IFM SU2020 - Output Polarity of the Switching Outputs; Low Flow Cut-Off; Flow Direction

Ultrasonic flow meter SU2020 SU8020 SU2021 SU8021 SU2621 SU8621
37
10.4.5 Output polarity of the switching outputs
The parameter [P-n] can be used to select whether the outputs are plus-switching or negative-
switching.
10.4.5.1 Parameter setting via unit keys: Output polarity
u Call up the menu [EF] > [CFG].
u Select [P-n] and set [PnP] or [nPn].
10.4.5.2 Parameter setting via IO-Link: output polarity
u Select [Parameters] > [Setup].
u Select [P-n] and set [PnP] or [nPn].
10.4.6 Low flow cut-off
With the function low flow cut-off [LFC] it is possible to suppress small volumetric flow quantities.
Volumetric flow below the LFC value is evaluated by the sensor as standstill (Q = 0).
10.4.6.1 Parameter setting via unit keys: low flow cut-off
u Call up the menu [EF] > [CFG].
u Select [LFC] and set the limit below which a flow is evaluated as standstill.
10.4.6.2 Parameter setting via IO-Link: low flow cut-off
u Select [Parameter] > [More settings] > [Flow].
u Select [LFC] and set the limit below which a flow is evaluated as standstill.
10.4.7 Flow direction
The positive flow direction can be defined by the user. This setting affects the following functions:
• consumed quantity monitoring (Ò Counting method of the totalisers/40)
• flow direction monitoring via switching signal (Ò Switching signal for flow direction/27).
An arrow with the text “flow direction” on the unit indicates the positive flow direction (factory setting).
The direction of the flow measurement can be reversed using the parameter [Fdir].
+ Flow direction in case of factory setting
- Flow direction contrary to the factory setting
10.4.7.1 Parameter setting via unit keys: flow direction
u Call up the menu [EF] > [CFG].
u Select [Fdir] and set the direction of media flow.
10.4.7.2 Parameter setting via IO-Link: flow direction
u Select [Parameter] > [More settings] > [Flow].
u Select [Fdir] and set the direction of media flow.