Search results

Search everything Search threads Search blogs
You may enter multiple names here.
  1. O

    Brightness standard for indicator lamps

    Lighting standards generally refer to street/office etc. standard. EN 12464-1 “Lighting of .... https://www.zumtobel.com/PDB/teaser/EN/lichthandbuch.pdf There is UL E164353 https://uk.rs-online.com/web/p/pilot-light-complete-units/3308925 https://docs.rs-online.com/40e6/0900766b8010fd0c.pdf...
  2. O

    Servo Position Accuracy On Plain Surface

    There is a recent Control.com article on this issue. https://control.com/technical-articles/mechanical-motion-fluid-vs-electric-actuators/ It must be 20years ago I used Emerson electrical actuators on a worm screw giving resolution around 100 ångström units. The maximum movement I believe was...
  3. O

    simple modbus server device address question: if you can change it, is it nonvolatile; where stored?

    In days of old the number would be on dip or rotary switches and [ baud rate, parity, stop bits ] were whatever came with it ! Does this tiny device have some flash memory? Will it revert to the factory default setting unpredictably? Yes and if it ever did you would return as faulty.
  4. O

    FactoryTalk vs MarkVIe

    I wouldn't normally comment on GE Mark* control systems as not my area - but would take issue with CSA [as gilbertgrape87 has done] that PLC's are unsuitable for turbine control. I would however agree with most of his other sentiments. Siemens Turbomachinery [UK] has been using both Rockwell...
  5. O

    Capacitance of Intrinsically Safe Cables

    Mindful we had been producing IS Designs for many years - one apparently awkward end client [before commissioning] asked us to 'prove your IS Design is in fact Intrinsically Safe'. Once you have done the calculations you realise in hindsight: - never assume IS rated devices are safe - the hard...
  6. O

    Doubtful program.

    If there is no HMI then my conclusion is the internal flags are used on the Programming Terminal / by Personnel with access to the programming device. In the early days of data aquisition I added code which was useful to me on a distributed Mitsubishi 'A' series PLC that allowed me to fine tune...
  7. O

    Capacitance of Intrinsically Safe Cables

    The standards you refer to would not detail the point here. Most cables specify total capacitance (Intrinsically Safe or otherwise) rather than wirewire/wire shield. In my experience, the wirewire capacitance should be relatively small to be irrelevent. If it isn’t - maybe due to extensive cable...
  8. O

    Cylinder Position Sensors: Reed Type vs Solid State

    Historically reed switches were cheaper and a better option than proximity switches. They still are if reliability is of no concern.
  9. O

    Doubtful program.

    The short video shows what appears to be continuously running conveyors; with glue guns also continuously running onto the paper as it's moving up the machine. Servo instructions appear to be have been copied from a standard template...
  10. O

    Doubtful program.

    Can you provide a software printout and further detail of the process. " x0, x1, x2 These come from the encoder: x7 Home sensor " Does the machine start / run if any of these are disconnected.
  11. O

    Looking for a suggestion

    It's assumed you have a control system here - so unclear why you need a cyclic 16 stage counter. Or do you have 16 control systems, one for each station but no overall control ? Perhaps you can provide futher details with a sketch.
  12. O

    Terms

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  13. O

    Terms

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  14. O

    terms

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  15. O

    power system

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  16. O

    types

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  17. O

    technologies

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  18. O

    Types

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  19. O

    Reserve

    see: https://control.com/forums/threads/fundamentals.50304/ As you have accessed the internet perhaps you can search for details.
  20. O

    Fundamentals

    You might say the above is a starting point - but it seems to me you need to start studying basic electrical engineering - we did this at school. Obvious there is so much to learn that it would be impractical to 'detail' here. Having seen other threads posted - you need to convince us you are...
Top