Safe Cam Track (Sn) - Siemens SINUMERIK 840D sl Function Manual

Safety Functions Integrated in the System/Drive
6.8 Safety software cams and safety cam track (SN)
SN_Pos: Cam position:
MD 36936: $MA_SAFE_CAM_POS_PLUS[n] for 840D sl
p9536: SI motion SCA (SN) plus cam position (Control Unit) for SINAMICS S120
MD 36937: $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 (SN)

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 evaluated in
the safe programmable logic (SPL).
Further, the cams are available as SGA safe cam range bits.
Prerequisites
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 be used,
i.e. simultaneous enable in the machine data or parameters
MD 36903 $MA_SAFE_CAM_ENABLE/p9503 SI motion SCA (SN) enable
(Control Unit) and
MD 36901 $MA_SAFE_FUNCTION_ENABLE/p9501 SI motion enable safety
functions (Control Unit)
is not permissible and result in the alarm 27033/C01681 "Invalid parameteriza-
tion".
S The modulo function is not supported. If the "safe cam track" function is en-
abled and a value > 0 entered in the MD 36905 $MA_SAFE_MODULO_RAN-
GE/p9505 SI motion SCA (SN) modular value (Control Unit), then alarm 27033
"Axis %1 parameterization of the MD $MA_SAFE_REFP_STATUS_OUTPUT[0]
invalid" is output with a reference to $MA_SAFE_MODULO_RANGE.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
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05.08