GE 90-30/20/Micro Manual De Usuario

 

This section explains how to use on-delay and stopwatch-type timers, up counters, and down
counters.  The data associated with these functions is retentive through power cycles.

ONDTR

Retentive On-Delay Timer

4-11

TMR

Simple On-Delay Timer

4-14

OFDT

Off-Delay Timer

4-17

UPCTR

Up Counter

4-20

DNCTR

Down Counter

4-22

Each timer or counter uses three words (registers) of %R memory to store the following
information:

current value (CV)

word 1

preset value (PV)

word 2

control word

word 3

When you enter a timer or counter, you must enter a beginning address for these three words
(registers) directly below the graphic representing the function.  For example:

            

(enable)  *|ONDTR|*(Q)

                       

             

  

      

   

                     

here.

- 

ONDTR

 -

Do not use consecutive registers for the 3 word timer/counter blocks. Logicmaster
does not check or warn you if register blocks overlap. Timers and counters will
not work if you place the current value of a block on top of the preset for the
previous block.