Vaisala WINDCAP WMT52 - SDI-12 Communications Protocol

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User’s Guide ______________________________________________________________________

128 __________________________________________________________________M210925EN-B

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Default Chapter3
- Table of Contents3
Chapter 1 General Information11
- About this Manual11
- ESD Protection13
- Recycling13
- Trademarks14
- License Agreement14
- Regulatory Compliance14
- Warranty15
Chapter 2 Product Overview17
- Introduction to Ultrasonic Wind Sensor WMT5217
  - Figure 1 Ultrasonic Wind Sensor WMT5217
    - Heating Function18
- Optional Software for Easy Settings18
- Ultrasonic Wind Sensor WMT52 Components19
Chapter 3 Functional Description25
- Wind Measurement Principle25
- Heating (Optional)27
  - Figure 8 Heating Control27
Chapter 4 Installation29
- Unpacking Instructions29
- Selecting the Location30
  - Figure 9 Recommended Mast Location in an Open Area30
  - Figure 10 Recommended Mast Length on Top of a Building31
- Installation Procedure32
Chapter 5 Wiring and Power Management41
- Power Supplies41
- Wiring Using the 8-Pin M12 Connector44
Chapter 645
- Wiring Using the Screw Terminals46
  - Figure 23 Screw Terminal Block46
- Data Communication Interfaces48
  - Figure 24 Data Communication Interfaces48
- Power Management49
Chapter 6 Connection Options53
- Communication Protocols53
  - Table 3 Available Serial Communication Protocols53
- Connection Cables54
  - Table 4 Connection Cable Options54
  - Installing the Driver for the USB Cable55
- Service Cable Connection56
  - Connection through M12 Bottom Connector or Screw Terminal57
  - Table 5 Default Serial Communication Settings for M12/Screw Terminal Connection57
- Communication Setting Commands58
Chapter 7 Getting the Data Messages63
- General Commands64
  - Reset (Axz)64
  - Measurement Reset (Axzm)65
- ASCII Protocol66
- SDI-12 Protocol73
- NMEA 0183 V3.0 Protocol84
Chapter 8 Sensor and Data Message Settings97
- Wind Sensor97
- Supervisor Message103
- Composite Data Message (Ar0)106
Chapter 9 Maintenance109
- Cleaning109
- Factory Calibration and Repair Service110
- Vaisala Service Centers110
Chapter 10 Troubleshooting111
- Table 9 Data Validation111
- Table 10 Communication Problems112
- Self-Diagnostics113
Chapter 11 Technical Specifications117
- Specifications117
- Options and Accessories120
  - Table 18 Options and Accessories120
- Dimensions121
  - Figure 25 WMT52 Dimensions in MM (Inch)121
  - Figure 26 Mounting Kit Dimensions in MM (Inch)122
Appendix Anetworking123
- Connecting Several Wmt52S on the same Bus123
- SDI-12 Serial Interface123
  - Wiring123
  - Communication Protocol124
- RS-485 Serial Interface124
Appendix B Sdi-12 Protocol131
- SDI-12 Electrical Interface131
Appendix C Crc-16 Computation135
- Encoding the CRC as ASCII Characters136
- NMEA 0183 V3.0 Checksum Computation136
Appendix D137
Wind Measurement Averaging Method137
- Figure 28 Wind Measurement Averaging Method138
Appendix E Factory Configurations139
Factory Configurations139
- General Unit Settings140
- Wind Configuration Settings140
  - Table 19 General Unit Settings140
  - Table 20 Wind Configuration Settings140
- Supervisor Settings141
  - Table 21 General Unit Settings141

Vaisala WINDCAP WMT52 - SDI-12 Communications Protocol

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