Users Manual Part 2
Table Of Contents
- Contents
- 1 Preliminary note
- 2 Safety instructions
- 3 Intended use
- 4 Items supplied
- 5 Function
- 6 Mounting
- 7 Electrical connection
- 8 Parameter setting
- 9 Operation
- 10 Troubleshooting
- 10.1 Troubleshooting incorrect level readings
- 10.1.1 Level too high / too low
- 10.1.2 Measured value is stuck
- 10.1.3 Measured value drops when level close to antenna
- 10.1.4 Measured value fluctuates
- 10.1.5 Measured value is occasionally unstable
- 10.1.6 Lagging of measured value during rapid level changes
- 10.1.7 Measured value correct at 0% (4 mA) but incorrect at 100% (20 mA)
- 10.1.8 Incorrect measured value when level is above 50%
- 10.1.9 Measured value drops to zero close to tank bottom
- 10.1.10 Level measurement is lost in an empty tank
- 10.1.11 Alert mode when level close to tank bottom
- 10.1 Troubleshooting incorrect level readings
- 11 Maintenance, repair and disposal
- 12 Factory setting
- 13 Appendix
Electronic level sensor LW2720
27
u Set the parameters.
Before parameter setting, familiarise yourself with all the parameters.
u Check if the unit has accepted the parameter settings. If necessary, read the unit again.
u Check whether the unit operates correctly.
8.3 Adjustable parameters
Parameters marked with “!” (in the “Access” column) (e.g. [SSC1 Param. SP2]) are only active if
the assigned parameters have been selected.
The abbreviations SSC1 and SSC2 below refer to the switching bits (switching signal channels) in the
IO-Link process data flow. The switching signal channels are assigned to the physical outputs OUT1
and OUT2 via the parameters [ou1] and [ou2].
Parameter Options Explanation Access
uni [m] = metre
[inch] = inch
Selection of the display unit.
Reference height Setting range: 0.2...15m
Distance between unit and zero point (Ò Fig.
Reference height).
u Ensure that the reference height
corresponds to the actual tank height.
If necessary, configure a tank offset. (Ò Fig.
Tank offset)
Tank offset Setting range: -10...10m Distance between the zero point and the tank
bottom (Ò Fig. Tank offset).
Upper blind zone Setting range: 0...10m Serves to suppress false echoes, e.g. from noz-
zles
(Ò Fig. Upper blind zone).
P-n [PnP] = positive switching
[nPn] = negative switching
Output polarity for the switching outputs.
ou1 [SSC1] = configures OUT1 as switching
output. OUT1 is assigned to SSC1
(switching signal channel 1).
[OFF] = output OFF (high impedance)*
Output configuration for OUT1.
*) This does not affect the IO-Link communica-
tion.
ou2 [I] = configures OUT2 as switching output
4...20mA.
[SSC2] = configures OUT2 as switching
output. OUT2 is assigned to SSC2
(switching signal channel 2).
[OFF] = output OFF (high impedance)
Output configuration for OUT2.
dS1 Setting range: 0...60s Switch-on delay for SSC1 (switching signal
channel 1).
The switch-on delay reacts according to VD-
MA*
)
.
dr1 Setting range: 0...60s Switch-off delay for SSC1 (switching signal
channel1).
The switch-off delay reacts according to VD-
MA*
)
.
SSC1 Param. SP1 Setting range: 0.005...15m Set point1 for SSC1 (switching signal chan-
nel1).
Only available if SSC1 is not deactivated.
Set point1 must be smaller than or equal to the
set tank height [Reference height].
!
GB