Revision 1.0 SMV800 Modbus User's Guide Page xi
3. COMMUNICATION .................................................................... 105
3.1 SMV800 Modbus Communication .............................................................. 105
3.2 Modbus Communication Overview ............................................................ 105
3.2.1. Physical Layer Requirements ............................................................................ 105
3.2.2. Data Format ...................................................................................................... 105
3.2.3. Baud Rate (Software Configurable) ................................................................... 106
3.2.4. Modbus data Types ........................................................................................... 107
3.2.5. Modbus function codes ...................................................................................... 107
3.2.7. Registers for process variables ......................................................................... 110
3.2.8. Floating point formats ........................................................................................ 111
3.2.9. Communications ................................................................................................ 111
3.2.10. Implementing calibration .................................................................................... 112
3.2.11. Diagnostics ........................................................................................................ 113
3.2.12. Transmitter register maps .................................................................................. 128
4. OPERATION AND MAINTENANCE .......................................... 173
4.1 Calibration .................................................................................................... 173
4.1.1. Differential Pressure sensor calibration ............................................................. 174
4.1.2. Static Pressure Calibration ................................................................................ 177
4.1.3. Process temperature sensor calibration ............................................................ 180
4.1.4. Dual / Triple Calibration ..................................................................................... 184
4.1.5. Simulate Device Variables ................................................................................. 185
5. TROUBLESHOOTING ............................................................... 186
5.1 Overview ....................................................................................................... 186
5.2 Communications troubleshooting ............................................................. 186
5.2.1. Device not visible on the network ...................................................................... 186
5.3 Alarms and conditions ................................................................................ 188
5.3.1. Below table shows all alarms and condition for SMV800 Modbus device. ........ 188
6. SECURITY ................................................................................. 206
6.1 Security Guidelines ..................................................................................... 206
6.2 How to report a security vulnerability ....................................................... 206
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