Nematron Pointe Controller - Manual (Page 347)

Pointe Controller User Guide Appendix C: Ladder Diagram Block Reference
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Param Name Config Var Type Description
CLK Clock req %IX
%MX
%QX
T_DONE
The input value.
Q Output req %IX
%MX
%QX
The output value that is triggered
when the input value transitions
from 1 to 0.
C.1.12 Rising Edge Detector (R_TRIG)
When used in a Ladder Diagram, the R_TRIG block waits for an input bit to
change from 0 to 1 and triggers an output bit when it does.
Select the tool (from the Relays and Coils toolbar) and click on a ladder rung
to insert the following block:
Once the block is inserted, you can double-click on it to configure it.
Functional Description
This block always passes the Enable input state (EN) through to the Enable Out
output state (ENO) without change; when EN becomes on, ENO is turned on, and
when EN becomes off, ENO is turned off.
When EN becomes on, the block function is executed: the Clock input (CLK) is
monitored for a transition from 0 to 1. When a transition is detected, the Output
(Q) is triggered; i.e., Q is set to 1 for a single execution of the block, after which it
is immediately reset to 0.
The block function is executed every time the ladder is scanned , so long as EN
remains on. However, Q is triggered only when a transition in CLK is detected.
After Q has been triggered, CLK must be reset to 0 and transition again to 1
before Q can be triggered again.