Bronkhorst Modbus slave interface - Manual (Page 3)

BRONKHORST ®
Table of contents
1 GENERAL PRODUCT INFORMATION ................................................................................................. 4
1.1 I NTRODUCTION ................................................................................................................................................ 4
1.2 M ULTIBUS TYPES .............................................................................................................................................. 4
1.3 R EFERENCES TO OTHER APPLICABLE DOCUMENTS ..................................................................................................... 5
1.3.1 Manuals and user guides: ........................................................................................................................... 5
1.3.2 Technical Drawings: .................................................................................................................................... 5
1.3.3 Software tooling: ........................................................................................................................................ 5
1.4 S HORT FORM START - UP ..................................................................................................................................... 6
2 FIELD BUS INSTALLATION ................................................................................................................. 7
2.1 G ENERAL ........................................................................................................................................................ 7
2.2 M ODBUS CONNECTOR ....................................................................................................................................... 7
2.2.1 Shielded RJ45 modular jack ......................................................................................................................... 7
2.2.2 Shielded a coded M12 connector ................................................................................................................ 8
2.3 M ODBUS C ABLES AND T- PARTS ........................................................................................................................... 9
2.3.1 RJ45 FTP cables ........................................................................................................................................... 9
2.3.2 M12 DeviceNet drop cables ...................................................................................................................... 10
2.4 T ERMINATION ................................................................................................................................................11
2.4.1 Termination resistors ................................................................................................................................ 11
2.4.2 Biasing resistors ........................................................................................................................................ 11
3 CHANGING SLAVE ADDRESS AND BAUD RATE ................................................................................ 13
3.1 V IA ROTARY SWITCHES ON THE SIDE OF THE INSTRUMENT ( IF PRESENT ) ........................................................................13
3.2 V IA RS232: F LOW F IX ......................................................................................................................................13
3.3 V IA RS232: OTHER PROGRAMS ..........................................................................................................................14
3.4 V IA MICRO - SWITCH AND LED’ S ON THE INSTRUMENT ( IF PRESENT ) .............................................................................14
3.4.1 Readout bus-address/MAC-ID and baud rate: .......................................................................................... 14
3.4.2 Change bus-address and baud rate: ......................................................................................................... 15
3.5 B Y USER INTERFACE ( IF PRESENT ) ........................................................................................................................15
4 FUNCTIONAL DESCRIPTION ............................................................................................................ 16
4.1 G ENERAL .......................................................................................................................................................16
4.2 I MPLEMENTATION CLASS ...................................................................................................................................16
4.3 R ESPONSE TIME ..............................................................................................................................................17
4.4 S UPPORTED M ODBUS FUNCTIONS .......................................................................................................................17
4.4.1 Read Holding Registers (03) ...................................................................................................................... 17
4.4.2 Write Single Register (06) ......................................................................................................................... 17
4.4.3 Write Multiple Registers (16) .................................................................................................................... 17
4.4.4 Diagnostics (08) ........................................................................................................................................ 18
4.4.5 Report Slave ID (17) .................................................................................................................................. 18
4.4.6 Available parameters ................................................................................................................................ 19
5 TROUBLESHOOTING ...................................................................................................................... 21
5.1 V ISUAL DIAGNOSTICS .......................................................................................................................................21
5.2 S TEP - BY - STEP .................................................................................................................................................21
5.3 B US DIAGNOSTICS STRING .................................................................................................................................22
6 SERVICE ........................................................................................................................................ 23
Page 3 Modbus interface 9.17.035