
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