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Troubleshooting/FAQs
10.1
Diagnosing with PDM
SIMATIC PDM is a suitable tool for diagnosing the device.
You can use SIMATIC PDM to read all available parameters to a table for analyzing offline,
view online/actual process values and online/actual diagnostic information.
Requirements
The following procedure must be completed before diagnosing:
● Installation of PDM and PDM device driver
● Connection of Modbus interface.
Refer to Commissioning (Page 51).
Diagnosing with PDM
Online process values are available under menu View → Process Values.
Online diagnostic information is available under menu View → Device Status.
10.2
Troubleshooting
Incorrect and unstable measurements, especially at low flows, are typically a result of an
unstable zero point due to:
● Incorrect installation
● Bubbles in the liquid
● Vibrations/Cross talk
● Solid particles settling in the liquid
In the following a 4-step guide to troubleshooting is provided:
Step 1
Step 2
Step 3
Step 4
The guide will enable you to trace the reason for incorrect measurements and to improve the
application.
FC410 with Modbus
Operating Instructions, 02/2016, A5E33120874-AC
Preliminary application inspection
Zero point adjustment
Measurement error calculation
Application improvement
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