4 camera files, 3 programming, 1 the cardout() instruction – Campbell Scientific NL115 Ethernet Interface and CompactFlash Module User Manual

Page 26: Cardout(stopring, size), 2 program examples, 1 ring mode, Camera files, Programming, The cardout() instruction, Program examples

NL115 Ethernet and CompactFlash

Module

7.2.4 Camera Files

JPEG images taken by a CC640 digital camera (retired) connected to the

datalogger can be stored to the CF card rather than CPU memory. This is done

by configuring the PakBus setting

Files Manager for the datalogger. This can

be done using Device Configuration Utility or PakBus Graph.

7.3 Programming

7.3.1 The CardOut() Instruction

The

CardOut() instruction is used to send data to a CF card. CardOut() must

be entered within each

DataTable() declaration that is to store data to the CF

card. Data is stored to the card when a call is made to the data table.

CardOut(StopRing, Size)

Parameter

Data Type

Enter

StopRing

Constant

A code to specify if the Data Table on the CF card is fill-and-stop or ring (newest data

overwrites oldest).

Value Result

Ring

Fill and stop

Size

Constant

The size to make the data table. The number of data sets (records) for which to allocate

memory in the CF card. Each time a variable or interval trigger occurs, a line (or row) of

data is output with the number of values determined by the output instructions within the

table. This data is called a record.

Note

Enter –1000 and the size of the table on the card will match the size of the

internal table on the datalogger. Enter any other negative number and all

remaining memory (after creating any fixed-size data tables) will be allocated to

the table or partitioned among all tables with a negative value for size. The

partitioning algorithm attempts to have the tables full at the same time.

7.3.2 Program Examples

7.3.2.1 Ring Mode

The following program outputs the maximum and minimum of the panel

temperature to the card once a second. The first parameter of the

CardOut()

instruction is 0, which sets the table on the card to ring mode. The second

parameter is negative, so all available memory on the card will be allocated to

the data table. Once all available memory is used, new data will begin

overwriting the oldest.