Created Date: February 01,2020

Created by: williamflock

Hello,

I am writing a c# program to monitor the SOLO 4848 temperature controller and I hav everything working except when in the Ramp/SOAK mode I can't find a certain address.

In the SOLO Configuration program provided for the SOLO controllers there is a field called RAMP SET POINT that interpolates the ramp rate and displays the temp value the controller is trying to set at that moment (Not to be confused with the SET Point value), I can't find the correct address of this value in the manual.

Any help is appreciated.

Thank you

Created Date: February 01,2020

Created by: williamflock

Hello Bernie, RBPLC,

Thanks for the quick responses.

@PCLguy,... the current process setpoint (PV) reads the non-interpolated value.

@Bernie,... I am leaning in that direction, but I hope it doesn't come down to that, it's wouldn't be hard, just want to read what the controller is actually 'thinking '.

I'll call Tech Support Monday and pick their brains.

Thank you

Bill

Created Date: February 03,2020

Created by: Garry

https://cdn.automationdirect.com/sta...locontrolm.pdf

Section 7 - Modbus Protocol Registers

P3-19 Ramp / Soak SV -999 - 9999 R/W 2000~ 203F* 48193~ 48256* V20000~ V20077*

P3-20 Ramp / Soak Time 0 - 1500 (15 hours 0 minutes) R/W 2080~ 20BF* 48321~ 48384* V20200~ V20277*

The above parameters are taken from the table on 7-5. Set values and Times for each of the 16 steps.

Regards,

Garry

Created Date: February 05,2020

Created by: Tinker

H

@Bernie,... I am leaning in that direction, but I hope it doesn't come down to that, it's wouldn't be hard, just want to read what the controller is actually 'thinking '.

One might consider that the controller doesn't display what it "is actually 'thinking ' " on its own display. It only shows the value it is ramping toward, not the current point on the slope, so I'd not be surprised it the value is not available to the operator at all. It is a bit annoying if one wants to know how well the process is being controlled.

While I have used quite a few SOLO controllers in plain single set point applications, if I did need ramp/soak I'd probably use something else.

Created Date: February 23,2020

Created by: williamflock

Hello,

Thanks for the responses, I appreciate that.

I contacted tech support and basically got Garry's response.

I'm not sure if I communicated correctly because the responses seem to assume I want to get to my Set Point immediately, my applications use 'ramp rates ' to climb to the Set Point slowly.

{ "alt ": "Click image for larger version Name:\tsolo.PNG Views:\t0 Size:\t13.7 KB ID:\t128717 ", "data-align ": "none ", "data-attachmentid ": "128717 ", "data-size ": "full ", "title ": "solo.PNG "} ??

I set the time and temperature of the 'ramp up ' to a temperature as a 'step ' in a 'pattern ', this is based on a 'ramp rate ' of degrees per minute. I want to know the temperature value (Ramp Set Point) that the controller is trying to maintain during that 'ramp up ' at any time I query the temperature controller.

The reason I want this capability is if the monitoring software I'm creating crashes or is shut down, I can start up the software, and it will use a combination of logs and the current status read from the controller to resume where it left off.

The FREE software Solo Configuration that Automation Direct offers has these features, is it reading it or interpolating it? (see enclosed picture)

Again, thanks for the responses.

Bill

Update: I used a port monitoring program and there are undocumented registers: address 18213 will give me the current Ramp Set Point on register #7 when reading 8 registers... wonder why these are undocumented?

Update #2: Tech Support said the registers I discovered with the port monitoring software are 'duplicate '/redundant registers. I'm not sure why their own software would be using them. Please see my next post to get a list I got from from tech support that includes the values I needed.

Created Date: February 28,2020

Created by: williamflock

Hello RBPLC,

Here is what Automation Direct sent me, enclosed as a PDF. This has it all, well at least for what I need.

I needed:

Time left in step: the PDF includes two addresses as minutes or seconds.

Current Pattern and Step, defined in PDF as On going pattern/step.

Ramp set point, they call it Dynamic set value of ramp, in PDF.

I hope this helps others, and if it is in the manual, please tell me what page, I couldn't find them.

Thank you

Bill