from the Forum department...Field-bus Actuator Recommendation
Looking for recommendations for a Field-bus Actuator
You need a positioner with Fieldbus communications, not an actuator. The actuator does the...
from the Electrical & Instrumentation department...Unable to load DTM of HART Field Transmitter
The Preventive Maintenance Server can not access Rosemount HART protocol transmitters
Rosemount download site for DTMs for Rosemount instruments. http://tinyurl.com/qe6cfy8...
from the Instrumentation department...DP to Flow conversion
can we directly configure square rooted DP (4 - 20mA) from DP transmitter to flow
> And the max range of orifice is 120 m3/hr if my DP is 20mA then is my flow equals to...
Every 3051 has a parameter to convert the output of configured DP range from a linear DP output to...
from the Forum department...How to measure tank level through differential pressure
Differential pressure as tank level incorrect reading
I haven't a clue what your supplier actually provided. You need to ask them to be very specific...
Presumably this is liquid CO2 in a pressurized vessel? You probably have the wrong DP pressure...
from the Forum department...RS-485 Communications
RS-485 Communications with Standing Waves
Agreed, Curt does give great explanations. Oscilloscope for RS-485 differential signals - need...
In a word, yes. For a graphic illustration of such, look here: http://tinyurl.com/o6mbtwm ...
from the Forum department...EGD Protocol?
Looking for EGD protocol spec
90 page note on EGD protocol: http://tinyurl.com/ouhg4rs...
from the Engineer department...Installation of Pressure and Temperature Sensor for Orifice Flow Meter
Standard installation for Gas Flow Measuring with Pressure and Temperature compensation.
I just thought locating the PT static pressure tap at the high side DP tap and keeping a thermowell...
Thermowells are downstream of the orifice beyond the meter run length. Before multivariables...
from the Maintenance department...Endress+Hauser Level Transmitter Hunting
What is the possible cause for Level transmitter hunting?
Most all modern level instruments can be configured to indicate a high or a low level (or sometimes...
No one here can see your installation. We only know what you tell us, which thus far, is...
from the Forum department...Control Valve Positioner
Inlet air pressure of smart positioner is varying
The Azbil SVP3000 'smart' positioner is a HART 4-20mA current pneumatic valve positioner. The...
The inlet air is has a mechanical pressure regulator somewhere upstream. The changes in pressure...
from the Forum department...What kind of Modbus map lacks 4xxxxx registers
ASCII, RTU, TCP, now ABB?
from the INSTRUMENTATION department...Differential Pressure Transmitter Calibration
Changing the range of Differential Pressure Transmitter Calibration.
Tables A-1 and A-2 on pages 118-119 of the 3051 manual shows the LRL and URL range 'limits' (not...
from the modbus rtu department...rs 485 deep sea 7320
modbus rtu slave rs485
whoops, it's late. Correction to my previous post: 0406h is 1030 decimal. The one offset...
The DSE-7300 operator manual shows setting the Modbus slave address and the baud rate on page 70...
from the Forum department...Instrument Tech Training Topics
My boss has asked me to create a training program from the instrument techs that is one 3 hour course a month for 2 years.
Providing a list of suggested topics to your intended audience is a great technique to spur a...
from the Forum department...EDDL files stored in/on device?
Why haven't manufacturers figured out a way to store EDDL files in on-board memory of devices?
Isn't the EDDL the 1-2Mb file, a DTM or DD file, that defines the objects in a specific model that...
from the Forum department...Foundation Fieldbus - Linearization Type
Foundation Fieldbus Linearization Type
No, when the transducer's direct range (-1 to 2 bar) differs from the reported range (-1 to 1 bar),...
Borrowed from Anderson Instrument's FF transmitter manual (my comments in parentheses) Direct:...
from the Forum department...Vortex Flow Meter
Troubleshooting Vortex Flow Transmitter
Inlet pressure to the valve changes. With the controller in manual mode holding the valve at a...
from the Forum department...pulse scale factor
pulse scale factor
It appears that the repeatability of a given coriolis flow meter increased from 0.05140% to...
from the Automation List department...Electromagnetic flow meter problems
Totalizer reading on electromagnetic flow meter of chemtrols errors.
Most, if not all, flow meters have a setting called something like "Low flow cutoff". ...
from the Forum department...Measuring Flow with Annubar
Should pipeline be full of water for measuring flow with annubar?
To get a flow reading that is meaningful, the pipe needs to be full of liquid. The requirement...
from the AKH department...4-20 ma HART Transmitter
HART transmitter showing only 4 ma or 3.9 ma but it should show 12 ma as per process variable indicated in HART communicator.
Without knowing what the function of terminals 1, 2, 3 and 4 are, it's not possible to determine...
from the Thermocouple department...Thermocouple extension wire resistance
Thermocouple extension wire resistance
Not surprising, different alloys have different resistances. There are tables with resistance...
from the Forum department...Multiple Controllers on one RTD
How can I use the same RTD for more than one controller?
See the blog on this topic at the link below: http://tinyurl.com/mtaqm6f > Can I connect a...
from the Forum department...Modbus mapping registor reading at register plus 1
why the modbus mapping register is visible at register address +/- 1 address.
Guys who live in cubes write the code. Hence, it depends on whether the guy who wrote the code...
from the Real puzzler department...Thermocouple readings problem
Took temperature readings with J thermometer but only had K type wire!
Another control.com thread http://control.com/thread/1336501913 involved back calculating when...
from the Instrumentation department...Calculating LRV/ URV of a Bubbler Level System
How do you calculate the LRV and URV of a Bubbler type Level Transmitter?
Your bubbler can not 'see' any head pressure lower than its elevation, so you can not measure any...
from the Forum department...Modbus via microcontroller
Communicating with device via Modbus RTU through a microcontroller.
If it were me, I'd connect a PC with a serial port running a generic Windows Modbus 'test' master,...
from the instrumentation department...I/P positioner and I/p transducer Control valve
Difference between I/P positioner and I/p transducer
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
from the Instrumentation and Control department...Communication between Speedac NXT weighing Controller and Honeywell Scada
Speedac NXT controller is not communicating with Honeywell Server via RS 485 serial communication.
Was the former device communicating properly right up until it was replaced or is the replacement...
from the Automation and EMS department...Modbus Data transmission time
How to calculate time to receive data from slave to master in daisy chain connection of slaves, if my slaves are 20 and single master.
Mr. Linse, What's a rule-of-thumb value for RTU-TCP latency in a Digi Modbus bridge product? ...
You know - the word size, 11 bits - the number of words in the master message - silent...
from the Forum department...Actuator indication and control
How to obtain indication and control from a Rotork actuator
Other types of actuators use two drive signals: - one signal drives the actuator 'open' - the...
from the Forum department...Connecting Floboss 107 to DeltaV
Student with a project to connect a Floboss 107 to DeltaV for an HMI.
An analog output can't very well handle a totalizer value because of the lack of dynamic range on a...
from the Forum department...8-bit data types in Modbus registers
Are 8-bit data types obsolete for Modbus?
> Since registers are always 16 bits, does it even make sense to provide data types of 8 bits...
from the Forum department...Condensate pots and flow measurement
Using condensate pots for flow measurements
1. The purpose of condensate pots in steam flow measurement is to isolate or seal the transmitter...
from the Automation List department...Communication of UDC3000 controller with Experion
I have connected the UDC3000 controller with Honeywell Experion SCADA via RS485. I don't have a deep idea about UDC3000 controller.
Latest edition of Honeywell's Modbus RTU communications manual 51-22-25-66, Rev T, dated February...
from the Forum department...Connecting Honeywell UDC via Modbus TCP/IP to Modicon quantum
Connecting a Honeywell UDC temperature controller to Modicon PLC via Modbus. any ideas on this?
Latest edition of Honeywell's Modbus RTU communications manual 51-22-25-66, Rev T, dated February...
from the HC900-C70R department...Split Range Control on two valves - HC900-C70R
Split Range Control on two valves - HC900-C70R
The pressure transmitter is the input to an analog input function block. Its analog value is the...
from the Forum department...Problem in Modbus Master Simulation Tools
I'm having problem to communicate over Modbus RTU and TCP/IP frame with my computer using free softwares such as Simply Modbus Master 7.1 and TCP Client 7.1, and Modbus Poll.
It sounds like you just don't have a connection. RS-485 has some issues. The A/B or (+)/(-)...
from the instrumentation department...Loop calibration for 2 wire loops
Loop Calibration for 2 wire loops from calibrator that gives 24VDC loop output power
Can you do a loop calibration? Probably. But you're on your own figuring it out. Kusam...
from the Instrument department...ABB Thermocouple Transmitter reading fluctuates
Transmitters reading Fluctuating
6 different T/C transmitters with a 4 year history of proper operation which now fail-low...
from the Forum department...Tri-Sen analog output low
Tri-sen TS 310 controller that doesn't want to output a full 20 ma signal
Page 40 of the TS310 User Guide states that the voltage driving the output is 7 volts and that an...
from the Instrumentation & Control department...Liquid gas level measurement
Liquid Gas Level measurement
> But we noticed that when tank level is 15%, pressure is around 5 bar & when level is 50%,...
God may be subtle, but He isn't plain mean.
-- Albert Einstein