Safe Programmable Logic (Spl); Fundamentals - Siemens Sinumerik 840D sl Function Manual

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Connecting Sensors/Actuators

7.5 Safe programmable logic (SPL)

Safe programmable logic (SPL)

Using "safe programmable logic" (outside the commissioning phase) is only

possible if at least one real axis is operated with enabled and active safety

functionality.

These signals must be logically combined (interlocked) in a safety--related, freely

programmable form in order to be able to flexibly process safety--related external

process signals and safety--related internal input and output signals. The "Safe

Programmable Logic" (SPL) handles this task as an integral system component.

S Logic operations implemented by the user are cyclically processed.

S Instructions are effective in all operating modes.

S The PLC program immediately starts to execute the instructions after the

control has booted.

S The SGE/SGA must be supplied by the machine manufacturer -- both in the

drive monitoring channel as well as in the NCK monitoring channel.

S The NCK--SPL is written as ASUB using the CNC function synchronous

actions. The PLC--SPL is written as PLC user program.

In order to check that the two SPLs (PLC and NCK) are functioning, the system

program arranges cyclic data comparison between the PLC and NCK.

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

Sinamics s120