Hmi Wonderware

[Clara Zellinger]

Iknow this is a very specific question, but I'm hoping someone can help resolve this issue. We are hoping to start pulling in information from our PM8000 to our SCADA system using wonderware. I am using the default modbus registers. I have good quality in the connection to the device but only certain tags are pulling the correct information. For instance, Current A is pulling as an integer, Current B as a Float, and Current C and Current Average are showing 0. I am attaching the setup from System Management Console. Has anyone else encountered this issue? Volts mode is setup as 4W-WYE

Are you sure the master is polling Current C and Avg current? Lots of masters intializes holding registers (the tag for data it receives) to a value of zero. If not polled, the master register shows its initialized value of zero.

If you are using one based register numbers and mixing that with zero based numbering, you might be reading and interpreting the wrong set of registers. 32 bit floating point values require two adjactent registers, for instance Current B uses 43002 and 43003.

When attempting to read 43002 and 43003, you might be off by one and getting 43001 and 43002. The word/byte order changes when that happens, but I've seen where the resulting mixed-registeer value appear to be close to what it should be, yet be incorrect.

If it were me, I'd try disabling the zero based addressing function and then do whatever is necessary to try alternative word/byte orders until something reasonable appears and whether you get full FP values.

To expand on what PV_DAQ has said, have you tried to read the registers from the device with a modbus client other than the system you are using? tester.exe for example or modbus poll, ModScan etc. The idea would be to poll registers to get the explicit 16 bit values (some modbus clients can convert these into 32 bit floating point values for you). The point is to very that device is responding to modbus polls as expected. There are also online tools that can help you convert hex numbers into floating point numbers -schmidt.net/FloatConverter/IEEE754.html

regards,

Hi, i would like to ask about the setup for wonderware scada and ewon, will i have a direct access for plc tags using ewon to be linked in my wonderware scada? or will i still require another platform to interpret my plc tags and be directed in my wonderware?

I'm working on my final year project at universty. Topic is SCADA systems based on wonderware Intouch and Schneider PLC and I need help :D. Could anyone tell me how can I manage recepies? For example, I have to make a recepie that put one component in tank, than mix it for some time, and after that add second component in tank, so my recepie must contain time pause between adding compnent1 and component2. I couldn't find anything on yt, Google, or user manual, so can anyone help please. Thank you.

and advice I will give is that on industrial automation topics just stick it to the manuals, on this world, everything is brand driven and even each brand has different versions of software for their products, even with its implementation of certain things and everything can communicate to everything using standard protocols (which is hardware dependent most of the time).

so, first, you need to know the devices you are using, and how to communicate them.

Wich PLC model, this PLC wich communication protocols have.?

On wich software is programmed? chances ara that there is a recipe option already built in.

And for the recipe, it's a simple thing pretty much just do a program and have values of "dosages" and "timers" the "RECIPE" is in fact that sequence of values and times you can make the recipes by itself stored on the memory of the PLC and SCADA only acces to those register and updates the values.

In my industrial automation course, the professor showed us the FESTO's didactic modular production systems, then threw us the manuals and says each team need to make one of those work

"Here are the manuals we will see again on the final test. by the way Half of the score will be that the systems work properly and after that you are going to leave the lab, then I will be messing around with the systems, unplugging things swapping wires, whatever I feel like to do, and you will need to troubleshoot".

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