Endress+Hauser Prosonic S FMU90 - Backwater External Input 1; Backwater External Input 2

The "flow" menu
59
"backwater external input 1"
"backwater external input 2"
!
Note!
These parameters are only available for instruments with external limit switches
(FMU90-********B***).
These parameters are used to allocate up to 2 external limit switches to the backwater channel (e.g.
one minimum safety and one maximum safety switch). If one of these switches gives a signal, the
backwater level assumes a specified value irrespective of the current echo signal.
"input N" (N = 1 or 2)
This parameter allocates an external limit switch to the backwater channel.
Selection:
• disabled (default)
no switch allocated
• ext. digin 1
external limit switch at the terminals 71, 72, 73
• ext. digin 2
external limit switch at the terminals 74, 75, 76
• ext. digin 3
external limit switch at the terminals 77, 78, 79
• ext. digin 4
external limit switch at the terminals 80, 81, 82
"function"
This parameter determines which value the backwater level assumes if the limit switch sends a
signal.
Selection:
• off (default)
no influence on the backwater level
• Min (0%)
If the limit switch sends a signal, a backwater level value of 0% is generated.
• Max (100%)
If the limit switch sends a signal, the maximum backwater level is generated.
• hold
If the limit switch sends a signal, the backwater level is held on its current value.
• customer secific
If the limit switch sends a signal, the backwater level assumes the value as defined by the
customer in the "value" parameter.
"value"
This parameter is only available for "function" = "customer specific".
It determines which value the backwater level assumes if the limit switch sends a signal.
⇒
backw.ext. input1 L1020
input 1:
function: