from the Forum department...Intermittent comm loss on Bailey loop
Every few hours we get comm loss (magenta on graphics) on our Bailey infi90 system. When it happens, the whole loop is affected for a few seconds then starts coming back.
By Zacharia, Tomy on 30 March, 2012 - 3:32 am -
Assuming that the problem is with "optic fibre jumpering". Could you just break the fibre...
from the automation department...measurement of water level
Sudden drop in level ?
By Namatimangan08 on 28 March, 2012 - 2:34 pm -
> A DP transmitter is one method you can use to measure level in a tank whether opened or closed...
By Tshediso Mosia on 28 March, 2012 - 6:31 am -
A DP transmitter is one method you can use to measure level in a tank whether opened or closed...
from the Control Engineering department...Robust Controllers
To discuss about the modern robust controllers
> Can u pls suggest apart from LQR which other robust controllers can be analyzed in time...
from the Safety department...Safe Enclosures for Monitoring Devices
Will a device, sealed from air/gas intrusion be considered safe from fire/explosion as an ignition source?
A tank holding diesel is an unclassified location. See National Electric Code 514.3. Any fuel that...
Firstly I agree with Bob - you need the area classification checked out first. The short answer...
from the Example of modbus in PIC source code department...Need help in Modbus PIC code
Can anyone show me the Modbus RTU souce code in PIC ASM file?
By R.Jayapal on 26 March, 2012 - 12:16 am -
Thank you Bruce. Kindly send me also.I am in need for a project work. R.Jayapal ...
from the Forum department...Absolute encoder output
Difference between CANopen & SSI?
By Gabriele Corrieri on 22 March, 2012 - 3:27 pm -
Hello Ajinkya, the whole explanation is quite long and you've lost to tell us what it the...
from the Forum department...Most common connector for Modbus cabling?
Most common Modbus connector
I suspect you are actually thinking of a DE9 connector, not a DB9. This is a common error made by...
By Lynn August Linse on 16 March, 2012 - 9:25 am -
> I have done a lot of searching for modbus application to find which Modbus connector is the...
By Rob on 15 March, 2012 - 5:08 pm -
MODBUS serial is a SOFTWARE specification only. It does not require any...
from the DRAFTING department...PLC Panels Drawings Software
choice of software for drafting PLC panel drawings and loop schematics
By CarlD on 15 March, 2012 - 4:55 pm -
I can't find RevCloud for Draftsight either. Did you ever find a RevCloud for Draftsight or does...
from the New student department...Thermocouple compensation
How does compensation cable used with thermocouple, and can someone brief to me how does a smart transmitter compensate the unwanted voltage in thermocouple system?
By Ananth on 14 March, 2012 - 5:14 am -
Do you recommend Junction box for connecting the external thermocouple (J type). regards, Ananth...
from the Annoying Exceptions department...Negative Acknowledge and Bad Karma
How do you feel about security exceptions not being, you know, informative?
By Lynn August Linse on 13 March, 2012 - 2:10 pm -
>> I would not create your own code ... > On a more serious note, my product is doing...
By Michael Toecker on 12 March, 2012 - 4:12 am -
Julie, What product are you working on, and are there any other security enhancements you are...
By Steve Myres on 12 March, 2012 - 1:42 am -
> When Digi either gives their code away free, or offers me a job (hey, it could happen!), I'll...
> I would not create your own code ... since Digi sells generic Modbus bridging, we occasionally...
from the Private department...PeakHMI
PeakHMI and its ODBC feature
By Mark on 13 March, 2012 - 11:38 am -
Hello, I posted a very simple and short video demonstrating the ODBC In/Out port functioning...
from the Automation List department...AB 9 series CNC files
I have a project where I need to modify the AMP and
PAL files for a 9 series CNC.
PAL files for a 9 series CNC.
> You need to purchase the ODS software. Where can I buy these software?...
from the Automation List department...4-20ma and loop powered
4-20ma and loop powered
By peter on 12 March, 2012 - 10:37 pm -
get a signal isolator. Weidmuller make several varieties i'm familiar with, one that has 4-20 in...
from the Flow Measurement department...Gravity Flow Measurement
Can any one suggest the most suitable instrument for Flow measurement under Gravity flow conditions. The service is Produced Water after Crude Oil Separator.
By Bret on 12 March, 2012 - 11:58 am -
> If the water is pretty clean, I would use a Badger turbine meter. They work well and are not...
from the Control department...How to connect a Modbus slave device to PC when its address is unknown
Modbus RS485 to PC
By Andrzej on 12 March, 2012 - 8:19 am -
Hello, At www.modbus.pl you can find the Modbus scanner application. It helps find the proper...
> I have the same problem > please let me know if you find solution I have changed my...
By fereshteh on 28 February, 2012 - 1:59 am -
I have the same problem please let me know if you find solution...
By Lynn August Linse on 23 February, 2012 - 10:23 am -
You shouldn't need to know the registers to find the id, but will find it nearly impossible to use...
from the Consultants department...Scadapack32 RTU
Displaying ScadaPack32 RTUs data in DeltaV DCS
from the Forum department...Watlow F4 temperature control
Attempting to change the temperature of a temperature chamber through a Watlow F4 controller and a serial connection.
By matt on 10 March, 2012 - 9:00 pm -
I have written a pretty nice piece of software, it's available at Ebay. This has all the code you...
from the Automation department...Writing Modbus data to file
how to write data from modbus slave to data file using LabWindows/CVI
from the automation department...Wonderware Intouch Logging to Excel file more than 8 tags
I want to log more than 8 tags to an excel file by using hist_trend wizard in wonderware intouch.
from the Eng department...Mitsubishi Fx3U-16M
Questions about FX3U-16M and the Melsoft GX Developer software
By Les Jones on 4 March, 2012 - 4:38 am -
> 1.Can one do function block and sub-routines in the PLC with this software? > 2. Can GX...
from the on off circuit department...switching network
coin op switch to operate half of the time
from the OutOfTouch department...Delta V Application Deployment
Would like to know if Delta V supports client server architecture in the sense that any development on Engineering Station can be directly reflected on Operation Workstations within a click
from the Forum department...switch to sense air movement from blower
Please recommend a switch to sense air movement from blower
By Roy Matson on 3 March, 2012 - 1:51 am -
Why are you leaving the LP connection open to atmosphere? It should be connected to the duct also...
from the Forum department...Compatibility question 4-20mA signal
A question - can I connect a loop powered analogue output (2 wire system) to a passive instrument (positioner)that has a seperate 24vDC supply?
Hi Ernst, If this is a modern Positioner, it may be possible to configure it so that it can...
By Rob on 26 February, 2012 - 12:56 pm -
There is no TX in the original question - just a PLC output and a Positioner (which is confusingly...
so we take up a 24V source (forget PLC), the TX and the positioner, and make a loop. we take up...
By Roy Matson on 25 February, 2012 - 7:40 am -
Mr Smith left a very confusing question, I'm not sure what he meant by the term...
sorry, i mistook 24V of the postioner for the 24V of the TX, kinly ignore my previous post...
from the Modbus RTU department...Canopen Protocol issue
RS-485 is Same as CANOPEN Protocol, I Need a help?
By Heinz-Jürgen Oertel on 29 February, 2012 - 1:46 pm -
Hi, I can not answer all questions but one. CANopen can by no means be compared with RS-485. ...
from the CAD department...AutoCAD Electrical
EPLAN vs. AUTOCAD Electrical
By Logiccontrol on 28 February, 2012 - 1:55 pm -
I agree, ePlan is the best ecad product on the market. What will eventually doom them is that they...
from the Forum department...prime mover
how prime mover controls frequency
> how prime mover controls active power and frequency? Prime mover power? I'll let you...
from the Maintenance department...SERVO VALVE NULL Bias Current
SERVO VALVE NULL Bias Current
By Brad Zuercher on 26 February, 2012 - 1:12 pm -
Actually...a 4 VDC source over a 1000 ohm servo-valve force-motor coil will push 4 mA...not .4 mA......
from the Engineering department...Heat load calculation for PLc cabinets
I have to give inputs to HVAC engineer regarding the heat load calculations for the PLC cabinets...
By sanj on 24 February, 2012 - 3:28 am -
Hello to all, I am also doing calculation of air flow required to maintain the cubical internal...
from the DCS Application Engineering department...Honeywell CL Compiler Tricks
TDC3000 Compiler Switches
By Tim Haywood on 23 February, 2012 - 9:55 am -
If you use the -NL switch (no list) the compiler is alot faster as it does not generate the...
The trouble with doing something right the first time is that nobody
appreciates how difficult it was.