F_Dp Communication For A System Error - Siemens Sinumerik 840D sl Function Manual

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If the error response (STOP D/E), programmed when a communication error
occurs, prevents e.g. moving plant/systems into a suitable position required to
continue operation in a production plant or system, then the error response must
be re--programmed before acknowledging the NCK responses using a channel_1
reset.
Example
1. The currently programmed error response is $A_FRDP_ERR_REAC = 0
(Alarm 27350 + STOP D/E).
2. A communication error is identified and the responses Alarm 27350 + STOP
D/E initiated.
3. In order that the plant can continue to produce, the component involved should
be manually moved into a suitable position. To do this, error response
$A_FRDP_ERR_REAC must be set to 3 (no Alarm) in the user program and
then a channel_1 reset must be initiated. The alarms are then cleared and the
NCK responses reset.
4. The error response is initiated again as the communication error is still present
after the channel_1 reset. Due to the fact that the error response was re--pro-
grammed, an alarm is not initiated and no NCK interlocks due to STOP D/E are
effective. This means that the plant components can be moved.
7.4.12

F_DP communication for a system error

There is a system error, if incorrect behavior (inappropriate response) is detected,
which is not caused by a communication error described in the F_DP protocol, but
was only the result of incorrect behavior (malfunction) of the system software or
hardware.
Driver--specific system errors:
S Asynchronous fault state (StateFault)
The NCK or PLC--F_DP driver is in the fault/error state while the F_DP of the
2nd channel is not in a fault state.
=> Alarm 27355
S Sign--of--life monitoring (LifeSign)
The NCK or PLC--F_DP driver has not updated its sign--of--life.
=> Alarm 27355
S Discrepancies in the F telegram data (TelegramDiscrepancy)
NCK and PLC--F_DP drivers cyclically generate an F telegram with diversity
through 2 channels. The two F telegrams are compared before compiling the
F telegram to be sent. A discrepancy in the telegram data was identified in this
comparison.
=> Alarm 27355
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
7.4 Safety- -related CPU- -CPU communication (F_DP communication)
Connecting Sensors/Actuators
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