Campbell CR6 Series, Operator'S Manual

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Section 7. Installation
201
Multi-statement declarations can be located as follows:
•
Prior to BeginProg ,
• After EndSequence or an infinite Scan() / NextScan and before
EndProg or SlowSequence
•
Immediately following SlowSequence. SlowSequence code starts
executing after any declaration sequence. Only declaration sequences can
occur after EndSequence and before SlowSequence or EndProg .
7.6.3.11.1 Declaring Data Tables
Data are stored in tables as directed by the CRBasic program. A data table is
created by a series of CRBasic instructions entered after variable declarations but
before the BeginProg instruction. These instructions include:
DataTable()
'Output Trigger Condition(s)
'Output Processing Instructions
EndTable
A data table is essentially a file that resides in CR6 memory. The file is written to
each time data are directed to that file. The trigger that initiates data storage is
tripped either by the CR6 clock, or by an event, such as a high temperature. The
maximum number of data tables is 253, but the maximum can vary with other
programming considerations. If your need for data tables approaches the
maximum, only testing will define your limit. Data tables may store individual
measurements, individual calculated values, or summary data such as averages,
maxima, or minima to data tables.
Each data table is associated with overhead information that becomes part of the
ASCII file header (first few lines of the file) when data are downloaded to a PC.
Overhead information includes the following:
• Table format
•
Datalogger type and operating system version
• Name of the CRBasic program running in the datalogger
• Name of the data table (limited to 20 characters)
•
Alphanumeric field names to attach at the head of data columns
This information is referred to as "table definitions."