Micromod MOD: MODBUS RTU Communications Guide - Manual (Page 4)

MODBUS RTU
CONTENTS
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TABLES
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Table 1. Cable Requirements .............................................................................................................................2
Table 2. Instrument Response Times .................................................................................................................5
Table 3. Software Drivers....................................................................................................................................6
Table 4. MOD30ML and Modcell MLP Port Numbers.......................................................................................10
Table 5. Integer Conversion - Signed to Unsigned ...........................................................................................12
Table 6. MODBUS with FIX and Commander 150............................................................................................15
Table 7. MODBUS with FIX and Commander 300............................................................................................16
Table 8. MODBUS with InTouch and Commander 300 ....................................................................................17
Table 9. Wiring for RS-485 Full Duplex.............................................................................................................18
Table 10. TCP QuickPanel Addressing.............................................................................................................18
Table 11. MOD30ML and Modcell Multiloop Processor to Host Device or PC Sample Configuration Entries .20
Table 12. MODBUS Reference Information for MOD30 ML and Modcell Communications .............................21
Table 13. Wire Connections for RS-232 Devices..............................................................................................22
Table 14. Wire Connections for RS-485 (4 or 5-Wire) Devices ........................................................................22
Table 15. Wire Connections for RS-485 (2 or 3-Wire) Devices ........................................................................22
FIGURES
Page
Figure 1. RS-485 Biasing and Termination .........................................................................................................4
Figure 2. Extended and Standard MODBUS Lists ..............................................................................................8
Figure 3. Block Connections ...............................................................................................................................9
Figure 4. Module Switches ................................................................................................................................11