from the Forum department...CRC sample program
Sample 8 bit CRC program
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...
from the Instrument department...Process Safety Interlock System - Use of Flip Flop
from the automation department...simovert drive
simovert drive parameter for overload.
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,...
from the Forum department...DDC w/ 1.8GB ram.?
DDC w/ 1.8GB ram.?
By Rob on 19 October, 2011 - 10:20 pm -
Who else is bidding on the project? Have a look at their product specs. ...
from the "beginner" department...Question about torque at low speed
Is brushless motor the right choice for this app, which requires very low speed and torque control?
from the modbus newbie department...Passing Modbus Commands via SCADA system
Sending modbus commands to a Public Address controller via a SCADA system.
> 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...
from the Forum department...Reactive Power Consumption
What is the effect on the motor of a power factor switch?
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...
from the E department department...Libnodave help on extension
Could use some help on Libnodave after a colleague has left.
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...
from the Mine department...Sensor to ensure Parallel sides in a tripper
I need to ensure the parallel in a long tripper car.
from the Forum department...PLC Outputs Passing through ESD Contacts.
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?
from the Development department...6 OUTPUT Logic
Need some help in program 6 OUTPUT Logic.
from the ARC department...calibration tables of petroleum tanks
i want to use excel program to generate the volume automatically from the calibration tables
from the Services department...4-20ma Signals collection onto a Network
How to get 4-20ma Signals from different locations in a facility to a common point and transmit it on a Network
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...
from the Automation List department...How to configure USB port in Visual Basic
How can I configure USB port in VB
By Grace on 29 September, 2011 - 8:58 am -
this is my email address email@example.com >Give me your e-mail address and I...
from the Electrical engineer department...Medium Voltage Variable Frequency Drive to Control the Speed of Motor
I 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.)
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...
from the Forum department...PCS 7 System Integrators
PCS / System Integrators
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...
from the Automation List department...4-20ma and loop powered
4-20ma and loop powered
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...
from the Forum department...Specifing Type of Relay
How to select a relay and specify one to a vendor.
from the Instrumentation department...Fire Resistant /Flame Retardant Cables
What type of cable can be used for Gas Detectors in Zone 0.
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...
from the Forum department...What kind of technology is most suitable for liquid level measurement?
What kind of technology is most suitable for liquid level measurement?
By syurish on 23 September, 2011 - 3:52 pm -
A technology driven future trend is level sensors and transducers with frequency output: ...
from the Forum department...How to design sensor for diesel level measurements?
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.
Yes, it isn't the best way to choose capacitance for such application. For tank level measurement,...
from the Automation List department...Can Siemens PCS7 be considered as a True DCS?
All the Vendors claim their offering is a true DCS and 'can perform the assigned role'...
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...
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 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...
from the fire alarms department...Simplex 4001 fire panel
Simplex 4001 fire panel has master earth trouble
from the Forum department...Proworx32 on 2003 or 2008 Server
Has anyone been able to run Proworx32 on a server product? Been able to get it to work multi-user?
from the Automation List department...plc workshop for modicon 32bit
anybody using software "PLC workshop for modicon 32bit"?
I am also looking for feedback on this product so I thought I would bump it to the top. This looks...
from the Forum department...Time Delayed Relay
12 volts through switch to time delay relay to a coil
Mate...what i collected is that you want to delay your 12 V signal by 3 sec after pressing the...
from the Forum department...Free HDA client
looking to dump HDA Data
I used the OPC HDA Explorer for that: ...
from the OPD Data Acquisition and Reporting department...Release of Genesis 1.2, OPC Data Acq Freeware
Genesis 1.2 is the last release of a freeware used for OPC data acquisition, data saving (as csv) and data charting.
from the Forum department...reading 32bit floating point reg
i need to establish the calculation to convert 2 x 16bit registers into a 32bit floating point
By vip on 3 September, 2011 - 9:33 am -
> http://www.simplymodbus.ca/ieeefloats.xls excellent, thanks you for link....
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