Cannot delete PID block

I have some PID blocks created in R2016B, I have converted the model to R2019B. The Model runs fine but I cannot delete some PID blocks. I get a message about error trying to execute the 'DeleteFcn' and specific reference to Callback string is 'pid pack.PID Config.closeTuner(gcbh)'

These were PID blocks which I had modified (which I think means I had to unlink them or something but I cannot recall). Even if I delete all the content inside the subsystem I still cannot delete it.

I verified I still do indeed have an active license for Simulink Control Design.

Answer 1

[Monika Jaskolka]

It looks like the DeleteFcn in 2016 was pidpack.PIDConfig.closeTuner(gcbh) while in 2019 it is pidpack.PIDConfig.utilcloseTuner(gcbh). Try this:

1. Click on the PID block
2. Go to the Command Window and enter the following:

set_param(gcbh, 'DeleteFcn', 'pidpack.PIDConfig.utilcloseTuner(gcbh)')

3. Try to delete the block

If this still doesn't work, I would try just deleting the callback altogether:

set_param(gcbh, 'DeleteFcn', '')

[mariko shirazi]

Thank you Monika! Do you know if this will affect my entire Simulink operation, meaning every time I try to delete a PID block it will use the new command, or will it just affect ability to delete that particular block I selected? I actually hope the latter as I am in the middle of big project and bit scared of upsetting the apple cart...

[Monika Jaskolka]

The steps described only impact the PID block that you have selected (see the gcbh command). You can of course use a loop to adjust all PID blocks in your model, if you wish:

pid_blks = find_system(gcs, 'MaskType', 'PID 1dof');
for i = 1:numel(pid_blks)
    set_param(pid_blks{i}, 'DeleteFcn', 'pidpack.PIDConfig.utilcloseTuner(gcbh)');
end

I am curious how this issue arose in the first place. When I open a 2016b model, containing PID blocks, in 2019b, the DeleteFcn is updated automatically.

[mariko shirazi]

Thank you for pointing this out, I was working off a version of Matlab which I had opened through another program, Opal-RT RT-Lab. I tried opening Matlab R2019b directly and then opening the model, indeed I was able to delete the PID blocks. Curiously, I did get a bunch of Warning messages when I closed the model however, all like the one below. I really appreciate your help. I'll have to figure out what happens when RT-Lab opens Matlab. At the very least, I just have to open the model directly in Matlab first, delete what I want to and THEN open from RT-Lab. Thank you much,

Warning: Error evaluating 'ModelCloseFcn' callback of

SubSystem block (mask)

'uGrid_1Dsl_1INV/SM_Master/SM_Inv_Load_and_IO/Inv as LN

Voltage Source - Set InvVsrc=1 in init

file/DCX1_Controller/Modified Discrete PID Mari

05-SEP-2020'.

Callback string is 'pidpack.PIDConfig.closeTuner(gcbh)'

[mariko shirazi]

For completeness, I should have mentioned that in addition to the string of warnings related to the 'ModelCloseFcn' callback, I got warnings also for use of the 'DeleteFcn' callback. But at least it let me actually delete the blocks, and I'm thinking I can just ignore those warnings.

[mariko shirazi]

Sorry only reason for delay in acceptance is that I didn't know I had to vote and accept...

Thank you for your help!!