Aritech FP2000, Reference Manual

Page: 149 / 209

The simplest logic statement (which is also the default statement) is:
Step m
( Input n
Step m+1 ) = Output n
Output n will be set true or false if Input n is true or false.
An example of a multiple term statement not using nesting is:
Step
1 ( Input 1
2 AND Input 2
3 OR Input 3
4 AND not Input 100
5 OR Timer 2
6 AND Marker 3
7 ) = Output 7
An example of multiple term nested expressions (Nesting = 4) is:
Step
1 ( Input 1
2 AND ( Input 2
3 OR ( Marker 100
4 AND NOT ( Timer 2
5 )
6 )
7 )
8 ) = OUTPUT 6
Using Markers
A marker is an internal memory bit that can be assigned true or false. Unlike Outputs,
markers can never be physically output from the panel. Markers are generally used to
hold intermediate values that will be reused in an expression.
Using Timers
(expression) = Timer xx yy
When expression is true then Timer xx will begin timing. The value of Timer xx is false. As
long as expression remains true, then timer xx will go true after time yy. If expression
goes false before time yy then the timer is stopped. If expression goes false after time yy
then the timer is reset to false and stopped. If expression true again the timer is restarted
and times out as long as expression remains true. The timer will restart each time
expression goes false and then true.
Special operators:
)Set-e Set on leading edge of input trigger pulse
)reset-e Reset on leading edge of input trigger pulse
)Set-s Set on state of input trigger pulse
)reset-s Reset on state of input trigger pulse
Outputs, Markers and timers can be set and reset by two independent expressions.
Set-e Sets the output or marker or starts a timer. The output will remain set even
if the expression returns to false. A timer will continue timing.
reset-e Resets the output or stops the timer.
Set-s Sets the output or marker or starts a timer. The output will remain set even
if the expression returns to false. A timer will continue timing.
reset-s Resets the output or stops the timer.
Editing
INSERT - Selecting Insert and pressing in the operator field will insert a
blank line above the current line.
DELETE - Deletes the current line.