Siemens SINUMERIK 840D sl Function Manual page 522

Safety integrated

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Data descriptions

9.7 System variable

Bit 14: 1 = sign-of-life monitoring (LifeSign)

Bit 15: 1 = asynchronous fault state (StateFault)

System variable $A_FRDP_SENDMODE

The system variable is used to indicate the actual operating mode of the F-CPU of the

F_SENDDP communication partner:

1: The F-CPU is in the deactivated safety mode

0: The F-CPU is in the safety mode

For SINUMERIK 840D sl, the deactivated safety mode corresponds to the SPL commissioning

mode ($MN_PREVENT_SYNACT_LOCK == 0 or DB18.DBX36.0 == 0).

Write access operations to all named system variables are only possible from the program

saved in program file /_N_CST_DIR/_N_SAFE_SPF reserved for the SPL. Access operations

from other programs are flagged as an error with Alarm 17070.

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

Safety Integrated