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  1. C

    InduSoft host stopped talking to ControlLogix PLC in Dresser-Rand compressor package

    if I had to guess, it's probably the Add on...check if there is a newer version. ....that would be a step in the right direction, If it's a like-for-like function then easy peasy.....also be careful that RSLINX is not somehow involved in your communication,,, sometimes there can be OPC or some...
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    InduSoft host stopped talking to ControlLogix PLC in Dresser-Rand compressor package

    Sounds like when you went back to the original firmware...it didn't revert back to it original state. Probably have to reload the plc with the original software. ...i.e make it exactly as it was....that's if you made a backup...and not a backup from xx months ago. And you download it with the...
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    RS232 to ETHERNET COMMUNICATION

    1761-NET-ENI I've used this in the very distant past.....
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    An anamoly in PI Speed Control

    PM me and I'll send you something
  5. C

    An anamoly in PI Speed Control

    Hey 2000 How you getting along did it help... It's nice to see somebody who has some interest in motor control...it's not an easy topic
  6. C

    PRE DESIGNED PUMP CONTROL PROGRAM

    I'm sure if you provided a spec of what you want somebody could help you. That's some manhours to developed a full program... as oneye14 said the software above looks straightforward....but it's not going to be like that. There will be all sorts of other requirements ...HMI...motor...
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    An anamoly in PI Speed Control

    increase the P term to make it unstable....maybe it is just a tunning issue...but I doubt it you seem to have the speed loop tuned. I...if you can get it oscillating above and below the set point then probably just a tunning issue. are you using the cross product for the torque calculation...
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    An anamoly in PI Speed Control

    is that a PID ? what does your Stator flux look like in the alpha and beta it should be a circle?
  9. C

    An anamoly in PI Speed Control

    PID AND PREDICTIVE CONTROL OF ELECTRICAL DRIVES AND POWER CONVERTERS USING MATLAB®/SIMULINK This might be of some use to you...I don't have that ref doc you mentioned
  10. C

    PLC Tribal knowledge.

    That's most probably a state machine, there is a way to express it as a matrix....I've got the detail knocking around somewhere. The behavior doesn't shock me I see it often, primadonnas, that's the OEM's fault for allowing this behavior but I've also seen OEM protect their code through...
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    PLC Tribal knowledge.

    Thanks for the reply....I know, this is why I posted the question...I'm trying to see what the tribal rules are? I'm very aware of the ins and outs of dealing with badly thought-out code...I've made a lot of money doing this...but it's not really the nature of code it's to do with people. What...
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    PLC Tribal knowledge.

    Over the years I've seen what is considered to be the correct way of programming a PLC. A couple of examples; double latching is considered a no. The other one that I hear a lot, the software should be simple enough that the maintenance guy/gal understands it. I've put up two points ...latching...
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    An anamoly in PI Speed Control

    Did you make any progress?
  14. C

    An anamoly in PI Speed Control

    let me see if I have that....
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    An anamoly in PI Speed Control

    Hi 2000 What document are you referencing?
  16. C

    Keyence camera cv x machine vision/sensors and AI

    Yes, I've used Keyance all depends on the application, I just run some digital IO, if memory serves me correct you set up a program number in binary, trigger it, and then get a result back pass/fail. The front end was dead easy they have various algorithms that you can set up. That's a very...
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    Keyence camera cv x machine vision/sensors and AI

    I've had some dealing with vision systems..some years ago...if I can help. Saying that there are vision experts out there who know a lot more than me. I believe Cognex is the usual choice as it has C/C++ The library that they use is usually OpenCV which is basically an open-source library...
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    TwinCAT 3 Error When Switched to Run Mode.

    to all ....best you run that system on a VM machine, I used it and it killed my machine
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    Automatic Irrigation System

    you might want to consider a hysteresis controller ...that's what it sounds like on your control system..this should also sort out possible debouncing issues on your set points. Google 2 term hysteresis controller ...you set the high and low points and dead band window. It's probably the simpler...
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    Answer to another set of posts.

    I don't follow what you've done but doesn't seem to make sense. ...not all snubbers are equal. Have you googled a device called MOV "in snubber circuit" this is a different take on the snubber circuits, you could combine the resistor-capacitor circuit and MOV. If it's possible you could measure...
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