Section 11. Programming Resource Library
115
11.4.1.2.1
Start Measurement Command (aMv!)
Qualifier
v
is a variable between 1 and 9. If supported by the sensor
manufacturer, v requests variant data. Variants may include:
•
alternate units (e.g. °C or °F)
•
additional values (e.g., level and temperature)
•
diagnostic of the sensor’s internal battery
Example:
Command:
5M!
Response: 500410 (atttnn, indicates address 5, data ready in 4 seconds, will
report 10 values).
Example:
Command:
5M7!
Response: 500201 (atttnn indicates address 5, data ready in 2 seconds, will
report 1 value).
v
= 7 instructs the sensor to return the voltage of its internal
battery.
11.4.1.2.2
Start Concurrent Measurement Command (aC!)
Concurrent measurement allows the CR200(X) to request a measurement,
continue program execution, and pick up the requested data on the next pass
through the program. The datalogger scan rate should be set such that the
resulting skew between time of measurement and time of data collection does
not compromise data integrity.
Note This command is new to Version 1.2 or higher of the SDI-12
Specification. Older sensors, older loggers, or new sensors that do not meet
v1.2 specifications will likely not support this command
11.4.1.2.3
Aborting a Measurement Command
A measurement command (
M!
or
C!
) is aborted when any other valid command
is sent to the sensor.
11.4.1.3 Send Data Commands (aDv! & aRv!)
11.4.1.3.1
Send Data Command (aDv!)
This command requests data from the sensor. It is normally issued
automatically by the datalogger after measurement commands
aMv!
or
aCv!
. In
transparent mode, the user asserts this command to obtain data. If the expected
number of data values are not returned in response to a
aD0!
command, the data
Содержание CR200
Страница 32: ...Section 2 Quickstart Tutorial 22 ...
Страница 45: ...Section 3 Overview 35 3 3 Specifications ...
Страница 46: ...Section 3 Overview 36 ...
Страница 58: ...Section 4 Sensor Support 48 ...
Страница 62: ...Section 5 Measurement and Control Peripherals 52 ...
Страница 78: ...Section 8 CR200 X Configuration 68 ...
Страница 102: ...Section 9 Programming 92 ...
Страница 138: ...Section 11 Programming Resource Library 128 ...
Страница 156: ...Section 16 Support Software 146 ...
Страница 160: ...Section 17 Care and Maintenance 150 ...
Страница 166: ...Section 18 Troubleshooting 156 18 3 3 Diagnosis and Fix Procedures 18 3 3 1 Battery Voltage Test ...
Страница 167: ...Section 18 Troubleshooting 157 18 3 3 2 Charging Circuit Test Solar Panel ...
Страница 168: ...Section 18 Troubleshooting 158 18 3 3 3 Charging Circuit Test Transformer ...
Страница 169: ...Section 18 Troubleshooting 159 18 3 3 4 Adjusting Charging Circuit Voltage ...
Страница 170: ...Section 18 Troubleshooting 160 ...
Страница 184: ...Appendix A Glossary 14 ...
Страница 190: ...Appendix B Status Table and Settings 20 ...
Страница 192: ...Appendix C Serial Port Pin Outs 22 ...
Страница 211: ......