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User’s Guide ______________________________________________________________________
70 __________________________________________________________________ M210906EN-C
ASCII Protocol
This section presents the data commands and data message formats for
the ASCII communication protocols.
Abbreviations and Units
For changing the units, see Chapter 8, Sensor and Data Message
Settings, on page 107.
Table 6 Abbreviations and Units
Abbreviation Name Unit
Status
1
1. The letters in the status field indicate the Unit, the # character indicates invalid data.
Sn Wind speed minimum m/s, km/h, mph, knots #,M, K, S, N
Sm Wind speed average m/s, km/h, mph, knots #,M, K, S, N
Sx Wind speed maximum m/s, km/h, mph, knots #,M, K, S, N
Dn Wind direction minimum deg #, D
Dm Wind direction average deg #, D
Dx Wind direction
maximum
deg #, D
Pa Air pressure hPa, Pa, bar, mmHg,
inHg
#, H, P, B, M, I
Ta Air temperature °C, °F #, C, F
Tp Internal temperature °C, °F #, C, F
Ua Relative humidity %RH #, P
Rc Rain accumulation mm, in #, M, I
Rd Rain duration s #, S
Ri Rain intensity mm/h, in/h #, M, I
Rp Rain peak intensity mm/h, in/h #, M, I
Hc Hail accumulation
hits/cm
2
, hits/in
2
, hits
#, M, I, H
Hd Hail duration s #, S
Hi Hail intensity
hits/cm
2
h, hits/in
2
h, hits/
h
#, M, I, H
Hp Hail peak intensity
hits/cm
2
h, hits/in
2
h, hits/
h
#, M, I, H
Th Heating temperature °C, °F #, C, F
Vh Heating voltage V
#, N, V, W, F
2
2. For heating # = heating option is not available (has not been ordered). N = heating option is available
but have been disabled by user or the heating temperature is over the high control limit. V = heating is
on at 50% duty cycle and the heating temperature is between the high and middle control limits. W =
heating is on at 100% duty cycle and the heating temperature is between the low and middle control
limits. F = heating is on at 50% duty cycle and the heating temperature is below the low control limit.
Vs Supply voltage V V
Vr 3.5 V ref. voltage V V
Id Information field alphanumeric
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 8 5
- CHAPTER 9 5
- APPENDIX E 7
- List of Figures 9
- List of Tables 11
- GENERAL INFORMATION 13
- General Safety Considerations 14
- Trademarks 16
- License Agreement 16
- Regulatory Compliance 16
- Warranty 17
- PRODUCT OVERVIEW 19
- Heating Function 20
- WXT520 Transmitter Components 21
- 0803-028 22
- 0505-193 24
- 0804-022 24
- 0806-001 26
- 0.5 L 1 t 28
- PTU Measurement Principle 31
- Heating (Optional) 31
- 0806-010 32
- Selecting the Location 34
- 0712-009 35
- 0803-030 37
- 0803-032 39
- Grounding the WXT520 40
- Marine Grounding Jumper 41
- 0803-048 42
- Wind Direction Offset 44
- WIRING AND POWER MANAGEMENT 45
- 0805-023 46
- External Wiring 48
- Internal Wiring 49
- 0803-035 50
- Data Communication Interfaces 52
- Power Management 53
- CONNECTION OPTIONS 57
- Connection cables 58
- Service Cable Connection 60
- Connector or Screw Terminal 61
- Checking the Current 62
- Communication Settings (aXU) 62
- Changing the Communication 65
- Settings (aXU) 65
- GETTING THE DATA MESSAGES 67
- General Commands 68
- Reset (aXZ) 68
- Precipitation Counter Reset 69
- Measurement Reset (aXZM) 71
- ASCII Protocol 72
- Abbreviations and Units 72
- Device Address (?) 73
- Wind Data Message (aR1) 74
- Pressure, Temperature and 75
- Humidity Data Message (aR2) 75
- Supervisor Data Message (aR5) 77
- Combined Data Message (aR) 78
- Composite Data Message Query 78
- Polling with CRC 79
- SDI-12 Protocol 82
- Address Query Command (?) 83
- Change Address Command (aAb) 84
- CRC (aMC) 87
- CRC (aCC) 88
- Send Data Command (aD) 89
- Examples of aM, aC and aD 90
- Commands 90
- Continuous Measurement (aR) 92
- NMEA 0183 V3.0 Protocol 95
- MWV Wind Speed and Direction 96
- XDR Transducer Measurement 98
- TXT Text Transmission 106
- Automatic Mode 108
- Automatic Composite Data 108
- Message (aR0) 108
- SENSOR AND DATA MESSAGE 109
- SETTINGS 109
- Setting Fields 111
- Changing the Settings (aWU) 113
- Checking the Settings (aTU) 115
- Changing the Settings (aTU) 117
- Precipitation Sensor 119
- Checking the Settings (aRU) 119
- Changing the Settings (aRU) 123
- Supervisor Message 125
- Checking the Settings (aSU) 125
- Changing the Settings (aSU) 127
- Composite Data Message (aR0) 129
- 0R0<cr><lf> 130
- MAINTENANCE 131
- Replacing the PTU Module 132
- Vaisala Service Centers 133
- TROUBLESHOOTING 135
- Self-Diagnostics 137
- Error Messaging/Text Messages 137
- Rain and Wind Sensor Heating 139
- Operating Voltage Control 139
- Technical Support 139
- TECHNICAL SPECIFICATIONS 141
- Tab le 14 Wi nd 142
- Table 15 Relative Humidity 143
- Table 16 Precipitation 143
- Inputs and Outputs 144
- Operating Conditions 145
- Materials 146
- Options and Accessories 147
- Dimensions (mm/inch) 148
- 0805-013 149
- 0505-211 150
- Communication Protocol 152
- RS-485 Serial Interface 153
- ASCII, Polled 153
- NMEA 0183 v3.0, Query 154
- Query Commands 156
- SDI-12 PROTOCOL 159
- SDI-12 Timing 161
- CRC-16 COMPUTATION 163
- WIND MEASUREMENT AVERAGING 165
- 0505-215 166
- General Unit Settings 168
- Wind Configuration Settings 168
- PTU Configuration Settings 169
- Rain Configuration Settings 169
- Supervisor Settings 169
- *M210906EN* 171
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