Anyone here ever used a HYD02 for a proportional pressure valve?

Sure, it works great with an LVTD and a normal proportional valve to close a position loop, but I would like to use the second axis on this card to close a pressure loop as an axis.

I don't think the card will care because it's still controlling a -10 to +10 volt valve, but my only problem is finding an SSI interface pressure transducer feedback sensor.
Need an SSI interface with external interrogation and I believe 4 circulations. Anyone ever done this? What pressure transducer did you use?

HYD02's have MDT start stop interfaces, not SSI.
The M02AS has 2 SSI feedbacks
It you can convert the analog to SSI then you should be able to run a pressure PID.
You could also put an analog input card in the rack and close the pressure loop in the PLC and use the second control output on the motion controller in direct output mode. This will work if the pressure gain isn't too high.

Yes, your right Peter, I posted wrong. MDT start stop interface is what I am looking for. I don't assume they make a MDT start stop pressure transducer.

I am using a Balluf Rod BTL5 LVD for the position on the cylinder which is configured MDT. Thanks for catching that....I had SSI in my head because I was playing with an AMCI module. LOL
http://www.amci.com/plc-modules/plcmodules...i-interface.asp

I don't think there are any commercial analog to start/stop converters. I do have a solution that would be a perfect fit.
http://www.deltamotion.com/products/motion/rmc70/index.php
These are used on injection molding machines and presses where position control with a pressure override is required. The controller interfaces to the Rockwell PLC using Ethernet/IP. The controller looks like a SLC500 on the RSLinx network. The controller is also programmable so it can stand alone with just an HMI. We have customers that just connect a PV to a RMC75 and run a small press.

You would need a RMC75E-MA1-AP2

The MA1 can use either SSI, start stop or gated/pwn feedback. It is configurable.
The reason why the pressure module has two inputs is that it is often necessary to get the pressure from both sides of the piston or cylinder to compute a true differential force. One pressure input is not enough unless you know there is no opposing pressure on the other side of the piston. A ram needs only one pressure input. You didn't make it clear what you are controlling

Best of all. We know hydraulic controls.
We even have our own forum. oooh :)
http://forum.deltamotion.com
You can see it is quiet because we, our customers, don't have that many problems. I prefer the forum be just a place where customer can show off.


It isn't necessary to use recirculations any more. Back in the early 90s yes but today we can get 0.0005 inch resolution with just one interrogation because we have 120MHz counters. Using fewer interrogations is necessary because it takes time for the interrogation pulse to travel down the rod. This travel time limits how fast the loop can be closed so it is best to use just one recirculation or interrogation from now on.