Table of contents
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
7
6.5.7 Unit ............................................................................................................................................... 84
6.5.8 Bus address ................................................................................................................................. 88
6.5.9 Device operation type .................................................................................................................. 88
6.5.10 Position of the decimal point ........................................................................................................ 90
6.5.11 Display of the zero-point adjustment ........................................................................................... 90
6.5.12 LO calibration ............................................................................................................................... 91
6.5.13 HI calibration ................................................................................................................................ 92
7 Operator control functions via PROFIBUS ............................................................................................. 95
7.1 Communications structure for PROFIBUS PA ............................................................................. 95
7.1.1 Overview ...................................................................................................................................... 95
7.1.2 Block model for collection and processing of measured values .................................................. 95
7.1.3 Pressure transducer block ........................................................................................................... 98
7.1.3.1 Pressure transducer block (transducer block 1) .......................................................................... 98
7.1.3.2 Linearization type function group ............................................................................................... 100
7.1.3.3 Units of the pressure transducer block ...................................................................................... 102
7.1.4 Electronics temperature transducer block ................................................................................. 103
7.1.5 Analog input function block ........................................................................................................ 104
7.1.6 Totalizer function block .............................................................................................................. 105
7.2 Overview of operating functions ................................................................................................. 106
7.3 Measurement ............................................................................................................................. 106
7.4 Settings ...................................................................................................................................... 107
7.4.1 Overview of settings ................................................................................................................... 107
7.4.2 Settings ...................................................................................................................................... 107
7.4.3 Pressure measurement .............................................................................................................. 107
7.4.4 Level measurement ................................................................................................................... 108
7.4.5 Flow measurement .................................................................................................................... 111
7.4.6 Adjusting to a desired process value ......................................................................................... 114
7.5 Electrical damping (filter time constant) ..................................................................................... 116
7.6 Key lock and write protection ..................................................................................................... 116
7.7 Warning and alarm limits ........................................................................................................... 117
7.8 Failure behavior ......................................................................................................................... 119
7.8.1 Overview of failure behavior ...................................................................................................... 119
7.8.2 Output ........................................................................................................................................ 119
7.8.3 Totalizer output .......................................................................................................................... 119
7.9 Diagnostics functions ................................................................................................................. 120
7.9.1 Operating hours counter ............................................................................................................ 120
7.9.2 Calibration interval and service interval ..................................................................................... 120
7.9.3 Clearing warning ........................................................................................................................ 121
7.9.4 Clearing the alarm ...................................................................................................................... 121
7.9.5 Min/max indicator ....................................................................................................................... 122
7.10 Simulation .................................................................................................................................. 123
7.10.1 Overview of simulation ............................................................................................................... 123
7.10.2 Simulating output ....................................................................................................................... 123
7.10.3 Simulating input.......................................................................................................................... 124
7.10.4 Simulating the pressure sensor .................................................................................................
124
7.10.5 Simulating sensor and electronics temperature ......................................................................... 125
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