Sajid,
Convergence errors occur if TRNSYS can't determine a solution
at a given time step. Non-convergence is a warning (not an error)
but if enough time steps don't converge then an error is issued.
While it is possible just to loosen the tolerances or increase the
number of allowable warnings, it is far preferable to track down
the cause of the non convergence and solve it. Usually the problem
is that the time step is too big and/or that there is not enough
thermal capacitance in the system.
The TOLERANCES and LIMITS are both set in the control cards (where you set the simulation start times, stop time, and time step.) In Trnsys17 they are on the main tab. In Trnsys18 they are on the "advanced" tab.
kind regards,
David
Dear Trnsys users,
I am facing following two errors.
Error 1. Trnsys Message 203: A convergence problem was encountered. Modification of the TOLERANCE control card may cure the problem.To tackle this error i reduced time step but then simulation studio take almost half an hour to perform one simulation. What else i can try to fix this error?
Error 2. Trnsys Message 450:My question is, how i can increase the number of these warning at my computer. Message says use LIMITS command. But i am unable to understand that how and where i have to use this command. Please shed some light on this as well.
Thank you.
Best Regards,SajidThe University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com