Siemens SIMATIC PCS 7 Operating Manual page 63

HART gate
This enables HART communication with the transducers to be controlled. ON/OFF switches
HART communication on or off for the entire module, in a safety-related manner. If "Can be
switched" is set here, HART communication may be enabled or disabled on the F-channel
driver.
Interference frequency suppression
Setting interference frequency suppression for the line frequency The corresponding
integration time of the analog digital converter is displayed.
If you change this setting, the increment for the F-monitoring time and for the discrepancy
times will also change automatically. The values set there will be adjusted to the next lowest
value.
Sensor evaluation
● 1oo1 evaluation: Each channel is considered individually and the input value forwarded to
the CPU.
● 1oo2 evaluation: 2 channels are combined in all cases (0/3, 1/4, and 2/5). A discrepancy
analysis is performed on the module and the configured input value is forwarded to the
CPU. With this setting, the parameters for the discrepancy analysis can be configured.
Measuring range
The measuring ranges 0 to 20 mA and 4 to 20 mA are available for selection. With 0 to 20
mA, HART communication is not possible.
F wire-break detection
In the 4 to 20 mA measuring range and with wire-break detection activated, a message is
issued when a current of < 3.6 mA is present. If wire-break detection is deactivated, an
underflow message is issued if a current of < 0.4444 mA is present (as with the 0 to 20 mA
measuring range).
Filter
The module filters the input signal throughout the specified number of acquisition cycles.
Please note that input signal filtering will lengthen the system's reaction time.
Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB
Configuring S7F/FH hardware
6.4 Setting system parameters for F-signal modules
63