Siemens SINUMERIK 840D Description Of Functions page 381

11.03
Case 1: Mixed mode standard I/Os and SI I/Os
Generally, multiple assignments may be made for NCK inputs, i.e. the input can
be used both as a standard input with an assignment to $A_IN[n] (assignment
in machine data MD 10366), as an input for Safety Integrated level I (axial
assignment in the machine data MD 36970 ... 36978) and also as an input for
Safety Integrated level II (assignment in machine date MD 10390).
However, multiple assignment only makes sense in particular cases. There is
no restriction when assigning hardware to the NCK inputs.
The situation is different for the NCK output devices:
If an NCK output of a sub-module (output word) is assigned for the Safety
Integrated function (Level I : MD 36980 to MD 36990 or Level II : MD 10392),
then the outputs of this sub-module can no longer be used as standard output
(MD 10368). This means that only wordwise mixed mode (per sub-module) is
possible between the standard output devices and SI output devices.
Case 2: Mixed mode SI I/Os (without SPL) and SI I/Os (with SPL)
As described above, NCK inputs can be assigned a multiple number of times,
i.e. the input or its image can be used both for an assignment in the axial
machine data (MD 36970 ... MD 36978) and for the SPL I/Os (MD 10390).
For the NCK outputs, bytewise mixed operation is possible. This means that if a
byte of the sub-module is defined as SPL output (MD 10392), then the output
signals on the second sub-module can be used for an assignment in the axial
machine data (MD 36980 ... MD 36990). This is particularly recommended in
conjunction with the signal "Pulses enabled" (MD 36986) so that there is no
need to make an entry for the logic for this signal.
7.3.5 EMERGENCY STOP
A contactless EMERGENCY STOP function is implemented with the SPL with
Description
the same level of safety as for an EMERGENCY STOP function implemented
using contacts (in the Foreword to DIN EN 60204-1). Terminal 48 then no
longer has to be connected.
Terminals 64 and 63 are permanently connected to 24V (terminal 9). Terminal
48 must be isolated from the 24V supply using a leading contact of the main
switch.
The line contactor can be switched (if required) in the SPL after the drive pulses
have been cancelled. It does not have to be implemented using two channels
(e.g. only by the PLC).
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
7 Configuring example
7.3 Safety Integrated with SPL
7-381