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FC410 with Modbus
Operating Instructions, 02/2016, A5E33120874-AC
85
Troubleshooting/FAQs
10
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
Preliminary application inspection
Step 2
Zero point adjustment
Step 3
Measurement error calculation
Step 4
Application improvement
The guide will enable you to trace the reason for incorrect measurements and to improve the
application.