FIFO DAT

Summary

The FIFO DAT maintains a user-set maximum number of rows in a table. You add rows using the echo Command. When its capacity is reached, the first row is removed. After the maximum number of rows is reached, the oldest row is discarded when a new row is added.

Rows can be added to the FIFO DAT by using the echo Command, the table Command or the tabinsert Command. Text can also be echoed directly to a FIFO DAT like this:

echo somedata >> fifo1

Parameters

Script DAT /script - The Script DAT will execute once for each row added to the FIFO DAT.

Execute From /executeloc - Determines the location the script is run from.

• Current Node /current - The script is executed from the current node location (for example, where 'cc' points to).
• Script DAT /script - The script is executed from the location of the DAT specified in the Script DAT parameter.
• Specified Component /comp - The script is executed from the component specified in the Component parameter below.

From Component /component - The component whose state change will trigger the DAT to execute its script when Execute is set to On Panel Change. This component is also the path that the script will be executed from if the Execute From parameter is set to Specified Component .

Clamp Output /clamp - The DAT is limited to 100 messages by default but with Clamp Output, this can be set to anything including unlimited.

Maximum Lines /maxlines - Limits the number of messages, older messages are removed from the list first.

Clear Output /clear - Deletes all lines except the heading. To clear with a script command, here is an example: opparm -c /fifo1 clear