How come I can't interrupt a function execution immediately using Ctrl+C ?

Hi,

I'm using modbus function and when I initiate a connection with a bad IP address, I get an error as expected but it takes 15 seconds each time and there is no way to interrupt it faster, not even with Ctrl+C. I dug into modbus function and found a private method simply called 'connect'. The delay is all here and there's no timeout parameter. Is there a way to change its timeout parameter so it waits 2 seconds instead or at least interrupt its execution?

Thanks.

Answer 1

[Kirthi]

Hello Alexandre,

I can answer your issue of Ctrl+C not working.

Go to Model settings => Simulation Target => Advanced parameters. Now check if the 'Break on Ctrl-C' option is enabled or not.

Break on Ctrl+C will not work if this option isn't checked.

Hope this helps !

[Alexandre]

Hi Kirthi,

This option is checked and I use it all the time. It just seems that the function that is executing is so deep in Matlab environment that I can't interrupt it. Modbus function tries to establish connection during 20 seconds and there is nothing I can do about it which is unusual.

Parameters 'Timeout' and 'NumRetries' have not effect.These commands both takes 20 seconds before showing the expected connection error.

modbusObj = modbus('tcpip', '10.1.1.2', 502);

modbusObj = modbus('tcpip', '10.1.1.2', 502,'Timeout',1,'NumRetries',1);

Several open source master Modbus testers (such as QModMaster) tells in about a second if you can't connect to a Modbus slave. How come MATLAB takes 20 seconds and there is nothing I can do about it?

Thank you.

[Kirthi]

Hi Alexandre,

I understand your concern but there is no way you can change the time delay in execution of "modbus" function. However, we might consider resolving this in our future releases.

Thank you.