Supplementary Conditions; Safe Programmable Logic - Siemens SINUMERIK 840D sl Function Manual

Safety integrated

Hide thumbs Also See for SINUMERIK 840D sl:

Table of Contents

Connecting sensors and actuators

Three SPL output data are considered to be contiguous. The value is changed from 101 to

110 in both SPL programs (NCK-SPL and PLC-SPL).

Values transferred from the F_SENDDP in the F-net data telegram:

Output value

Possible inter‐

mediate value

Runtime differences

Due to runtime differences in the NCK-SPL and PLC-SPL, it cannot be guaranteed that these

are sent consistently (in time) by F_SENDDP in the F-net data telegram when several SPL

output data are simultaneously changed (NCK: $A_OUTSE, PLC: $A_OUTSEP).

Supplementary conditions

For SINUMERIK 840D sl, the following restrictions apply for the safety-related CPU-CPU

communication to couple plants and systems:

● The 2 integer values, defined in the F-net data area of the F-telegram, are not used or not

evaluated by the F_SENDDP and F_RECVDP realized for SINUMERIK.

● Axis specific SGE/SGA cannot be directly coupled to F_SENDDP and F_RECVDP.

● A maximum of 250 ms can be set for the F_DP clock cycle.

● The F-net data are automatically coupled to the SPL interface in DB18 by the basic PLC

program. It is not possible to couple them in a PLC user program.

Safe programmable logic

Using safe programmable logic

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.

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

F-net data telegram

Safety Integrated