Contents
1. Introduction................................................................................................................ 5
2. Physical Connection.................................................................................................. 7
2.1 Introduction................................................................................................................................................ 7
2.2 USB Interface (COM2).............................................................................................................................. 8
2.3 RS485 Interface (COM1)........................................................................................................................... 8
3.1 Introduction...............................................................................................................................................11
3.2 Cause of Transmission............................................................................................................................12
3.4 Point List.................................................................................................................................................. 14
3.4.2 Measurands............................................................................................................................... 27
4. MODBUS Definitions............................................................................................... 29
4.1 Introduction...............................................................................................................................................29
4.2.1 FLOAT_IEEE_754..................................................................................................................... 30
4.2.2 FP_32BITS_3DP....................................................................................................................... 31
4.2.3 UINT32.......................................................................................................................................31
4.2.4 UINT16.......................................................................................................................................31
4.2.5 EVENT....................................................................................................................................... 32
4.2.6 EVENTCOUNT.......................................................................................................................... 33
4.2.7 TIME_METER............................................................................................................................33
4.2.8 STR32 & STR64....................................................................................................................... 33
4.2.9 BITSTRING................................................................................................................................33
4.3 Point List.................................................................................................................................................. 35
5. DNP3 Definitions..................................................................................................... 47
5.1 Device Profile...........................................................................................................................................47
5.2 Implementation Table.............................................................................................................................. 50
5.3 Point List.................................................................................................................................................. 56
5.3.1 Binary Input Points.................................................................................................................... 56
5.3.2 Double Bit Input Points............................................................................................................. 61
5.3.3 Binary Output Status Points and Control Relay Output Blocks.................................................62
5.3.4 Counters.................................................................................................................................... 67
5.3.5 Analog Inputs.............................................................................................................................68
5.4 Additional Settings................................................................................................................................... 72
6. Not Applicable......................................................................................................... 73
7.1 Introduction...............................................................................................................................................75
8. Serial Modems........................................................................................................ 77
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Chapter 4 - 7SR120 · Data Communications Definitions
Chapter 4 - Page 3 of 84