Hi Guys,
I'm a beginner in the PID World, so right now I'm trying to program one controller to do the following:
I have a Burst Machine to test pipe samples -big sizes, over 12" - 36" Outer Diameter by 40"long-.
So the test logic is as follow:
I need to reach a specific pressure (psi) in specific time (65 sec) ASTM Standard Test, the pressure rate depends on the thickness wall of each sample, but the time to reach the pressure keeps the same, no matter of the size. That means I need more or less flow-rate -depends on the sample I'll be testing-.
So I have a centrifugal pump to fill the pipe sample, when its filled ,I switch to a pressure pump, where the PID comes into play, it needs to sense the current pressure inside the sample -tru a Pressure Transducer-, send the signal tru the PLC "makes the magic" and adjust to frequency of the pressure pump VDF needed to achive the pressure set point in to the specified test time....
I'm stuck in how to setup it, due the finite time -65 sec-, how I need to tune that PID...
Hope you guys can help me out!
Best Regards
Ulloap
I'm a beginner in the PID World, so right now I'm trying to program one controller to do the following:
I have a Burst Machine to test pipe samples -big sizes, over 12" - 36" Outer Diameter by 40"long-.
So the test logic is as follow:
I need to reach a specific pressure (psi) in specific time (65 sec) ASTM Standard Test, the pressure rate depends on the thickness wall of each sample, but the time to reach the pressure keeps the same, no matter of the size. That means I need more or less flow-rate -depends on the sample I'll be testing-.
So I have a centrifugal pump to fill the pipe sample, when its filled ,I switch to a pressure pump, where the PID comes into play, it needs to sense the current pressure inside the sample -tru a Pressure Transducer-, send the signal tru the PLC "makes the magic" and adjust to frequency of the pressure pump VDF needed to achive the pressure set point in to the specified test time....
I'm stuck in how to setup it, due the finite time -65 sec-, how I need to tune that PID...
Hope you guys can help me out!
Best Regards
Ulloap