Configuration
4.18 Data points
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
155
The calculation of a new mean value is then started. If the analog value remains in the
overflow or underflow range, one of the two values named is again saved as an invalid mean
value and sent when the next message is triggered.
Note
Fault suppression time > 0 configured
If you have configured an error suppression time and then enable mean value generation,
the value of the error suppression time is grayed out but no longer used. If mean value
generation is enabled, the error suppression time is set to 0 (zero) internally.
Unipolar transfer
Restrictions
Unipolar transfer cannot be configured at the same time as mean value generation. Enabling
unipolar transfer has no effect when mean value generation is activated.
Function
With unipolar transfer, negative values are corrected to zero. This can be desirable if values
from the underrange should not be transferred as real measured values.
Exception: With process data from input modules, the value -32768 / 8000
h
for wire break of
a live zero input is transferred.
With a software input, on the other hand, all values lower than zero are corrected to zero.
Fault suppression time
Requirements for the function
Configuration of the threshold trigger for this data point
Restrictions
The fault suppression time cannot be configured at the same time as mean value generation.
A configured value has no effect when mean value generation is activated.
Function
A typical use case for this parameter is the suppression of peak current values when starting
up powerful motors that would otherwise be signaled to the control center as a disruption.
The transmission of an analog value in the overflow (7FFF
h
) or underflow range (8000
h
) is
suppressed for the specified time. The value 7FFF
H
or 8000
H
is only sent after the fault
suppression time has elapsed, if it is still pending.
If the value returns to the measuring range before the fault suppression time elapses, the
current value is transferred.
