Low Cutoff; Set Cndtionl; Timeout - Omega RD8800 User Manual

Chapter 5 Programming

5.6.5.19 Low cutoff

This function allows the user to program a Low flow cutoff. If Totalization is not wanted below a
predetermined flowrate, the Low cutoff can be set at that rate and Totalization will be shut off if the point
level falls below the preset value.
To set the Low cutoff:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Low cutoff and press the
ENTER button. You will be prompted with "cut XXX.XX ". Use the numeric keypad to enter the desired
Low cutoff value and press the ENTER button to return to the Point Setup menu.

5.6.5.20 Set cndtionl

The Set conditional option allows the user to program a set of conditions for a point. Up to 40 operators
can be programmed in any one conditional statement. The available conditional operators are:
P1 to PF are used to represent Points (Must be pre programmed)
K1 to KF are used to represent Constants (Must be pre programmed)
) RIGHT Parenthesis
| OR
& AND
< Less than
> Greater than
= Equal to
!= Not equal to
<= Less than or equal to
>= Greater than or equal to
! NOT
( LEFT Parenthesis
To Set a conditional statement:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Set condtionl and press the
ENTER button. Use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to scroll through the conditional operators until you
reach the desired operator. Then use the RIGHT ( ) button to move the cursor to the next position.
Continue using the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to select the operators and the LEFT ( ) or RIGHT ( )
button to move the cursor until the conditional statement is complete. Forty (40) positions are available for
conditional operators, and the display will scroll to the left or right to allow entry. When the desired
conditional statement is displayed, press the ENTER button to return to the Point Setup menu. The
conditional statement is evaluated from left to right. Use parenthesis to change the order of evaluation.
The result of any conditional statement evaluation is either TRUE or FALSE.

5.6.5.21 Timeout

The Timeout option sets a maximum time period between signal updates from the external source before
flagging the point as invalid. The point is flagged invalid if no update is received within the specified timeout
period. If the Timeout value is set to 0, the Timeout option is disabled.
To set a Timeout value:
From the Point Setup menu use the UP (↑ ↑ ↑ ↑ ↑ ) or DOWN (↓ ↓ ↓ ↓ ↓ ) button to highlight Timeout and press the
ENTER button. You will be prompted with "seconds
desired Timeout value (up to 3600 seconds, 1 hour) and press the ENTER button to return to the Point
Setup menu.
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XXXX ". Use the numeric keypad to enter the
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