Serial Communications Protocol Specifications - Swissvacuum.com

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- 2 - Serial communications protocol vers. 2.02 Angelantoni Industrie Spa Massa Martana (PG) Italy
- 3 - INDEX INTRODUCTION...............................................................................................................................................................................4 ERROR DETECTION.......................................................................................................................................................................5 COMMUNICATION ERRORS .........................................................................................................................................................6 IDENTIFICATION OF A DATA PACKET.........................................................................................................................................7 MODBUS FUNCTIONS....................................................................................................................................................................8 FIELDS DESCRIPTION ...................................................................................................................................................................9 MODBUS FUNCTIONS DESCRIPTION .................................................................................................................................... 10 READ MULTIPLE REGISTERS: FUNCTION CODE: 3 (DECIMALE)....................................................................... 11 WRITING FUNCTION: FUNCTION CODE: 16 (DECIMAL) ......................................................................................... 12 COMMUNICATION PARAMETERS............................................................................................................................................. 13 CODE EXAMPLES......................................................................................................................................................................... 14 C LANGUAGE .......................................................................................................................................................................... 15 VISUAL BASIC.......................................................................................................................................................................... 17 EXAMPLES OF READING AND WRITING QUERY.................................................................................................................. 18 CALCULATED CRC TABLES...................................................................................................................................................... 24 mICROPLC MEMORY LAYOUT VERS. 2.0 ............................................................................................................................... 25 READING AREA............................................................................................................................................................................. 26 PT100 MEASURES................................................................................................................................................................. 26 ANALOGIC INPUTS MEASURES ......................................................................................................................................... 26 CALCULATED INPUTS MEASURES................................................................................................................................... 26 MESSAGES .............................................................................................................................................................................. 28 USER AND REAL SETTINGS ............................................................................................................................................... 29 SETPOINTS READING........................................................................................................................................................... 32 TEST PROGRAM STATUS..................................................................................................................................................... 33 WRITING AREA.............................................................................................................................................................................. 34 NOTE ............................................................................................................................................................................................... 36 APPENDIX A: CONNECTION OF A SERIAL CABLE ......................................................................................................... 37 Figures Fig. 1 Master and Slave Pag. 3 Fig. 2: Communication overview Pag. 4 Fig. 3: Noise on the line Pag. 4 Fig. 4: Decoding a data packet Pag. 5 Fig. 5: Frame identification Pag. 7 Fig. 6 CRC calculation Pag. 12 Fig. 7: System logic layout Pag. 23 Fig. 8: Serial cable Pag. 32 Serial communications protocol vers. 2.02 Angelantoni Industrie Spa Massa Martana (PG) Italy
Page 1: - 1 - ANGELANTONI Industrie S.P.A.
Page 5 and 6: The entire task can be described as
Page 7 and 8: - 7 - 03 Illegal data value 04 Fail
Page 9 and 10: � Read Function: function code 3
Page 11 and 12: - 11 - READ MULTIPLE REGISTERS: FUN
Page 13 and 14: COMMUNICATION PARAMETERS - 13 - The
Page 15 and 16: C LANGUAGE - 15 - The following exa
Page 17 and 18: VISUAL BASIC - 17 - We assume you a
Page 19 and 20: - 19 - > Query sent: > 000: 017 001
Page 21 and 22: - 21 - > 012: 000 (0000) > 013: 000
Page 23 and 24: - 23 - > 152: 000 (0000) > 153: 000
Page 25 and 26: 0 193 129 64 1 192 128 65 0 193 129
Page 27 and 28: - 27 - ADDRESS MEANING 2032-2033 Re
Page 29 and 30: 2055.11 2055.12 2055.13 2055.14 205
Page 31 and 32: - 31 - REAL SETTINGS ADDRESS CHAMBE
Page 33 and 34: - 33 - TEST PROGRAM STATUS All info
Page 35 and 36: - 35 - 2328 Initial Segment Initial
Page 37: - 37 - APPENDIX A: CONNECTION OF A

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