Siemens SINUMERIK 840D Description Of Functions page 413
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11.03
7.4 Safety Integrated without SPL
Contrary to Safety Integrated with SPL, here the program (S7 PLC program)
must be emulated for the NCK using switches and contactors. This has an
impact on the costs associated with the cabinet wiring, and, depending on the
complexity of the machine, is complicated. In addition, the EMERGENCY
STOP buttons and the door switches must be evaluated by safety contactors
which themselves influence the drives of the 611 digital group.
Safety Integrated without SPL
Switches, light barriers,
indicator lamps, etc.
Combinational logic with
switches and contactors
NCK I/Os
1 2 3 4
SGE input
signals
Machine data
NCK SGA/
SGE signals
Fig. 7-21
Function schematic of SI without SPL
7.4.1
Connecting-up the drives
The drives are connected-up exactly in the same way as for the version with
SPL. Pulse enable (terminal 663) and the checkback status of the pulses
(AS1/AS2) are assigned to the NCK-SGE via machine data.
X axis:
36986 SAFE-PULSE_ENABLE_OUTPUT
36976 SAFE_PULSE_STATUS_INPUT
Z axis:
36986 SAFE-PULSE-ENABLE_OUTPUT
36976 SAFE_PULSE_STATUS_INPUT
Spindle C:
36986 SAFE-PULSE-ENABLE_OUTPUT
36976 SAFE_PULSE_STATUS_INPUT
Power can be supplied to terminal AS1 either from terminal 9 or an external
+24 V power supply, depending on the cabinet configuration.
On the PLC side, the pulses must be enabled on the axis-specific drive
interface (DB3x.DBX21.7).
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
5
6
7
8
SGA output
$A_INSE input
signals
variables SPL
$A_OUTSI
input
variables SPL
7 Configuring example
7.4 Safety Integrated without SPL
Safety Integrated with SPL
Switches, light barriers,
indicator lamps, etc.
NCK I/Os
1 2 3 4
5
6
7
8
$A_OUTSE
input variables SPL
Machine data
NCK-SPL
Machine data
$A_INSI
output
variables SPL
NCK SGA/
SGE signals
BEI2_02.DSF
: 01040203H
: 01040107H
: 01040203H
: 01040107H
: 01040204H
: 01040108H
7-413
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