Campbell CR800 Especificaciones Pagina 273
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Section 12. Serial Input and Output Functions
12-3
ModBusMaster (ResultCode, ComPort, BaudRate, ModBusAddr, Function,
Variable, Start, Length, Tries, TimeOut)
The ModBusMaster instruction sets up a datalogger as a ModBus master
device to send or retrieve data to/from a ModBus slave.
Syntax
ModBusMaster ( ResultCode, ComPort, BaudRate, ModBusAddr, Function,
Variable, Start, Length, Tries, TimeOut )
Remarks
The datalogger supports ModBus functions 01-05, 15, and 16 (see Function
parameter below). The ModBusMaster instruction can be placed outside of the
main program (defined by BeginProg/EndProg).
See the CRBasic Editor help for parameter details.
ModBusSlave (ComPort, BaudRate, ModBusAddr, DataVariable,
BooleanVariable)
The ModBusSlave instruction sets up a datalogger as a ModBus slave device.
Syntax
ModBusSlave ( ComPort, BaudRate, ModBusAddr, DataVariable,
BooleanVariable)
Remarks
This instruction sets up a ModBus slave device to respond to the data request
of a ModBus master. Supported ModBus functions are 01, 02, 03, 04, 05, 15,
and 16. See the CRBasic Editor help for parameter details.
Notes:
The datalogger communicates in RTU mode (not ASCII mode) to other
ModBus devices. The communications port, baud rate, data bits, stop bits, and
parity are set in the ModBus driver for PC-based software or on the PLC.
The datalogger usually goes into sleep mode after 40 seconds of inactivity on
the communications port. After going to sleep with some interface methods it
sometimes takes a packet of incoming data to wake it up and then a retry
packet to get the message through. For example, the first byte of the packet is
spent waking up the SC32A/B or SC929, so a packet retry within 40 seconds is
required to get a complete ModBus packet into the datalogger for processing.
If packets continue arriving before the 40 second timeout, the datalogger
should respond very quickly to the new packets. If necessary, you can tie pin 3
of the datalogger's CS I/O port to 5V to keep the datalogger awake. The
drawback to this approach is that the average current draw will be higher than
if the datalogger is allowed to go into its low power sleep mode between
infrequent ModBus queries.
Some ModBus devices (e.g., some RTUs made by Bailey Controls that use less
common CPUs) require reverse word order (MSW/LSW) in the floating point
format. The datalogger currently does not support this less common word
order. (There are experimental versions of some datalogger operating systems
- CR800/CR850 Measurement 1
- Warranty and Assistance 2
- Appendix 7
- Figures 7
- OV1.1.8 Digital I/O (C1-4) 11
- OV1.1.9 Pulse Inputs (P1-2) 12
- OV1.1.10 Program Status 12
- OV1.2.1 CS I/O 12
- OV1.2.2 Computer RS-232 13
- OV2.1 Memory 14
- OV2.2 Programming 14
- OV2.3.1 Pipeline Mode 15
- OV2.3.2 Sequential Mode 15
- OV2.3.3 Slow Sequence Scans 16
- OV2.3.4 Task Priority 16
- OV2.4 Data Tables 17
- OV2.5 PakBus 17
- OV3. Device Configurator 18
- OV3.1 Main DevConfig Screen 19
- OV3.2 Deployment Tab 20
- OV3.2.2 Ports Settings 21
- OV3.2.3 Advanced 23
- OV3.3 Logger Control Tab 24
- OV3.5 Settings Editor Tab 26
- OV3.6 Terminal Tab 27
- OV4. Quick Start Tutorial 28
- OV4.4 PC200W Software 30
- OV4.4.4 Send the Program 35
- OV4.4.5 Monitor Data Tables 35
- OV4.4.6 Collect Data 36
- OV4.4.7 View Data 37
- OV5. Keyboard Display 39
- CR1000KD or CR850 Display 40
- OV5.1 Data Display 41
- CR800 and CR850 Overview 42
- 1.2 Power Requirements 53
- 12V ALKALINE BATTERY PACK 55
- 1.4 Solar Panels 58
- 1.7 CR800 Grounding 59
- 1.10 Maintenance 63
- 1.10.1 Desiccant 64
- 2.1 Data Storage in CR800 69
- 2.2 Internal Data Format 69
- 2.3 Data Collection 70
- 2.4 Data Format on Computer 70
- 3.1.1 Voltage Range 75
- 3.1.4 SettlingTime 77
- Measurements 78
- 3.3 Signal Settling Time 80
- Settling Time 82
- 3.4.1 Error Analysis 83
- Time Minutes 85
- Measured - Actual degrees C 85
- Thermocouple Limits of Error 86
- ± 0.5% Not Estab 86
- Noise on Voltage Measurement 88
- Error Summary 89
- can be minimized by making 90
- CR800 Junction Box 91
- 3.8 Self Calibration 95
- °C) the 96
- °C out into a 96
- Programming 97
- 4.2 Programming Sequence 98
- 4.3 Example Program 100
- CallTable Temp 102
- 4.4 Variable Data Types 103
- 4.5 Numerical Entries 105
- 4.6.1 What is True? 106
- 4.6.2 Expression Evaluation 106
- 4.7 Flags 107
- 4.8 Parameter Types 107
- AngleDegrees 111
- AS type 112
- PipelineMode 114
- SequentialMode 115
- Station Name 115
- Sub, Exit Sub, End Sub 116
- 6.1 Data Table Declaration 119
- 6.2 Trigger Modifiers 120
- OpenInterval 121
- FillStop 123
- DSP4 (FlagVar, Rate) 126
- BufferControl 127
- Remarks 128
- StatusCommand 129
- Highlimit, MinAmp, Form) 144
- Measured raw data: 150
- Calculations: 150
- ΘΘ ΘuNUSsNS 152
- ()(( /)) ( /) 153
- ΘuUS US=− =−21 811 153
- This is a blank page 154
- 7.8 Specific Sensors 156
- 7.9 Peripheral Devices 156
- 7.1 Voltage Measurements 157
- Integ, Mult, Offset) 158
- 7.4 Full Bridges 162
- 7.5 Excitation 164
- 7.6 Self Measurements 165
- Calibrate (Dest, AllRanges) 166
- 7.7 Digital I/O 169
- Timeout, Mult, Offset) 170
- ± 10 mV) and resolution (1.2 171
- Silicon diodes 171
- PortsConfig (Mask, Function) 172
- PortGet (Dest, Port) 172
- PortSet (Port, State) 173
- Constant 174
- ReadIO (Dest, Mask) 176
- Offset) 176
- WriteIO (Mask, Source) 177
- SlowAntenna 179
- Variable 180
- SettlingTime 181
- SDMAddress 184
- TimeQuanta t 185
- SDMSpeed (BitPeriod) 199
- SDMTrigger 199
- SDMX50 (SDMAddress, Channel) 200
- Mult, Offset) 201
- Instructions 203
- ACOS (Source) 204
- ASIN (Source) 206
- ATN (Source) 206
- AvgSpa (Dest, Swath, Source) 208
- Cos (Source) 209
- CosH (Source) 210
- FirstSetStart) 210
- DewPoint (Dest, Temp, RH) 211
- Exp (Numeric Expression) 213
- Frac (Source) 215
- Int, Fix 218
- Ln (Source) 219
- Log (Source) 219
- LOG10 (number) 219
- MaxSpa (Dest, Swath, Source) 220
- MinSpa (Dest, Swath, Source) 220
- Randomize (Number) 227
- RealTime 227
- RectPolar (Dest, Source) 228
- RMSSpa (Dest, Swath, Source) 229
- RND (Source) 229
- SatVP (Dest, Temp) 230
- Sgn (Number) 233
- Sin (Angle) 233
- SinH (Expression) 234
- Sqr (Number) 234
- Tan (Source) 235
- TANH (Source) 236
- Derived Math Functions 239
- Section 9. Program Control 241
- CallTable 242
- Data … Read … Restore 243
- ClockSet (Source) 244
- Delay (Option, Delay, Units) 244
- Do … Loop 245
- FileManage 246
- FileMark (TableName) 247
- For ... Next 247
- RunProgram 251
- ResetTable 252
- Scan … NextScan 252
- SelectCase … EndSelect 253
- Slow Sequence 257
- Timer (TimNo, Units, TimOpt) 259
- WaitDigTrig (Port, Edge) 260
- While…Wend 261
- DisplayMenu/EndMenu 264
- 11.1.1 Constant Strings 267
- 11.1.2 Add Strings 267
- Processing Instructions 268
- LowerCase (SourceString) 269
- StrComp (String1, String2) 270
- UpperCase (SourceString) 270
- Functions 271
- DialVoice (DialString) 272
- BooleanVariable) 273
- SerialClose (ComPort) 274
- SerialFlush (ComPort) 275
- ClockReport 280
- PakBusClock (PakBusAddr) 280
- Routes (Dest) 280
- GetSwath) 281
- TimeOut, Settings) 282
- TimeUntilTransmit 283
- 14.2.2 PakBus Address Setup 291
- 14.2.4 Router Setup 293
- 14.2.5.2 Baud Rates 294
- 14.3 PakBus Concepts 295
- 14.3.2 PakBus Devices 296
- 14.3.3 Neighbor Discovery 296
- 14.3.4 Neighbor Removal 297
- 14.3.6 Routers 298
- 14.3.8 Leaf-Nodes 302
- ComPort_2 303
- PakBusPort 303
- 14.4 Settings Editors 304
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