Profisafe Communication Response When System Errors Occur - Siemens SINUMERIK 840D sl Function Manual

Connecting sensors and actuators
8.2 Connecting I/O via PROFIsafe
PROFIsafe components
As far as the PROFIsafe components that can be operated with a SINUMERIK 840D sl, the
following limitations apply:
● PROFIsafe components with dynamic i parameters are not supported.
● The maximum possible F-net data width for each PROFIsafe component is 96 bits.
● The value range for the F-address of PROFIsafe component is as follows: 1 - 65535
- FFFF
Axis-specific SGE/SGA
I/O (F-net data) of an F-module cannot be directly connected to axis-specific SGE/SGA. They
can only be connected in the context of the SPL that must be installed for the purpose.
PLC SPL SGE/SGA
The basic PLC program automatically connects the I/O (F-net data) of an F-module to the SPL
interface in data block DB18.
It is not possible to connect them in a PLC user program.
8.2.13

PROFIsafe communication response when system errors occur

A system error relating to PROFIsafe communication exists, if the PROFIsafe layer identifies
erroneous behavior that is not as a result of a communication error defined in the PROFIsafe
protocol, but which can only be caused by incorrect behavior of the system software or
hardware.
Driver-specific system errors:
● Asynchronous fault state (StateFault)
The NCK or PLC-PROFIsafe driver is in the fault state while the associated PROFIsafe
driver of the 2nd channel is not in a fault state.
⇒ Alarm 27257
PROFIsafe communication-specific system fault
● The SPL input/output data are not updated (SPL I/O-communication)
Data exchange between the SPL and the PROFIsafe drivers is interrupted.
⇒ Alarm 27257
● No longer any communications between the NCK and PLC
The PLC was not able to execute the OB40 request for PROFIsafe communication within
the maximum monitoring time of 50 ms.
⇒ Alarm 27253
Depending on the particular error, the cyclic processing of the PROFIsafe driver (driver-specific
error) - or the complete PROFIsafe communication (PROFIsafe communication-specific
system error) is stopped - and Alarm 27257 "PROFIsafe: %1 %2 signals system error %3
(%4)" is displayed. With the alarm, the NC start is locked and STOP D/E initiated.
Behavior regarding SPL:
210
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
or 1
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Safety Integrated