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Deployment CPU iC921xM-FSoE
Response times > There is an error
5.12.2
There is an error
Possible single errors
Max. response time on error
132
On error, it is assumed that a watchdog responds and triggers the corresponding error
response. Possible causes include errors in the system, incorrect runtime information in
the documentation of the standard system or an extension of the runtime beyond the
value used in the calculation by changing the configuration of the standard system. The
total response time in the error-free case increases by the maximum duration of the
possible single errors:
■
Discrepancy error in safety SDI. Here, the discrepancy time must also be taken into
account: (TI
)
DIS
■
A single error occurs in the safety SDI. Here the possibly larger max. response time
during an error (TI
OFDT
case (TI
): (TI
WCDT
OFDT
■
Once or permanent interrupted communication between safety SDI and the safety
CPU. The FSoE watchdog time of the Safety SDI and the configured cycle time of the
PLC must be considered: (TI
■
Once or permanent interrupted communication between safety SDO and the safety
CPU or failure of the safety CPU. Here the watchdog time of the safety SDO and
acknowledge time of the safety SDO must be considered: (TO
■
A single error occurs in the safety SDO. Here the possibly larger max. response time
during an error (TO
OFDT
case (TO
): (TO
WCDT
OFDT
T
= T
+ MAX((TI
maxOF
maxNF
(TO
- TO
))
OFDT
WCDT
⮫ 'Designations'...page 135
T
Max. response time on error (max One Fault).
maxOF
T
Max. response time without errors (max No Fault).
maxNF
TI
With 2-channel evaluation discrepancy time, otherwise 0 (DIScrepancy).
DIS
TI/TO
Max. response time on error (One Fault Delay Time).
OFDT
TI/TO
Max. response time without errors (Worst Case Delay Time).
WCDT
TI/TO
Configured FSoE watchdog time (FSoE WatchDog).
FSoEWD
T
Cycle time of the safety CPU.
CL
TO
Max. acknowledgement time (Device Acknowledgement Time).
DAT
For plant design sensor and actuator run times are to be taken into account:
T
= T
+ T
maxOFSA
SensorDLY
⮫ 'Designations'...page 135
T
Max. response time on error with sensor and actuator
maxOFSA
(max One Fault SensorActuator).
T
Delay time of the sensor (Sensor DeLaY).
SensorDLY
T
Max. response time on error (max One Fault).
maxOF
T
Delay time of the actuator (Actuator DeLaY).
ActuatorDLY
) is to be considered with the max. response time in error free
- TI
)
WCDT
+ T
)
FSoEWD
CL
) is to be considered with the max. response time in error free
- TO
)
WCDT
), (TI
- TI
), (TI
DIS
OFDT
WCDT
+ T
maxOF
ActuatorDLY
+ TO
FSoEWD
+ T
), (TO
FSoEWD
CL
FSoEWD
HB700 | CPU | PMC921xEx | en | 24-04
iC9200 Series
)
DAT
+ TO
),
DAT
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