Dear Farah, When you feed an negative value into an integrator, it integrates the negative value accordingly. I have created and attached a simple project that demonstrates this. The integrated value should decrease when you feed the negative value assuming you are using Type24 for your integration. If you're using Type55, you will probably have to alter the parameters accordingly to make sure it is doing what you intend. I am not quite sure why it doesn't integrate anymore in your case. If you send me your project, I might be able to find some time tomorrow to take a look. Best regards, Matt Duffy ----- Original Message ----- From: "Farah Gammoh" <fgammoh@stud.fh-offenburg.de> Sent: Wed, September 23, 2009 7:09 Subject:[TRNSYS-users] Integrator negative vlaue Hello, What happens when you feed in a negative value into an integrator? I would like to subtract something rather than add, but an itegrator doesnt seem to do that. Once i feed in a negative value, It doesnt integrate anymore, the value remains the same. Or if that doesnt work, I would like to reset the itegrator under certain conditions. Meaning, when the integrator recieves a value of 0, it is reset to zero too. I tried doing that by subtracting the value of the integrator from itself, but as mentioned above, it doesnt seem to work. Thanks, Farah _______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users ----- End of original message -----
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