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@Doeydecentra Please do not start a new thread for each and every question that you have on the same topic. Instead, Post successive questions on the same thread as if your next question were a reply. This standard forum protocol and procedure. -Moderator

If you have confirmed the 8mA signal by putting a milliampmeter in series with the loop wiring, then the transmitter is doing its job properly because, as you say, the 8mA is proportional to the pressure. There’s sufficient voltage and the fuse is good. The issue is at the receiver end...

The device vendor supplies the information as to what data resides in which Modbus register (usually described as a 'map'), and usually describes what the format the data is. There is absolutely NO general, industry-wide assignment of data to Modbus registers, the assignment of data to...

Why do you expect static or fixed data? Why should any poll provide "the same data"? Have you configured static registers somehow in the RTU's so that the data never changes? Can you give examples of how the data is changed? What value do you expect? What value are you getting? Are all...

If the other nodes are not communicating via Modbus (not using the Modbus card) and the controllers are 3300's, can you cannabilize or scavenge the comm card from one of those and use it?

The three digit field in the model part number has one digit for a comm card. If there were two comm cards, one for ASCII and a different one for Modbus RTU, then the model number would have had one numeral for ASCII, a different numeral for Modbus. But there is only one numeral, in this case...

That ASCII card (if that's what it is) was added to a basic UDC 3300B, as indicated by the model number on the case label in your first post. The selection RS422 enables the ASCII protocol (the pdf conversion of the manual apparently screwed up the Parameter Definition column; the distorted...

Just realized your nodes are slave node ID's, so that's covered OK. The Comm setting for Modbus is RTU, multidrop, therefore RS-485.

The protocol that is intended to be used is Modbus, because the Prosoft MV156E-MCM is a Modbus module. The UDC330B also had an earlier proprietary serial ASCII protocol, but you select MODBUS under ComSTATE to get Modbus RTU. I think one of your problems is the parity setting. The note in a...

Moon phase phenomenon?

It isn’t clear exactly what the problem is. When the door is closed, does the 815 turn on/power up? Why did you disconnect wiring and do the checks?

I saw a similar tank farm situation with all the 4-20mA level transmitters wired to a Precision Digital Consolidator Plus box that had its own HMI screen. The location of the Consolidator in the tank farm made it suitable as a local panel readout for four of the tanks. A Modbus/TCP client in...

The 106 is just a thermocouple process alarm unit with a thermocouple input. When it gets to setpoint it trips. And the relay changes state. The 106 manual, section 3.4, (page 5 pdf) shows that terminals 5, 6 and 7 are a Form C relay output: 5 is COM, 6 is N.O. and 7 is N.C. Important...

Ironically, I got an email offering “Master the mystery of vibration application engineering“ today. I have no idea about the Link’s content, but its teaser matches your interests...

Wired HART is WAY too slow: 2-3 updates per second. I don’t know what the wireless HART update rate is, but - it requires a proprietary gateway just to get data into Modbus server registers. - battery life/replacement is a serious issue Take HART off the table.

> I read making the rx3i be the master requires more programming (like COMM_REQ Programming a Modbus Master/Client is usually more work than dealing with a Modbus server/slave. A client/master always needs to issue the polls/commands and needs the programming to handle multiple...

Standalone, single loop PID controllers like Eurotherm usually function as a Modbus/TCP server (slave) only. There’s nothing that prevents a PID controller from being a Modbus client if the manufacturer provides the firmware for such; such is just not common. You need to confirm that the...

A quick skim read of the manual at this link https://manualzz.com/doc/6762941/vision-2020i-user-manual-vision-2020i---dunham says that Carel uses their own dedicated HMI, a DBGx Display that communicates with other Displays over the "DB LAN communications bus" which is very likely an RS-485...

Have you motified the vendor and asked for troubleshooting and analysis help?

I vote for the ICC Mirius Gateway.