Athena C10 line Manual de instrucciones Pagina 3

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C O N T E N T S
1.
MODBUS PROTOCOL....................................................................................................................................6
2. MESSAGE FORMAT.......................................................................................................................................6
2.1 CHARACTERS FORMAT .................................................................................................................................7
2.2 THE ADDRESS...............................................................................................................................................7
2.3 THE FUNCTION CODE ...................................................................................................................................7
2.4 THE CRC 16 ALGORITHM ............................................................................................................................7
2.4.1 CRC 16 Flow Chart.............................................................................................................................9
2.4.2 Visual Basic Calculate CRC16 example............................................................................................10
2.5 MESSAGE SYNCHRONISATION ....................................................................................................................10
3. THE MODBUS FUNCTIONS........................................................................................................................10
3.1 READ OUTPUT STATUS (01) .......................................................................................................................10
3.2 READ INPUT STATUS (02)...........................................................................................................................11
3.3 READ OUTPUT REGISTERS (03) ..................................................................................................................11
3.4 READ INPUT REGISTERS (04)......................................................................................................................11
3.5 FORCE SINGLE COIL (05)............................................................................................................................12
3.6 PRESET SINGLE REGISTER (06)...................................................................................................................12
3.7 READ STATUS (07) .....................................................................................................................................13
3.8 FORCE MULTIPLE COILS (15) .....................................................................................................................13
3.9 PRESET MULTIPLE REGISTERS (16) ............................................................................................................14
4. ERROR MANAGEMENT..............................................................................................................................14
4.1 ERROR CODES ............................................................................................................................................15
5. MODBUS ON ATHENA CONTROLS PLATINUM® INSTRUMENTS .................................................15
5.1 SERIAL COMMUNICATIONS PARAMETERS....................................................................................................15
5.2 COMMUNICATIONS TIME.............................................................................................................................15
5.3 DATA BASE ................................................................................................................................................16
5.4 BIT ZONE....................................................................................................................................................16
5.5 WORD ZONE ...............................................................................................................................................16
5.6 ASSIGNMENT OF THE PARAMETERS AND E
2
PROM .....................................................................................17
6. ELECTRICAL CONNECTIONS ..................................................................................................................17
6.1 GENERAL DESCRIPTION..............................................................................................................................17
6.2 COMMUNICATION CABLE LAYING RECOMMENDATIONS ............................................................................18
6.3 INSTRUMENTS WITH AN RS-485 INTERFACE (2 WIRE) ................................................................................18
6.3.1 References..........................................................................................................................................19
7. C10 / M10 CONTROLLERS..........................................................................................................................19
7.1 BIT ZONE....................................................................................................................................................19
7.2 READ STATUS.............................................................................................................................................20
7.3 WORD ZONE - PAGE 1 PARAMETERS ..........................................................................................................20
7.4 WORD ZONE - PAGE 2 CONFIGURATION.....................................................................................................21
7.5 TERMINATION AND POLARISATION.............................................................................................................22
8. M300 CONTROLLER ....................................................................................................................................22
8.1 BIT ZONE ....................................................................................................................................................22
8.2 READ STATUS.............................................................................................................................................23
8.3 WORD ZONE - PAGE 1 PARAMETERS ..........................................................................................................23
8.4 WORD ZONE - PAGE 2 CONFIGURATION.....................................................................................................24
8.5 TERMINATION AND POLARISATION.............................................................................................................26
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