Particle emission play and stop

How do you use the particlesystem Emission Module.
I don’t seam to be able to play and stop the particle animation.
I’m trying to make a system where while the object is turned it will emit particels and then stop when turned back. (this means i CANNOT just disable the particle system)

TL:DR.
How you make particles turn on and off without disableing the object?

Thanks in advance and sorry for the bad english.

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On the particle system, the “Emission” checkbox can be animated. Turning off the particle system will disable all existing particles, which I suspect you don’t want. If you turn off the Emission instead, any existing particles will stay, but it will stop emitting new ones.

If that’s what you’re trying to do, you may be having some problems with the script that’s toggling the emission off/on.