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PLCs
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
Thermocouple Temperature Drops Suddenly
Originally posted by Litto on 22 September, 2014 - 2:06 am
Unexplained temperature drop while process is running
New Replies:
A drop to 100 is indicative of a short creating a false junction. A drop to zero is indicative...
If you are dealing with 950C as opposed to 950F, it could be a problem with the thermowell or the...
Somewhere between the hot junction and the analog input there's a short circuit in the extension...
Originally posted by Psahu on 18 September, 2014 - 10:49 am
Are controller tag details for control logix is available on ethernet/IP? Using 1756-EN2T module in controller chassis for communication.
New Replies:
Psahu, It is depend on what third party devices you would like to connect. Can you be more...
The Ethernet/IP protocal is well defined in the spec for it. Best bet is to either buy the spec and...
Topic: PLCs and related questions.
from the Forum department...
Yokogawa DCS Analog Module AAI143
Originally posted by Ariel on 15 September, 2014 - 2:45 pm
Difference between analog mA value and their correspondent raw value.
New Replies:
I checked the Tunning parameters and there is an error. Maybe is a good idea to do an offline...
Tunning-Raw Value should be
 4 mA    ----> 0%
 6.16 mA ----> 13.5%
 8 mA   ...
Recently there was an unresolved thread involving the same model Yokogawa AI, here ...
Topic: Engineering and workplace issues.
from the Forum department...
DCS analog input problem
Originally posted by mahmoud fawzy on 4 September, 2014 - 7:10 pm
DCS Analog input signals didn't work with ADAM card
New Replies:
Mr. Fawzy, That's a very interesting observation. A common for all channels is what allows...
Hi David, I got one information form yokogawa training material that last number in AI/AO cards...
Hi, David >Given the nature of what you've reported thus far, I can't predict > what will...
Given the nature of what you've reported thus far, I can't predict what will happen if you connect...
Topic: PLCs and related questions.
from the Instrument and Control department...
Siemens S5 CPU 922 Run and Stop LED Do Not Turn ON
Originally posted by Syed Waqar Azeem on 11 September, 2014 - 1:05 am
Run and Stop LED on front of Siemens S5 922 CPU doesn't turn ON on powering of rack. Only BASP LED on front of CPU is turned ON.
New Replies:
We have started getting a fair number of service calls for S5 units. They are closing in on thirty...
The only thing I can think of is that the Rack is faulted. The backup battery may be missing or...
I have tried doing cold reset and warm rest on processor. The situation remain as such. Both STOP...
Have you done a cold start by holding the reset switch up and cycling the run switch from stop to...
Topic: Communications systems and equipment.
from the ModbusTCP department...
PROSOFT MVI56-MNET Slave Response Time
Posted by Cris on 17 September, 2014 - 2:27 pm
PROSOFT MVI56-MNET communication response time and performance
Topic: PLCs and related questions.
from the PLC comm error department...
TSX Premium PLC Problem
Originally posted by visitor on 16 September, 2014 - 7:29 am
Telemecanique TSX Premium PLC unstable operation
New Replies:
Thank you very much for your answer. I got contact with local Schneider representatives. They...
This could be programming......hardware....etc. etc. Without being online with the plc when this...
Topic: Communications systems and equipment.
from the Forum department...
RSLinx issue in VMWare WIn 7 32 bit VM
Originally posted by Paul on 11 September, 2014 - 11:28 am
I can do a serial upload and download but I cannot go online with RSLogix 500 inside a VM running WIn 7 32 bit
New Replies:
I just got the 2 port version and it works like a champ. Upload, download and online. Thanks! ...
Years ago I had trouble with VMWare and a Keyspan USB to serial device. I switched over to a Gearmo...
Posted by Psahu on 17 September, 2014 - 10:20 am
Communication not getting established between Yokogawa (ALE-111) and Control logix using Ethernet/IP.
Topic: Sensor technologies.
from the seeking product recommendations department...
Modbus TCP temperature monitor
Originally posted by mooseo on 28 February, 2011 - 2:09 am
I'm looking for a product recommendation
New Replies:
I am looking for much the same thing, a simple temp and humidity for my server room. I just want...
Topic: PLCs and related questions.
from the Forum department...
Upgrading Yokogawa CS3000 R3 DCS
Posted by Khalid Ur Rehman on 16 September, 2014 - 12:36 pm
Our existing DCS is only compliant with Windows XP HMI's having Vnet communication. What is the best way to upgrade the system for compliance with Windows-7 and having Vnet/IP communication?
Topic: PLCs and related questions.
from the Process Control department...
Proficy Machine Edition 8.0
Posted by Chris IWO on 14 September, 2014 - 10:56 pm
Proficy Machine Edtion 8.0 and 8.5
Posted by rbhadani on 14 September, 2014 - 5:39 am
Issue with Communication between Triconex PLC for SOE and Matrikon OPC server using TCM Module
Topic: PLCs and related questions.
from the Forum department...
Voltage Levels in DO Cards of PLC
Originally posted by Mihir Ramkrishna on 12 September, 2014 - 12:45 am
Which DO cards are better from the Reliability perspective - cards 24 VDC or cards that give 110 VAC?
New Replies:
My take is a bit different. DC are the most reliable in most circumstances. Solid state outputs...
The most reliable will be 24VDC transistor outputs. Relays have a lifetime. Triacs are in the...
Topic: Software, including programming, OS issues, etc.
from the Electrical Engineering department...
Communicate ER300P energy meter with PLC
Originally posted by Ummachan K.Joson on 7 February, 2014 - 3:43 am
How do I enter programming mode and communicate ER300P meter with PLC SIEMENS 200?
New Replies:
I communicated the meter with PLC. Changed the Meter ID using PLC program. The Values or the...
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Concept 2.6 Compatiblity Issue
Originally posted by Anurag Purohit on 11 September, 2014 - 2:55 am
Running windows 8.1 64bit OS and have a concept 2.6 compatibility issue.
New Replies:
Concept 2.6 is a Win-16 program. It still runs on new Windows OS's but only the 32-bit versions. ...
Sorry for the bad news: Concept is a 16 bit application and has not/will not be qualified on Win...
Topic: Sensor technologies.
from the Instrumentation department...
ABB Flowmeter -Flow Data Is Less
Originally posted by sandeep on 11 September, 2014 - 6:27 am
flow meter data is less compared to other flowmeters
New Replies:
what are the units for the 20 mA value? how long does it take for the 1 meter level change?...
>> "flow meter data is less compared to other flowmeters" >other flowmeters? ...
> 1) Is this a new installation or a new problem with an existing, previously satisfactory...
> "flow meter data is less compared to other flowmeters" other flowmeters? ...
1) Is this a new installation or a new problem with an existing, previously satisfactory...
Topic: Engineering and workplace issues.
from the Automation List department...
Why 4-20 ma is used in Analog Signals?
Originally posted by sreeraj on 3 June, 2007 - 12:25 pm
Why 4-20 ma is used in Analog Signals?
New Replies:
When I began in the power industry several years back there were two commonly utilized current...
>> Why 4-20 ma is used in Analog Signals? >> How come ISA selected this. Why not...
Topic: Software, including programming, OS issues, etc.
from the Modbus RTU Slave Simulation department...
Modbus RTU 2 slaves simulator
Originally posted by Vlad S. on 5 September, 2014 - 4:02 pm
How to simulate two Modbus RTU Slaves
New Replies:
ModMultiSim (see http://wingpath.co.uk/modbus/modmultisim.php) can simultaneously simulate two (or...
Posted by wahidul islam on 8 September, 2014 - 3:14 pm
PLC system binary signal is unlatch valve instead of holding
Originally posted by Thota on 7 September, 2014 - 6:04 am
Motor driver converts the pulse/direction signals to the proper A and B phase signals for the motor, but does not reach maximum speed.
New Replies:
You need check some following issues: 1. Do PLC output pulses have amplitude and width according...
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