Connecting I/O Via Profisafe; Function Description - Siemens SINUMERIK 840D sl Function Manual

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Connecting sensors and actuators

8.2 Connecting I/O via PROFIsafe

Processing the NCK-SGA for 840D sl (multiple assignment)

Axis-specific/spindle-specific machine data is used to define which SGA from which axis/

spindle must be assigned to which NCK-SPL input. It is possible to implement a multiple

assignment (SGA from several axes are assigned to 1 input) provided that certain axes/

spindles belong to the same safety group. The SGAs are then ANDed and the result output at

the NCK-SPL input. In addition, when an NCK output is selected via an MD, it is also possible

to define whether the signal is to be output in an inverted form before it is ANDed.

Axes 1, 2 and 3 belong to one safety area. For these axes, the message "axis safely

referenced" should be output at one NCK-SPL input (INSI) (this means that the message is

output at the input if the message (signal) is present for all 3 axes).

The machine data must be parameterized as follows:

Axis 1: MD36987 $MA_SAFE_REFP_STATUS_OUTPUT = INSI x

Axis 2: MD36987 $MA_SAFE_REFP_STATUS_OUTPUT = INSI x

Axis 3: MD36987 $MA_SAFE_REFP_STATUS_OUTPUT = INSI x

Connecting I/O via PROFIsafe

The failsafe master (F-master) integrated in SINUMERIK 840D sl in conjunction with failsafe

I/O modules (F-modules), permits failsafe communication as specified according to the

PROFIsafe profile both on PROFIBUS DP as well as on PROFINET IO (PROFIsafe

communication).

This means that the safety-related input/output signals of the process (machine) are coupled

to the Safety Integrated function "safe programmable logic" (SPL) in the same way for both

the PLC and NCK-SPL via the particular I/O bus . Failsafe I/O devices can be connected via

all I/O connections.

Multiple assignment for NCK-SGA

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

Safety Integrated