.8.2

Safe cam track

Description
The "safe cam track" function is used as an alternative to safe cams (refer to
Chapter 6.8.1). The user has 4 cam tracks at his disposal. Up to 15 cams can be
evaluated on a cam track. A total of 30 cams are available. The information as to
which cam of a cam track is presently active is saved in the SGA "cam range"
(4 bits for each cam track) and can together with the SGA "cam track" be evalua-
ted in the safe programmable logic (SPL).
Further, the cams are available as SGA safe cam range bits.
Preconditions
The following prerequisites apply to the "safe cam track" function:
S The axis/axes must have been safely referenced (user agreement)
S Either the "safe cams" function or the "safe cam track" function may only be
used alternatively, i.e. simultaneous enable in the machine data or parameters
MD36903 $MA_SAFE_CAM_ENABLE / p9503 SI Motion SCA (SN) enable
(Control Unit) and
MD36901 $MA_SAFE_FUNCTION_ENABLE / p9501 SI Motion enable safety
functions (Control Unit)
is not permissible and results in the alarm 27033 / C01681 "Invalid parameteri-
zation".
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
© Siemens AG 2015 All Rights Reserved
10/15