question

Aries Vash avatar image
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Aries Vash asked Carter Walch commented

Photo-Eye Condition on Block

Hi, I would like to ask for some help regarding the condition to write for the photo-eye.

What I would like to do is to block the item and stop the motor if the current quantity in the queue reaches 3 boxes.

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Photo-eye testing.fsm

FlexSim 19.2.4
photo eyeconveyor motoronblock
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photo-eye-testing.fsm (42.3 KiB)
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Carter Walch avatar image
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Carter Walch answered Carter Walch commented

Hi @Aries Vash ,

You just need to change your condition so it's checking if the Queue content is equal to 3. A condition must return true or false. This stops the motor of the conveyor when Queue content is 3 and then it continues after items are processed1691071976256.png

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Aries Vash avatar image Aries Vash commented ·
wow thanks, really got confused there I've tried content(Model.find("Queue1")) = 3 and I get error, never thought that it should be ==, may i have a question whats the difference between = & == ?
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Carter Walch avatar image Carter Walch Aries Vash commented ·
No worries. Single equal sign (=) is used for assigning values to a variable. Double equal sign (==) is used whenever we are testing a condition, we must use == because it returns a true or false
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