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  1. D

    DCS has an unused AI channel

    The two pins for an active analog input are - a terminal that supplies +V (usually 18-24Vdc) from a DC power supply to a 2-wire, loop powered transmitter - the (+) analog input An internal dropping resistor connects to the (-) of the analog input and the (-) analog input is then internally...
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    honeywell s9200e

    See the link below for the scarcity of advice for this long-obsolete controller. https://control.com/forums/threads/udc-9000-multipro.55041/
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    Modbus communication between two masters

    The ETH-1000 works as described.
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    Experion Loop Tuning Help Needed For Nuclear Gauge

    I've never seen an Experion DCS, but it looks to me like the loop in manual mode (PID block > mode). If that's the case, then conveyor speed is fixed at some manually established value. The variation in PV as shown in the chart is likely the varying density as the material passes the nuclear...
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    Bye-bye Modbus? No more free downloads of the Modbus specs

    There are sites other than Modbus.org that have posted the Modbus standards, but if you need to reference the standard at some point in the future you might want to grab it now and save it. Modbus RTU Standard Modbus Over Serial Line Specification and Implementation Guide, V1.02...
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    Bye-bye Modbus? No more free downloads of the Modbus specs

    I went to find the download link to reply to someone inquiring about Modbus RTU CRC and was quite surprised that Modbus.org has removed its published specifications/standards from their formerly open, freely accessed web page. I thought maybe it was just a simple registration to get access, but...
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    liquid N2 at -192.3℃ flow flow measurement

    USA's NIST paper on Cryogenic fluid measurements provide limitations of various technologies: https://trc.nist.gov/cryogenics/Papers/Review/2015-Cryogenic_Measurements.pdf Google is your friend when seeking liquid cyrogenic flow meters. This site claims multiple technologies for liquid...
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    ION 7550 Modbus point

    Most Modbus slave/servers that are field devices do not have editable slave maps. PLCs, PACs, DCSs, wireless gateways are more likely to have an editable slave/server map.
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    Help Me- I Get 10 Degree Celcius Deviation In Tia Portal V20

    Cold junction You can't have both internal reference junction AND Fixed reference junction. One or the other. You want Internal Reference Junction because that is continuous measurement of the cold junction reference temperature. Fixed Reference is for metrology triple point icebath...
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    Units converter

    Pretty comprehensive set of converters
  11. D

    Modbus Simulator Software (Master/Client)

    I'll give it a try and report back
  12. D

    IFM Pressure Sensor Signal Issue

    The "Getting Started with 4-20mA" manual for the 6ES7331-7KF02-0AB0 module is here: https://cache.industry.siemens.com/...1_ai_8x12_bit_getting_started_en-US_en-US.pdf Note that there's a 'measuring range D' for 2-wire current signals, one for each pair of input channels (page 16) Page 22...
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    Remote IO using rs485 (or twisted shielded pair) with 4-20ma on both ends

    ICP-DAS has a so-called "pairing" solution. In wireless, I called it "wired-in/wired-out" with analog or digital inputs one on end mapped to corresponding analog or digital outputs on the other end. This is the wired version. ICP DAS's 'pairing' is where one module 'pairs' its outputs with...
  14. D

    Applying Hart communication across 2088 pressure transmitter using DS8500 hart modem

    Maybe the DS8500 needs the ancillary circuit components as shown in Analog Data's data sheet:
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    Applying Hart communication across 2088 pressure transmitter using DS8500 hart modem

    Your connections diagrams are confusing because they show 4 terminals, not three. You mention a 2088 transmitter, presumably a Rosemoount 2088. Presumably yours is not the 3-2ire low power model, and your is the standard loop powered 4-20mA HART model. The HART 4-20mA 2-wire loop powered...
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    Applying Hart communication across 2088 pressure transmitter using DS8500 hart modem

    Sounds like you're trying to use the DS8500 as a HART master to read HART on a 4to20mA loop signal. Have you implemented the suggested circuits as shown in figure 8 on page 6 of the Introduction to the DS8500 chip...
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    Struggle to Communicate with Various Energy Meters on the same Cable

    Does the bad boy meter have the Modbus RTU option installed? Is the Modbus RTU option enabled? Is the polarity [(+)/(-) or A/B Labeling] of the RS-485 driver lines the same on the different models, or did the polarity get reversed in the model change? Did the wiring get reversed from the...
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    Annubar Flow Meter

    DP might have a high value for Low Flow Cutoff.
  19. D

    Energy Metering Communicating Gibberish & Incorrect Info over Modbus RTU

    Suggestion for Windows' Modbus Master Client app: Open Modscan https://github.com/sanny32/OpenModScan/releases/tag/1.6.1 Configure the Connection: Connection > Connect Configure the display for either - Data (decimal, binary, hex) [recommended] Setup > Display options > Show Data...
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    Energy Metering Communicating Gibberish & Incorrect Info over Modbus RTU

    Current sensing involves some kind of current sensor, CT, hall effect, whatever, that wires separately from the voltage sense conductors. Are current sensors installed and connected?
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