IFM SU2020 - Page 31

Ultrasonic flow meter SU2020 SU8020 SU2021 SU8021 SU2621 SU8621
31
MEWMAW AEPASP
-120Q [% MEW]
[°C]T -40 -20 100 120 130
-130
-50
[°F]-40 -4 212 248 266-58
120100-100 0 130
4
3,8
3,5FOU=OFF
20
20,5
21,5
[mA]
FOU=On
1
2
6
cr.UL UL OL cr.OL
3
4
5
Fig.21: Characteristics of the analogue output according to the standard IEC 60947-5-7
1: Analogue signal MAW: Initial value of the measuring range
2: Measured value MEW: Final value of the measuring range
3: Detection zone ASP: Analogue start point
4: Display range AEP: Analogue end point
5: Measuring range UL: Under limit
6: Scaled measuring range cr.UL: Critical under limit
Q: Flow OL: Over limit
T: Temperature Cr.OL: Critical over limit
A negative flow value means flow against the flow direction set under [Fdir]. See Flow direction
(Ò/37).
10.3.4.1 Parameter setting via unit keys: Analogue signal
ü Standard unit of measurement is selected: [EF] > [CFG] > [uni.x].
u Go to [EF] > [OUT2] to configure output OUT2.
u Select [SEL2] and set the process value. [FLOW] or [TEMP].
u Select [ou2] and set the function: [I] (analogue signal 4...20 mA.).
u Select [ASP2] and set the measurement value at which the output signal is 4 mA.
u Select [AEP2] and set the measurement value at which the output signal is 20 mA.
The parameter settings [ASP] and [AEP] can be changed subsequently in the main menu.
10.3.4.2 Parameter setting via IO-Link: Analogue signal
ü Standard unit of measurement is selected: [Parameter] > [Basic settings] > [uni.x].
u Go to [Parameter] > [Output configuration].
u Select [SEL2] and set the process value. [FLOW] or [TEMP].
u Select [ou2] and set the function: [I] (analogue signal 4...20 mA.).
u Select [Parameter] > [Analog output2].
u Call up [flow] or [temperature].
u Select [ASP2_FLOW] or [ASP2_TEMP] and set the measurement value at which the output signal
is 4mA.
u Select [AEP2_FLOW] or [AEP2_TEMP] and set the measurement value at which the output signal
is 20mA.