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Execution order of mdlOutputs and mdlUpdate

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Martin
Martin 2015-7-10
Hi,
I have a Simulink model with two types of blocks, A and B. A does some pre- and postcalculation in each simulation step (there is only one block of type A in the model), while the main computation is done by blocks of type B. It is important that mdlOutputs of all blocks of type B is executed between the pre- and the postcalculation in block A. So far, I solved it by setting the option SS_OPTION_PLACE_ASAP for block A, doing the precalculation in A::mdlOutputs, and the postcalculation in A::mdlUpdate. This works if all blocks have the same sample time. For example, if the sample time is 0.1 and I have two blocks of type B (namely B1 and B2), I get the following execution order:
t = 0.0
A::mdlOutputs (precalculation)
B1::mdlOutputs
B2::mdlOutputs
A::mdlUpdate (postcalculation)
t = 0.1
A::mdlOutputs (precalculation)
B1::mdlOutputs
B2::mdlOutputs
A::mdlUpdate (postcalculation)
t = 0.2
A::mdlOutputs (precalculation)
B1::mdlOutputs
B2::mdlOutputs
A::mdlUpdate (postcalculation)
However, if I change the sample time of block B2 to 0.2, it doesn't work any longer:
t = 0.0
A::mdlOutputs (precalculation)
B1::mdlOutputs
A::mdlUpdate (postcalculation)
B2::mdlOutputs // after postcalculation -> wrong
t = 0.1
A::mdlOutputs (precalculation)
B1::mdlOutputs
A::mdlUpdate (postcalculation)
t = 0.2
A::mdlOutputs (precalculation)
B1::mdlOutputs
A::mdlUpdate (postcalculation)
B2::mdlOutputs // after postcalculation -> wrong
Is there a way to get B2::mdlOutputs called between the calls of A::mdlOutputs and A::mdlUpdate?
Many thanks in advance, Martin

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