Festo 174335, Электронное руководство

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5. Diagnosis and error treatment
5-30
Festo P.BE-VIFB13-03-EN en 0003c
5.5.2 Siemens SIMATIC S5/S7
With these controllers, you have the option of specifying the
behaviour of the valve terminal if the following faults occur:
– controller failure
– bus interruption
– program stop
Almost all configuration programs contain the function “Re-
sponse monitoring”. For the operating modes named, the
time specified corresponds to the drop-off time of the valves
and electric outputs.
You can set two ways in which the control system reacts to
faults:
– when a fault occurs, the controller switches to the operat-
ing mode “STOP” (hard error reaction) or
– when a fault occurs, the controller switches to the operat-
ing mode “RUN” (soft error reaction).
Control system Module Meaning STOP RUN
SIMATIC S5 with
IM 308C OB23 Reaction to QVZ with direct pe-
riphery access default OB is pro-
grammed
OB24 Reaction to QVZ with periphery
access via process image default OB is pro-
grammed
OB35 Reaction to PEU
(Peripheral unclear) default OB is pro-
grammed
SIMATIC S7/M7 OB82 Reaction to a device-specific diag-
nosis default OB is pro-
grammed
OB86 Reaction to failure of a DP slave default OB is pro-
grammed
Further details can be found in the relevant manuals for the
control systems.