Sigma 980 Operating And Maintenance Manual page 8

Table of Contents
Types of Primary Devices............................................................................................................................... 109
Appendix B
Troubleshooting Measurement Errors ........................................................................................... 115
Troubleshooting Measurement Errors From Electromagnetic Fields ............................................................. 115
Appendix C
Programming Features .................................................................................................................. 117
Review All Items ............................................................................................................................................. 117
Displaying Data .............................................................................................................................................. 117
Selecting the Channel .................................................................................................................................... 117
Tabular or Graph Format................................................................................................................................ 118
Graph Manipulation ........................................................................................................................................ 119
Graphic Display Averaging ............................................................................................................................. 119
Options Features ............................................................................................................................................ 119
Setting the Time and Date.............................................................................................................................. 120
Advanced Options .......................................................................................................................................... 120
Alarms ............................................................................................................................................................ 121
Data Log ......................................................................................................................................................... 122
Logging Intervals ............................................................................................................................................ 122
Data Logging Memory Allocation Options ...................................................................................................... 123
Datalogging Configurations ............................................................................................................................ 123
Diagnostics ..................................................................................................................................................... 124
Keypad Test ................................................................................................................................................... 124
LCD Test ........................................................................................................................................................ 125
Demonstration Graph ..................................................................................................................................... 125
Velocity Analysis............................................................................................................................................. 125
Event Log ....................................................................................................................................................... 125
Set Point Sampling ......................................................................................................................................... 126
Storm Water ................................................................................................................................................... 128
Appendix D
Programming Worksheet ............................................................................................................... 129
Appendix E
SCADA-Modbus® System Guidelines ........................................................................................... 133
Introduction to SCADA - Modbus Communications........................................................................................ 133
ASCII Transmission Mode.............................................................................................................................. 133
Address Field.................................................................................................................................................. 133
Function Field ................................................................................................................................................. 134
Data Field ....................................................................................................................................................... 134
LRC Field........................................................................................................................................................ 134
Communication Parameters ........................................................................................................................... 135
User Memory Customizing ............................................................................................................................. 135
Modbus ASCII Function Codes Supported..................................................................................................... 135
Query.............................................................................................................................................................. 137
Response ....................................................................................................................................................... 138
980 Flow Meter Response Time..................................................................................................................... 138
Complications with Floating Point Values....................................................................................................... 139
Port Expanders and Protocol Converters ....................................................................................................... 140
Other Reference Material ............................................................................................................................... 140
Troubleshooting Tips ...................................................................................................................................... 140
980 SCADA-Modbus "No Response" Troubleshooting Flow Chart (1 of 5) ................................................... 143
980 SCADA-Modbus "No Response" Troubleshooting Flow Chart (2 of 5) ................................................... 144
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Table of Contents
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