Hcs12e128

beginner2011

Member
Join Date
Mar 2011
Location
Glasgow
Posts
1
Hi

I was wondering if anyone would be able to help me with a problem i have.

I have designed a window cleaning gondola control program which controls the vertical movement of the gondola down the face of the building. The general description of this program allows the gondola to be lowered at 2 different speeds. On approaching the ground, a 'ground proximity' detector will alter the speed of decent and on finally reaching the ground the operation of lowering will be stopped.
If however the operator senses that the wind speed exceeds a tolerable level he or she can push a 'panic' button and the gondola will be automatically lowered to the ground at 'creep' speed.

Ive specified the operation of the program using a ladder diagram (attached).
I would like to add an additional feature to the system that will toggle an LED every 0.5sec to show it is operational.

Could anyone tell me how I would add this to my ladder diagram.


Thanks.
 
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