Contents
Verbatim Owner's Manual v
F MODBUS Interface
F. 1 Overview ........................................................................................F-1
F. 2 General Operation ..........................................................................F-2
F.2.1 Associating a Remote Channel with a PLC Data Register ............F-2
F. 3 Connecting to the PLC Network ....................................................F-3
Electrical Connection Diagram for PLC Network Connection .....F-4
F.3.1 Before Calling Technical Service Assistance ................................F-5
F. 4 Programming for Remote Channels ............................................... F-5
F.4.1 Remote Channel Programming Overview...................................... F-5
F.4.2 Associating a Net Address with a Remote Channel .......................F-6
F. 5 General MODBUS Requirements ..................................................F-7
F. 6 PLC Address Format ......................................................................F-8
F. 7 Potential Effects of Network Communications Failures ................ F-8
F.7.1 Abbreviations and Typographic Conventions ................................F-9
F. 8 Remote Channel Status, Reading, and Writing ............................F-10
F. 9 Remote Channel Message Recording and Reviewing .................F-11
F.10 Remote Channel Configuration .................................................... F-12
F.10.1 Assigning PLC Net Addresses to Remote Channels ....................F-12
F.10.2 Remote Channel Alarm Criteria ................................................... F-13
F.10.3 Linking Remote Channels to Phone Numbers ............................. F-14
F.11 Alarm Trip Delays ........................................................................ F-14
F.12 RC Linking/Network Bridging .....................................................F-15
F.12.1 Linking Modes.............................................................................. F-15
F.12.2 Commands & Limitations ............................................................ F-15
F.13 Communications Parameters ........................................................F-17
F.13.1 Serial Port Parameters .................................................................. F-18
F.13.2 Network Parameters .....................................................................F-18
F.13.3 Timing Parameters........................................................................ F-18
F.14 Miscellaneous ...............................................................................F-19
F.15 Clear-Out Operations.................................................................... F-19
F.16 Diagnostic Readouts ..................................................................... F-20
F.17 Status, Diagnostic & Error Code Listing ......................................F-22
F.17.1 Network Status Codes ..................................................................F-22
F.17.2 Diagnostic & Communications Error Codes ...............................F-23
PLC Programming Code Table .................................................... F-25
G Cabling Diagrams
G.1 RACO VSER-01 Serial Cable Connection Diagram ..................... G-2
G.2 RACO VPPC-1 Parallel Cable Connection Diagram ................... G-3
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