Rice Lake iRite IDE - Manual (Page 93)

920i Programming Reference - Appendix 89
since the field names are not part of the data. Click the up arrow next to Start import at row: prompt to start
at row 2 (the real data).
5. Click Next and select the separator character you used when the file was exported (the default is
tab-delimited).
6. Click Next again, then click Finish to import the file. All of your data should now be displayed in iRev . If
you wish to downloaded the imported database to the 920i , follow the procedure described in
Section 6.3.5.
6.3.4 Clearing
The Clear All button on the top of the toolbar in the iRev Data Editor clears both the iRev screen and the entire 920i
database. You must clear an existing 920i database before downloading edited data, but this function must be
used with care to avoid losing data.
To clear a database:
1. Upload the database from the 920i (see Section 6.3.1).
2. Edit the database and fields, if necessary.
3. Use the Export function described in Section 6.3.2 to save a copy of the database.
4. Highlight all of the fields at once and copy them using either Ctrl-C or by choosing Edit-Copy from the
toolbar.
5. Click the Clear All button to clear both the 920i database and the iRev fields.
6. Upload the blank database from the 920i to ensure data integrity. The lock symbol on the iRev screen will
open, allowing a new database to be downloaded.
7. To replace the cleared database with edited data, move the cursor to the upper left-hand box and paste the
copied data back into the iRev database. (Press Ctrl-V or choose Edit-Paste from the toolbar.)
8. Click the Download button to send fresh, edited data back down to the indicator (see below).
6.3.5 Downloading
IMPORTANT: When you download data to the 920i , it does not overwrite data that is there. Downloaded data is
added to the database regardless of whether it is the same data. If you edit uploaded data in iRev and want to
replace the indicator database, you must first Clear All, upload the cleared (blank) database, and then download
the edited data. (See Section 6.3.4 above.)
1. Create or edit the data in the rows and columns you want entered in the database.
2. With the indicator connected, click the Download button at the top on the toolbar.
3. A status box shows the download progress ( Downloading Row [number] of [total rows] ). When complete, a
Download completed successfully message is shown. The database is now stored in the 920i .
6.4 Fieldbus User Program Interface
The fieldbus data APIs (see “Fieldbus Data” on page 63), two type definitions (BusImage, BusImageReal), and
the EventPort function are used to manage fieldbus data.
The function of BusCommandHandler is similar to other user-written event handlers. When present and enabled
with the EnableHandler(BusCommandHandler) call, the BusCommandHandler is activated every time a message
is received on a fieldbus. Keeping the BusCommandHandler execution short is important in order to not miss
data transfers on the fieldbus.
The normal operation of BusCommandHandler is expected to include the following system calls in the following
order:
• EventPort
• GetImage, or GetImageReal
• SetImage, or SetImageReal
with intervening code to perform the required user functions. The SetImage or SetImageReal call should be as
close to the end of the BusCommandHandler as possible.
The BusImage type is the data type passed in GetImage and SetImage (or, for real data, GetImageReal and
SetImageReal).