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Ultrasonic flow meter
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When set to the window function, the window high [FH] and the window low [FL] are set. The
difference between FH and FL is at least 0.5% of the final value of the measuring range. FH and
FL have a fixed hysteresis of 0.25 % of the final value of the measuring range. This helps keep
the switching status of the output stable if the flow rate varies slightly.
10.3.1.1 Parameter setting via unit keys: Switching signal
ü
Standard unit of measurement is selected: [EF] > [CFG] > [uni.x].
u
Go to [EF] > [OUTx] to configure output OUTx.
u
Select [SELx] and set the process value: [FLOW] or [TEMP].
Hysteresis function:
u
Select [ou] and set the switching signal: [Hno] or [Hnc].
u
Select [SPx] and set the measured value at which the output switches.
u
Select [rPx] and set the measured value at which the output switches back.
Window function:
u
Select [ou] and set the switching signal: [Fno] or [Fnc].
u
Select [FHx] and set the upper limit of the window.
u
Select [FLx] and set the lower limit of the window.
The parameter settings for [SP], [rP], [FH] and [FL] can be changed subsequently in the main
menu.
10.3.1.2 Parameter setting via IO-Link: Switching signal
ü
Standard unit of measurement is selected: [Parameter] > [Basic settings] > [uni.x].
u
Go to [Parameter] > [Output configuration].
u
Select [SELx] and set the process value: [FLOW] or [TEMP].
Hysteresis function:
u
Select [oux] and set the switching signal: [Hno] or [Hnc].
u
Call up [Parameters] > [Digital Output x].
u
Call up [flow] or [temperature].
u
Select [SPx (FHx) - FLOW] or [SPx (FHx) - TEMP] and set the measured value at which the output
switches.
u
Select [rPx (FLx) - FLOW] or [rPx (FLx) - TEMP] and set the measured value at which the output
switches off.
Window function:
u
Select [oux] and set the switching signal: [Fno] or [Fnc].
u
Call up [Parameters] > [Digital Output x].
u
Call up [flow] or [temperature].
u
Select [SPx (FHx) - FLOW] or [SPx (FHx) - TEMP] and set the upper limit for the switching signal.
u
Select [rPx (FLx) - FLOW] or [rPx (FLx) - TEMP] and set the lower limit for the switching signal.
10.3.2 Switching signal Diagnosis
The unit features an integrated diagnostic function. When using the diagnostic function, the output is
used exclusively for diagnostic message output, which it indicates by a switched signal.
