Response Of Safety Integrated When The Communication Fails; Delayed Pulse Cancellation In The Event Of Communication Failure - Siemens SINUMERIK 840D sl Function Manual

Interaction with other functions

12.10 Response of Safety Integrated when the communication fails

● $MN_SAFE_SDP_ENABLE_MASK
Enable F_SENDDP connections
● $MN_SAFE_RDP_ENABLE_MASK
Enable F_RECVDP connections
● $MA_SAFE_FUNCTION_ENABLE
Enabling axis-specific SI functions
This means that the safety functionality in these systems is not activated and they behave
neutrally.
Correct operation of the general NC functionality is guaranteed (start and protection of the SPL
program does not have a disturbing effect). However, the safety functionality implemented in
the application (i.e. not within the context of the simulation) is not corrected.
Influencing the part program sequence by querying safety system variables or querying the
above-mentioned enable machine data is not changed.
Simulation, machine integration
For these systems (Windows-based with simulated PLC), the complete safety functionality
(axis motion monitoring), PROFIsafe and
F_SENDDP/F_RECVDP coupling should function just the same as in a real system.
The safety functionality can be parameterized and programmed just the same as in a real
control system. The communication mechanisms on the PLC side ensure that the PROFIsafe
and
F_SENDDP/F_RECVDP protocols are maintained. External software components can read-in
or read-out user data in/out of the PROFIsafe module adapter.
12.10 Response of Safety Integrated when the communication fails
When the communication required for the SI fails between the drive and the NCK, then both
channels cancel the pulses. Under certain circumstances, this can be delayed to enable
retraction motion.
See also
Delayed pulse cancellation in the event of communication failure (Page 758)
12.10.1

Delayed pulse cancellation in the event of communication failure

Responses integrated in the drive can also be configured using the function "extended stop
and retract" (ESR). In this case, for each axis it is defined whether:
● the axis should continue to operate with a constant speed setpoint for a parameterized time
and only then should braking be initiated (stop)
● the axis should continue to operate with a parameterized velocity for a parameterized time
and then be braked along the current limit (retract)
758
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated