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Sample 8 bit CRC program
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By Lynn August Linse on 26 October, 2011 - 10:51 am -
Don't think in terms of CRC-CCITT etc - you'll find it HIGHLY misused and will lead you into...
By Daniel on 24 October, 2011 - 10:31 am -
There's a CRC calculator in excel that you may find helpful to understand how the calculation...
Thanks Kevin,
Unfortunately, I have a requirement to use ladder logic. What I am trying to do is...
By Eddie Willers on 24 October, 2011 - 12:52 am -
There is a sample program installed with RSLogix 5000 for Modbus RTU over the serial port; it...
By kevin grey on 23 October, 2011 - 7:59 am -
I am not sure what you are trying to do exactly, however I would suggest that you write the code...
Hello..
simovert drive parameter for overload.
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By aryan on 22 October, 2011 - 2:07 am -
No Response ??????...
By aryan on 16 October, 2011 - 5:17 am -
It is VC plus , version:3.4 ,with optional board : Slot A-CBP2 SW-2.23
My intention is to find...
By Gabriele Corrieri on 15 October, 2011 - 7:12 pm -
Hello,
which simovert MC or VC CU? Plus version or standard?
Please give the exact model,...
DDC w/ 1.8GB ram.?
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By Rob on 19 October, 2011 - 10:20 pm -
Who else is bidding on the project? Have a look at their product specs. ...
Is brushless motor the right choice for this app, which requires very low speed and torque control?
Sending modbus commands to a Public Address controller via a SCADA system.
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> You could put a Modbus serial-ethernet gateway at the PA controller end. This
> way the...
By Balaji on 15 October, 2011 - 4:33 am -
How is the SCADA system connected via RS485 to the PA controller? Computers generally don't have...
What is the effect on the motor of a power factor switch?
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By Bruce Durdle on 14 October, 2011 - 3:43 pm -
It is not advantageous to have a low power factor - ideally, the pf should be close to 1.
Once...
Could use some help on Libnodave after a colleague has left.
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By automation man on 13 October, 2011 - 12:46 pm -
It appears that you are trying to print the wrong values.
daveGetFloat retrieves a floating...
I need to ensure the parallel in a long tripper car.
If PLC outputs pass through ESD contacts, is it worthwhile to program the PLC to de-energize the PLC output during an ESD condition if the Hardwired ESD contacts handle it anyway? Is this considered redundant?
Need some help in program 6 OUTPUT Logic.
i want to use excel program to generate the volume automatically from the calibration tables
How to get 4-20ma Signals from different locations in a facility to a common point and transmit it on a Network
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By Dick Caro on 29 September, 2011 - 9:59 am -
First, it may not be necessary to convert the 4-20ma signals to digital form in the field. The...
How can I configure USB port in VB
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By Grace on 29 September, 2011 - 8:58 am -
this is my email address bratinella_mariz@yahoo.com.ph
>Give me your e-mail address and I...
from the Electrical engineer department...
Medium Voltage Variable Frequency Drive to Control the Speed of MotorI am electrical engineer by profession and currently I am doing research on medium voltage Variable Frequency drive (also called as VFD, VSD, AC drive, VVVF, etc.)
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By sanjay wani on 29 September, 2011 - 8:55 am -
I am electrical engineer by profession
and currently I wants comparison on medium voltage Variable...
PCS / System Integrators
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By Bob Peterson on 28 September, 2011 - 8:18 pm -
Take a look at the Siemens web site....
By Tom Bullock on 28 September, 2011 - 10:52 am -
Did you go to www.integratorguide.com and search for your criteria? They have 2,130 integrators...
4-20ma and loop powered
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By Anonymous on 27 September, 2011 - 3:19 pm -
techbas,
1. both AI card and transmitter do not supply power to tx, so external power is mounted...
By techbas on 26 September, 2011 - 12:35 am -
Guys,
I have one analog input card where 4-20ma transmitters are connected in two different...
It isn't clear to me how an isolator/converter can be for only "active"...
By Maria Meza on 21 September, 2011 - 3:53 pm -
Can an Active Device be used as a Passive Device? Or all 4 wire devices need without a doubt the...
How to select a relay and specify one to a vendor.
What type of cable can be used for Gas Detectors in Zone 0.
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By vinay on 23 September, 2011 - 11:17 pm -
dear khaled ,
fire retardants are meant to slow down the spread of fire. as copper does not melt...
What kind of technology is most suitable for liquid level measurement?
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By syurish on 23 September, 2011 - 3:52 pm -
A technology driven future trend is level sensors and transducers with frequency output:
...
I would like to measure diesel level in a tank of depth 6 inches with every 0.5 mm change. I would like to design a sensor. Please indicate any easy method for it.
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Yes, it isn't the best way to choose capacitance for such application. For tank level measurement,...
All the Vendors claim their offering is a true DCS and 'can perform the assigned role'...
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By Harshad on 19 September, 2011 - 1:18 pm -
i have heard that the latest version of T3000 is being developed to have functionality of both...
By harshad on 19 September, 2011 - 12:28 pm -
Referring to your point about Inter AS communication the latest version of SPPA T3000 or rather all...
Can anyone show me the Modbus RTU souce code in PIC ASM file?
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By Vijay Kumar on 16 September, 2011 - 3:32 am -
I need modbus routine in assembly language for 16F876/877 PIC microcontrollers. I would be very...
Simplex 4001 fire panel has master earth trouble
Has anyone been able to run Proworx32 on a server product? Been able to get it to work multi-user?
anybody using software "PLC workshop for modicon 32bit"?
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I am also looking for feedback on this product so I thought I would bump it to the top. This looks...
12 volts through switch to time delay relay to a coil
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Mate...what i collected is that you want to delay your 12 V signal by 3 sec after pressing the...
looking to dump HDA Data
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I used the OPC HDA Explorer for that:
...
from the OPD Data Acquisition and Reporting department...
Release of Genesis 1.2, OPC Data Acq FreewareGenesis 1.2 is the last release of a freeware used for OPC data acquisition, data saving (as csv) and data charting.
i need to establish the calculation to convert 2 x 16bit registers into a 32bit floating point
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By vip on 3 September, 2011 - 9:33 am -
> http://www.simplymodbus.ca/ieeefloats.xls
excellent, thanks you for link....
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