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> when you try to read address 4xxx01 from a device (4xxx01 is in the official modbus list of the device supplier) you should in your case actually read 1 address higher (!) It is the other way around. (4)00001 or (4)0001 is one-based addressing. The equivalent is hex 00 or decimal 0000 for...

3xxxx registers are Input Registers that are accessed (read only) by Modbus Function Code 04, not function code 03 Some devices map 3xxxx input registers to 4xxxx Holding registers, but there's no guarantee and your documention has 3xxxx Input Registers.

UDC5300 was a Leeds & Northrup product, inherited when Honeywell bought L&N. Make sure the controller is configured for Modbus, not Binary (a proprietary L&N Protocol), page 356, user manual UDC5300 has internal jumpers to enable RS-485 terminating resistors. See pages 358, 359 in the user...

It's a pretty narrow knowledge base on the S9000. Most users had service contracts. Honeywell had a dozen service guys nationwide who knew the system. Most retired prior to Covid but any who didn't were let go when Honeywell closed its service department about 3 years ago. I only ever...

These folks have the software and manual, but no converter and cables. https://www.controldcs.com/623-6226-honeywell-honeywell-ipc-620-winloader-programming-software_p21232.html These folks have the complete package...

Honeywell part numbers for Winloader are in the 2nd post in this thread: https://www.plctalk.net/threads/honeywell-ipc620-loader-on-xp.18783/ Requests for Winloader over the past couple years have gone unanswered on this forum and 4 other fora that I participate in. There's a couple YouTube...

What is the instrument? What's it do?

Your guess is as good as mine: Density ? Damping ? Differential ? Druck (pressure) ?

If Victron is a drive and Frontius is a drive and Home assistant, a Modbus master/client, writes to both devices, each a Modbus server/slave, how do two Modbus slave/servers talk to each other, successfully?

The SSR drive input needs a 5-32DC on/off control signal, but you've wired the SSR's control signal terminals to a set of dry contacts. Dry contacts are dry contacts, that have no voltage on them unless you connect a voltage source. So the relay clicks and calls for heat, but the relay...

Strictly anecdotal. From conversations with guys at the local ISA meetings over the years, 3 out of 4 plants along Rt 30 were using Magnetrol displacement or GWR in 2019 prior to Covid. I retired in 2020 and haven't been to an ISA meeting since.

Yes, that is correct. the LRV = 0.0mm H2O the URV = 3,222mm H2O total span = 3,222mm H2O

The specific gravity of the capillary fill fluid is missing. The level can only be read between the lower flange access point and the upper level. Hydrostatic measurements cannot read levels below the lower access point because the hydrostatic force of the liquid below the lower access point...

I don't recall having run into one either. Partial turn actuators have end stop limit switches and can typically be purchased with addtional, optional, external position switches and the optional position switches are totally independent of each other. I'm guessing that the complexity of...

Assuming this is about the S9000, a rack-based I/O Controller, there was a set of manuals for that system but Honeywell dropped all of the mnauals from its web site about 10 years ago. Some were scans of the original paper manuals. A link to a 2001 thread has a brief description of the...

> Just another waste of time from someone that joins and posts on the same day to never be seen again. There are very few posts on this forum as it is, maybe Ai generated to bump up the number of posts? I can state, categorically, that the site management does not generate fake threads or...

Why don't you post your logic so we can see what you've done?

Check out the last page of a vendor app note regarding special custom, "intensive" calibration of a particular RTD sensor, with claims of an 'AC' class accuracy over a very wide span of temperatures. https://reotemp.com/wp-content/uploads/2015/11/TBRTDTOL-0614RTDToleranceClasses.pdf

Zombie alert. 24 year old thread.