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Shielded, twisted pair (STP cable) is always recommended for 4-20mA signals. 2.5mm is more than enough to carry a milliamp DC load for 30m (probably good enough for a couple kilometers). But unshielded, non-twisted pair lacks the characteristics to limit electrical noise from industrial noise...

Given CAPEX you're talking about, you might want to spend 20 minutes looking at some the past threads on Profibus/Foundation Fieldbus. Remember, most people have a position to defend in a business sense. Some 15 year old comments...

Long shot - I have found that sometimes the Ethernet switch needs to be powered cycled to recognize the change in IP addressing for any given port. Again, it's a long shot.

Apparently no one with that direct experience is around to answer. My tangential experience with DCS is that any DCS vendor will gladly tell you (after 3 or 4 preliminary meetings) how much it will cost to upgrade and list out the hardware and software in a compact 20 page quotation. Since...

You might see if you can glean any advice from Emerson's white paper on the issue: https://www.emerson.com/documents/automation/white-paper-understanding-challenges-of-two-phase-flow-micro-motion-en-66308.pdf

The Magnetrol TA2 is a thermal dispersion flow meter, the typical technology recommendation for clean, dry gases. Is the hydrogen wet, carrying moisture that can condense on the probe? Condensation on the probe is always an issue with thermal dispersion. Have you consulted the factory...

I assume that 'calibrate' means configuration of the 4-20mA range for what 4mA represents and what 20mA represents. But I can't answer that question because there's no application 'context'. A transmitter was purchased for a given task. Is the measurement into the vacuum gauge pressure...

A lot of the development software (SW) for specific brands and models of PLCs either does not co-exist with other versions of its brand or with other brands of software. The SW author(s) assumes their SW has the sole presence on the laptop and it acts like it. That almost mandates that each...

From a deep memory I recalled the term barring. Check out this thread with an explanation: https://control.com/forums/threads/barring-or-ratcheting.31751/

I'm not a turbine guy, but I have no idea what the term 'barred' means. Could you explain what you mean by 'barred'?

I know of one plant in the midwest that tore out all its Foundation Fieldbus and went back to 4-20mA HART two years ago. The reason is that in the 20 odd years since FF was installed, those initially trained on it have left or gone on to other jobs and attempts to hire FF-experienced and...

2 days and no responses. I'm not a turbine guy, so I'll throw in some generic valve observations. Are the fuel valves proportional, modulating valves? If so, and this were a generic control issue, I'd suspect that - the actuator/valve linkage is not adjusted properly - the valve trim...

Be aware that the failure mode of an SSR is un-safe, an SSR can fail in ON state, continuing to conduct electrical power and the control signal cannot turn the SSR off. In the US, ovens, kilns, and furnaces are required by code to have a 'safety shutdown' contactor in series with an SSR...

If I understand what you, you are looking for field device's 'block' configuration data, but you can only 'see' the block's process data, the inputs and outputs. The description of your box sounds like a gateway/protocol converter that converts Ethernet/IP-to-Foundation Fieldbus H1. H1 is the...

There are dozens, if not hundreds, of brands and models of commercial, relatively inexpensive, stand-alone single loop PID controllers. In my experience they are better named temperature controllers because they're designed primarily for temperature control because that is the biggest market...

The answer to your question, "can I use this converter?" is I don't know and doubt anyone else does, given the lack of information. The presence of an RS-485 port is meaningless without knowing what protocol the port supports. RS-485 is just a data highway that carries binary bits back and...

According to their web page, the IOT9031B is a Modbus bus/protocol converter. SNMP is not mentioned and I know nothing about it..

The DCS world is closed world, where vendors require vetted registration before allowing access to documentation. As a worker bee, I am not a DCS owner/operator and hence I have no access to Yokogawa DCS documentation. Without knowing the details of that analog input card it's speculation on...

Depending on mounting and impulse line attitude and altitude, the transmitter probably 'sees' 4 in w.c of hydrostatic pressure when the pump is off. The display is probably configured for a 'scaled variable', a flow rate. A flow rate configuration probably has a low flow cutoff, which...

1. converter's COM port screenshot "Modbuspoll.png" I doubt that Window's Device Manager will report your USB/RS-485 converter's port as a "Serial over Bluetooth link". Pick a port associated with USB device. 2. Any reason you don't use the standard Modbus TCP/IP port 502? With Windows...