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Solitrend MMP60
Moisture scaling set incorrectly in the PLC
In the device, 0 to 20 % moisture corresponds to the current output of 0 to 20 mA or
4 to 20 mA.
‣
Enter the 0 to 20 % moisture scaling in the PLC.
Contact the PLC manufacturer
The calibration curves that are saved do not match the material
In the case of materials where the slope does not roughly correspond to a calibration curve
saved in the device, a 2-point calibration (dry and wet material sample) may be necessary in
the PLC or sensor.
‣
SD02333M Remote display - Description of operation and material calibration
Moisture value too high
In the case of coarse-grained or hydrophobic materials, water can escape directly onto the
measurement surface and therefore cause a high moisture value.
‣
Enter limit values in the PLC.
Contact the PLC manufacturer
Incorrect data processing
In the event of inaccurate data processing, check the moisture value displayed in the PLC.
1.
Connect the device to the remote display
2.
Compare the moisture value shown in the PLC with the moisture value shown on the
display
3.
For a test run, set the CS operating mode in the device
4.
After the test run, set the operating mode back to CA
Start/stop conditions are not correct
• Start condition: time in seconds or kg in the scales
• Stop condition: usually % of target weight
‣
Check the start/stop conditions in the PLC
Contact the PLC manufacturer
If the solutions described here do not rectify the problem, contact the manufacturer' s
Service Department.
Endress+Hauser
Diagnostics and troubleshooting
19
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