Campbell MetSENS Series, Product Manual

Page: 16 / 39

The ModbusClient() instruction has the following syntax:
ModbusClient (Result, ComPort, Baud, Addr, Function, Variable, Start, Length,
Tries, TimeOut, [ModbusOption])
The
Addr
parameter must match the sensor Modbus address. To collect all of the values, the
Start
parameter needs to be 1 and the
Length
parameter needs to correspond with the
register count (see Modbus measurements [p. 15]). ModbusOption is an optional parameter
described in the CRBasic Editor Help.
6.2.2 SDI-12 programming
The SDI12Recorder() instruction is used to measure a MetSENS-series configured for SDI-12
measurements. The
SDI12Recorder()
instruction sends a request to the sensor to make a
measurement and then retrieves the measurement from the sensor. See SDI-12 measurements
(p. 18) for more information.
For most data loggers, the SDI12Recorder() instruction has the following syntax:
SDI12Recorder (Destination, SDIPort, SDIAddress, “SDICommand”, Multiplier, Offset,
FillNAN, WaitonTimeout)
Valid values for the
SDIAddress
are 0 through 9, a through z, and A through Z; alphabetical
characters need to be enclosed in quotation marks (for example,
“A”
). Also enclose the
SDICommand in quotation marks as shown. The Destination parameter must be an array.
The required number of values in the array depends on the command; see Table 7-5 (p. 19).
FillNAN
and
WaitonTimeout
are optional parameters (refer to CRBasic Editor help for more
information).
6.2.3 RS-232 programming
The RS-232 instructions are shown in Table 6-4 (p. 14).
MetSENS-Series Compact Weather Sensors 13