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D
Replacing UHF radio transceiver with Wifi
The original request was for a system to replace a radio/wireless "transceiver package". The Wi-Fi radios in the posts 2 & 3 are receivers only, not suitable for 2 way communication.
David_2
Post #2
Nov 29, 2020
Forum:
General Communications Chat
D
Auma valve closing command issue
My crystal ball is really cloudy today and I can't get vibrations on what your close command function is: mechanical switch? Foundation Fieldbus? Profibus? Modbus? Also no clue as to which model Auma actuator.
David_2
Post #2
Nov 25, 2020
Forum:
Instrumentation & Measurement
D
pH Probe Calibration in COLD Weather
Double Wall Glass Coffee Mugs. Ask your wife where the local Bed, Bath and Beyond store is.
David_2
Post #2
Nov 18, 2020
Forum:
Instrumentation & Measurement
D
invalid data decoding in Kepware OPC
1. You must determine whether the analyzers talk RS-232 or RS-485. Since RS-232 is point to point only, the hardware is likely half duplex RS-422 or RS-485. Getting the right hardware layer is critical. Read the manual for the analyzer and confirm which hardware layer it is using and wire...
David_2
Post #4
Nov 11, 2020
Forum:
Open Platform Communications (OPC)
D
invalid data decoding in Kepware OPC
1. The Phoenix Contact FL COMSERVER (serial-Ethernet server) has two models. Only one model supports Modbus, the 2313452. Do you have the 2313452 model that supports Modbus? 2. The DB9 connector is RS-232 only, so your RS-485 connection can not use the DB9 connector. Are your RS-485...
David_2
Post #2
Nov 11, 2020
Forum:
Open Platform Communications (OPC)
D
Mark VIe New Software Download to Gas Turbine
>"copy and paste" Maybe, but at your mention of "new Mark Vie software", what came to my mind, was when I was in chemical plant control room while the DCS vendor was doing a DCS software upgrade in the CD-ROM era (10 years ago) - 6 hours start to finish and the technician doing the upgrade used...
David_2
Post #4
Nov 9, 2020
Forum:
Power Generation
D
Transfer Function of a AC servo motor
As of today, This thread is over 15 years old, having started in 2005. A warning to those seeking Mr. Younkin's paper: providing an email address to a 15 year old thread is not likely to get a response. A web search reveals that Mr. Younkin died in 2011. You might want to try this link: Link
David_2
Post #10
Nov 4, 2020
Forum:
Motion Control
D
Hello everyone, can you pleases share the PLC software of RsLogix 500?
This forum does not support the piracy of licensed software.
David_2
Post #2
Nov 1, 2020
Forum:
General Automation Chat
D
Difference between core and pair cables
Analog circuit vs discrete circuit damage by surge It might be that most of my SCADA experience has been with analog signals but I've found in the half dozen near-lightning-strike failures that I've been involved with that the analog signal inputs and/or field devices were destroyed, but in...
David_2
Post #19
Oct 27, 2020
Forum:
Instrumentation & Measurement
D
I'm trying to figure out how this Automated Packaging System works from the video in terms of the sequence, the cylinders used and the instruments use
>It's assumed there is 0 PLC solutions for this particular system I think your assumption is wrong.
David_2
Post #2
Oct 25, 2020
Forum:
General Automation Chat
D
Have you ever connected dual element Thermocouple in parallel in the measurement loop for redundancy?
Thermometry references will state that paralleled thermocouples will report a value of the average of the number of thermcouples. A problem in practice with paralleling thermocouples is that since both thermcouples are presumably measuring the same location or point, both thermocouples are...
David_2
Post #4
Oct 25, 2020
Forum:
Power Generation
D
Difference between core and pair cables
1. drain/shield grounding CSA: . . . the shield drain wire(s) of the pair(s) should be grounded at one end only, and by conventions the shield drain wires should be grounded where the power in the wire originates (so in the Control Panel). Your site: The Drain wire was terminated at both...
David_2
Post #14
Oct 22, 2020
Forum:
Instrumentation & Measurement
D
Difference between core and pair cables
Surge or lightning protection is a whole field in itself. The web site explains some basics of direct strike lightning protection and also mentions that 65% of voltage/current surges are locally produced by switching of electrical loads like motors or heating systems...
David_2
Post #10
Oct 21, 2020
Forum:
Instrumentation & Measurement
D
Difference between core and pair cables
Near lightning strike
David_2
Post #8
Oct 20, 2020
Forum:
Instrumentation & Measurement
D
Difference between core and pair cables
If a cable is carrying low-level analog signals, the shield drain wires should be grounded at only one end. Grounding at one end only prevents any current from flowing between non-equipotential ground points, because ground current flowing in the drain wire or shield can couple into the...
David_2
Post #4
Oct 19, 2020
Forum:
Instrumentation & Measurement
D
Sensor to read silo level in tonnage
You don't climb the 15m silo to read the level in tons from the LR250 display readout, do you? Don't you want the level readout in tons down at grade level where human beings walk and talk? The LR560 is a loop powered 4-20ma HART level transmitter. The display on the LR560 can be...
David_2
Post #4
Oct 18, 2020
Forum:
Sensors & Calibration
D
Ratio Vs split range controller
ratio control: https://automationforum.co/what-is-ratio-control/ Split Range control: https://instrumentationtools.com/split-range-control-loop/
David_2
Post #2
Oct 17, 2020
Forum:
Process Control
D
Installed the wrong thermocouple but still worked
The analog input circuit always 'tests' the input for an open circuit, because thermocouples typically fail "open". But the presence of any Type thermocouple will pass the burn-out test. Most modern analog inputs can be configured for any of a number of different types of thermocouples...
David_2
Post #3
Oct 17, 2020
Forum:
Instrumentation & Measurement
D
Sensor to read silo level in tonnage
Converting to different engineering units is usually the role of the receiver device, a panel meter/HMI/PLC/DCS. I presume that this level device has an output, like a 4-20mA output representing the level in percent. Feed that 4-20mA signal into a panel meter (or your programmable receiver)...
David_2
Post #2
Oct 16, 2020
Forum:
Sensors & Calibration
D
Honeywell 620 Software
This 15 year old thread has a part number for the last version of Win Loader. I would not hold my breath anticipating a response from Honeywell though. http://www.plctalk.net/qanda/showthread.php?t=18783 Maybe someone here has an old copy and will show up with it.
David_2
Post #2
Oct 15, 2020
Forum:
Programmable Logic Controller - PLC
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