Endress+Hauser Liquiline CM444 - Page 86

Operation Liquiline CM442/CM444/CM448
86 Endress+Hauser
10.5.2 Binary input configuration
Path: Menu/Setup/Inputs/Binary input x:y
1)
Function Options Info
Binary input Options
•Off
•On
Factory setting
On
Switching the input on/off
Signal type Options
• Static signal
•PFM
Factory setting
Static signal
Select the signal type.
Static signal
Use this setting to read out the position of, for example,
an on/off switch, an inductive proximity switch or a PLC
binary output.
Signal application: for measuring range switching,
acceptance of an external hold, as a cleaning trigger or
for controller activation
PFM
The PFM setting produces a pulse-frequency-modulated
signal that is subsequently available on the device as a
quasi-continuous process value.
Example: Measuring signal of a flowmeter
Signal type= "Static signal"
Signal level Options
•High
•Low
Factory setting
High
Determine which input signal levels should activate, for
example, measuring range switching or a cleaning.
High
Input signals between 11 and 30 V DC
Low
Input signals between 0 and 5 V DC
Signal type= "PFM"
Max. frequency 100.00 to 1000.00 Hz
Factory setting
1000.00 Hz
Maximum frequency of the PFM input signal
Is to equal the maximum possible upper limit of the
measuring range.
If the value selected is too small, higher frequencies will
not be detected. If the value is too large, on the other
hand, the resolution for small frequencies will be
relatively inexact.
Meas. value format Options
•#
•#.#
•#.##
• #.###
Factory setting
#.##
Specify the number of decimal places.