Siemens SIPROTEC 7SA522 Manual page 10

Table of contents
2.5.2 Structure of a PROFIBUS-DP telegram with event list ......................................................... 40
2.5.2.1 Telegram in input direction ................................................................................................... 40
2.5.2.2 Telegram in output direction ................................................................................................. 42
2.5.3 Handshake mechanism ........................................................................................................ 43
3 Data type definitions.......................................................................................................................... 45
3.1 Single-point indication (SP, Input) ........................................................................................ 46
3.2 Single command (SC, Output).............................................................................................. 47
3.3 Double-point indication (DP, Input) / Double command (DC, Output) .................................. 48
3.4 Measured value (signed integer) .......................................................................................... 49
3.5 Measured value (float) .......................................................................................................... 50
3.6 Metered measurand (unsigned long).................................................................................... 51
3.7 Transformer tap change command (TC) .............................................................................. 52
3.8 Transformer tap position indication (TM) .............................................................................. 53
3.9 Message block for event list via PROFIBUS-DP .................................................................. 54
4 PROFIBUS-DP - Parameterization in DIGSI ..................................................................................... 57
4.1 Interface selection and mapping files ................................................................................... 58
4.1.1 Standard mappings 3-1 to 3-n .............................................................................................. 58
4.1.2 Compatibility with standard mappings of previous versions ................................................. 59
4.1.3 Interface selection and mapping selection in DIGSI 4.21 ..................................................... 59
4.1.4 Interface selection and mapping selection in DIGSI 4.3 or higher........................................ 63
4.2 Customization of the allocations ........................................................................................... 66
4.3 Scaling of measured values.................................................................................................. 70
4.3.1 Measurement conversion ..................................................................................................... 70
4.3.2 Number representation depending on the parameterization ................................................ 71
4.3.3 Parameterization in DIGSI .................................................................................................... 73
4.4 Time synchronization............................................................................................................ 75
4.4.1 PROFIBUS-DP master ......................................................................................................... 75
4.4.2 Parameterization in DIGSI .................................................................................................... 77
4.5 Using SFC14 and SFC15 in STEP7 ..................................................................................... 79
5 Technical data .................................................................................................................................... 83
5.1 Connection via the PSE module ........................................................................................... 84
5.2 Connection via the PSO module........................................................................................... 86
Glossary.............................................................................................................................................. 89
Index.................................................................................................................................................... 91
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SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03