Table of contents
SM331;AI 8x12 Bit Getting Started Part 2: Voltage and PT100
iv Getting Started, 11/2006, A5E00264161-02
6.3 STEP 7 user program .............................................................................................................. 6-17
6.3.1 Tasks of the user program .......................................................................................................
6-17
6.3.2 Creating a user program ..........................................................................................................
6-18
7 Testing the user program........................................................................................................................
7-1
7.1 Downloading the system data and user program ......................................................................
7-1
7.2 Visualizing the sensor values.....................................................................................................
7-3
7.3 Analog value representation ......................................................................................................
7-7
7.3.1 Introduction ................................................................................................................................
7-7
7.3.2 Display of analog value of a ±5V voltage measuring transducer...............................................
7-7
7.3.3 Display of analog value of a ±10V voltage measuring transducer.............................................
7-8
7.3.4 Display of analog value of a 0-10V voltage measuring transducer............................................
7-8
7.3.5 Analog value display of a standard PT100 ................................................................................
7-9
7.3.6 Effect of the PT100 wiring on the analog value display...........................................................
7-10
8 Diagnostic interrupt.................................................................................................................................
8-1
8.1 Initiating the diagnostic interrupt ................................................................................................
8-1
8.2 General diagnostic message......................................................................................................
8-3
8.3 Channel-linked diagnostic messages ........................................................................................
8-4
8.3.1 Types of diagnostic messages...................................................................................................
8-4
8.3.2 Configuration / programming error.............................................................................................
8-4
8.3.3 Common mode error..................................................................................................................
8-4
8.3.4 Wire breakage (only for the PT100 measuring mode)...............................................................
8-5
8.3.5 Underflow ...................................................................................................................................
8-6
8.3.6 Overflow .....................................................................................................................................
8-7
9 Hardware interrupt..................................................................................................................................
9-1
9.1 Hardware interrupt .....................................................................................................................
9-1
A Appendix.................................................................................................................................................
A-1
A.1 Source code of the user program ..............................................................................................
A-1
Index................................................................................................................................................ Index-1
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