So, I'm being asked to tune in the spare drive in a PI loop for a pumping system. The system has a pump, 6" main line being fed from a cistern (the pump sits at the bottom level of the cistern), and uses a 4-20mA pressure transducer as feedback and an Altivar 21 drive as the controller.
The minimum pressure for the system is 17 psi according to the operator.
I have not actually tuned in a system like this before, and am just doing a bit of home work to spot any potential "gotcha's".
Only one drive will run at a time, and I'm planning to match parameters as a starting point with the working drive. The reason I'm asking is that recently there was a massive pressure drop when a fire hydrant was opened, and I wouldn't mind increasing the response time of the system to prevent this, and I'm wondering if decreasing the integral coefficient wouldn't accomplish this goal.
Are there any "gotchas" that this brings to mind or anyone or any specific info that I can give here to better define the problem?
I'm a bit new to this particular situation, and am just doing my homework before I blindly jump in.
The minimum pressure for the system is 17 psi according to the operator.
I have not actually tuned in a system like this before, and am just doing a bit of home work to spot any potential "gotcha's".
Only one drive will run at a time, and I'm planning to match parameters as a starting point with the working drive. The reason I'm asking is that recently there was a massive pressure drop when a fire hydrant was opened, and I wouldn't mind increasing the response time of the system to prevent this, and I'm wondering if decreasing the integral coefficient wouldn't accomplish this goal.
Are there any "gotchas" that this brings to mind or anyone or any specific info that I can give here to better define the problem?
I'm a bit new to this particular situation, and am just doing my homework before I blindly jump in.