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PRD-0000022543 Rev. 00D Page 3 of 28
MNKS008 0.0 (4/08)
TABLE OF CONTENT
1.
INTRODUCTION.......................................................................................5
1.1.
GENERAL ..............................................................................................5
1.2.
References ............................................................................................5
1.3.
Abbreviations........................................................................................5
1.4.
Definitions .............................................................................................5
2.
PROTOCOL DETAILS .............................................................................7
2.1.
ModBus On Serial Port ........................................................................7
2.1.1.
Serial Port 1 .................................................................................7
2.1.2.
Serial Port 2 .................................................................................7
2.1.3.
Hardware interface details...........................................................8
2.1.4.
Timing considerations for RS-485 ...............................................8
2.2.
ModBus On TCP/IP...............................................................................8
3.
REGISTER MAPPINGS............................................................................9
3.1.
Input Registers .....................................................................................9
3.2.
Results/Output Registers ..................................................................10
3.3.
High Resolution Accumulators.........................................................11
3.4.
Parameter Registers...........................................................................12
3.4.1.
Spoolpiece Geometry ................................................................12
3.4.2.
Rate Calibration Factors............................................................12
4.
REGISTER USAGE ................................................................................13
4.1.
The MPU Series B Alarm Status .......................................................13
4.2.
The ModBus Protocol – Message Exchange Example...................14
4.2.1.
Modbus Read Message Example .............................................14
4.2.2.
ModBus Write Message Example .............................................15
5.
REGISTER MAPPINGS FOR THE DECA CALCULATIONS................17
5.1.
External Input Values .........................................................................17
5.2.
Mode Parameters................................................................................17
5.3.
Input Parameters ................................................................................18
5.4.
Calculation Results ............................................................................19
6.
WINDOWS COMMUNICATION SOFTWARE........................................21
6.1.
MPUCOMM Dynamic Link Library ....................................................21
6.1.1.
Installation..................................................................................21
6.1.2.
Running The Test Programs .....................................................22
6.1.3.
The Network Programmers Interface ........................................23
