Siemens SINUMERIK 840D Description Of Functions page 460

8 Application examples
8.4 Safe cams at the modulo limit
Fig. 8-10
However, the OR operation is not integrated in the system and must be
implemented in the SPL or by hardwiring.
With SPL, the two cam signals are parameterized to $A_INSI variables and
logically combined in the SPL.
36988
36989
IDS=1 DO $A_MARKERSI[1] = $A_INSI[1] OR $A_INSI[2]
PLC programming is analogous to that of the NCK SPL.
UN
=
//
U
=
//
U
O
=
Without SPL, the SN1+ cam is negated and parameterized to an output. The
SN1- cam is also parameterized to a separate output.
36988
36988
8-460
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
359.5° 0°
≥
1
Modulo
correction
SN1+
>1
SN1-
Signal generation for modulo cam 2
SAFE_CAM_PLUS_OUTPUT[0]
SAFE_CAM_MINUS_OUTPUT[0]
DB3x.DBX109.0 // SN1+ inverted
DB18.DBX62.0 // $A_INSIP[1]
DB3x.DBX109.1 // SN1-
DB18.DBX62.1 // $A_INSIP[2]
DB18.DBX62.0 // $A_INSIP[1]
DB18.DBX62.1 // $A_INSIP[2]
DB18.DBX72.0 // Position detection 0 degrees
// $A_MARKERSIP[1]
SAFE_CAM_PLUS_OUTPUT[0]
SAFE_CAM_MINUS_OUTPUT[0]
0.5°
SN1+
inverted
SN1-
Position detection
0 degrees
84010101 ($A_INSI[1])
04010102 ($A_INSI[2])
81040101
01040102
© Siemens AG 2003 All Rights Reserved
11.03