GE 90-30/20/Micro manual Do DWL REL

4

Example:

In the following example, a delay timer (with address) TMRID is used to control the length of time that coil DWELL is on. When the normally open (momentary) contact DO_DWL is on, coil DWELL is energized. The contact of coil DWELL keeps coil DWELL energized (when contact DO_DWL is released), and also starts the timer TMRID. When TMRID reaches its preset value of one-half second, coil REL energizes, interrupting the latched-on condition of coil DWELL. The contact DWELL interrupts power flow to TMRID, resetting its current value and de-energizing coil REL. The circuit is then ready for another momentary activation of contact DO_DWL.

DO_DWL REL DWELL

—— ——+——/—————————————————————————————————————————————————————————————( )—

DWELL

—— ——+

		_____
DWELL			REL
—— ———		TMR ———————————————————————————————————————————————————————————( )—
		0.1s
CONST —PV
+00005	_____
		TRMID

4-16 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K