How can I make the Ignition Maker Edition adapt to the speed of data transfer between Kepware and the software (matlab) , so that the data is not lost and is displayed correctly in the Ignition Maker Edition curve?

[Transistor]

@Mohammed_Abbas

have been sending data between the software (running with a 1ms sample period)

Ignition's primary use is for SCADA systems generally using OPC communications (such as Kepware's OPC servers). Typical scan rates would be 100 ms for a reasonably snappy HMI interface, to as slow as is adequate for data logging. 1 ms scan time seems unrealistic. You will push requests into the queue and it will handle them as best it can. It sounds like you are trying to use it as a (medium-)high-speed data aquisition system instead.

You might find this post helpful.

Scanclass max speed

It depends on load. Look at the actual statistics for the specific device, particularly the average response time. That’s the round trip request from Ignition/response from PLC. Then look at the load factor. Anything close to or above 100% means there’s not enough bandwidth (somewhere, usually the PLC) to satisfy all of the subscriptions at the requested pace (scan classes), slowing everything down. The more tags monitored, the slower it all gets. You can use the system.opc.* functions to…