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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
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