nic00

The actual article was in new scientist (7th March Edition) on pg 20 written by David Robson

Off topic here.. Was just reading an article on solar cells and about quantum dots, Making the solar cells much more efficient. Are u involved with this kinda thing?

What does everyone use to backup there scada clients? Currently using acronis but seems to take forever..

Absolute zero and u have free energy ;)

Who u logged is as on the 2k machine?

In your PLC use the service request #7 for reading the date/time of the PLC. The service request write the date/time into 5 or 6 word. In your Cimplicity project, create points to read the date/time words. Create a periodic Event launching a script. In this script use the Date function to set the PC date/time. Thats what i found from google, dont know if its any help :)

ITSGONNABLOW.wav ^_^

If u cant change the sound via RS View cant u just replace it with the audio file u want to play and rename it?

How come you did your NVQ 3 in mech maintenance? As i see you have done ONC in electrical, Are you multiskilled? I did HNC after ONC and really enjoyed it, if you want to do it defiantly do it!!

Would a ps2pdf convertor do the trick? If so check this out http://pages.cs.wisc.edu/~ghost/doc/gnu/5.50/Ps2pdf.htm Also is it a one off thing?

Going to be giving this a look in the next few minutes

If a PLC has relay, that has a drop out current rated 30^-3. Does that means the relay will stay at its relevant state of play when power is switched off then when current drops below 30^-3 that states reverts back to 0? Sorry if this seems to be a bit of a novice question, wanting to make sure im on the right track

Here is what the question was based on; A relay PLC switch has an inductance of 2H and resistance of 4Ohms. It has a current of 0.5A, when switched off Determine the time for the relay to drop out when the drop out current is 0.1A I get something like 804.72ms

Did actually enjoy reading that, nice post

Thanks very much guys

Thanks for the info guys. A friend PM'd me this a few minutes ago too (just to throw it in) James says: if i remember correctly... and dont quote me on this... but isn't it to do with spikes on a current signal

i couldnt find anything on it either. Maths tutor has had to take over the PLC lesson due to illness and on an assignment it states about dropout current within a relay and he wondered what it was. Couldnt find anything about it in my Bolton PLC book, so i thought i would ask you guys here. Sorry if you dont understand

Happy New Year all

Isn't DARPA related to the SR-91 (Aurora?), have a vague memory of reading something about them in relation to the aurora

Were just about to switch to ultrasonic but in regards to flow

There u go, there are a few minor mistakes but no major biggies. Be Gentle Please :( Ive had minimal PLC programming experience ie LD x0 OUT y0 really

I have been given a project to do (explained below), this is the first major project ive had to do. So far i have coded the water mixing by using multiple timers and ORB'ing them to create an output on the valves. But im stuck on how to proceed further especially the part on spin cycle - Where if vibration is detected slow forward/reverse kicks in until vibration is not detected and the fast forward cycle continues its timer (does not start again). Any advice on how to go about doing this would be most grateful (Im not asking anyone to do it for me, i just want some advice) Inputs Hot Wash Switch – User selected prior to start Cold Wash Switch – User selected prior to start N.B – Normal Wash will be selected if both or none of the above switches are selected Spin Selection Switch - Machine will spin load after wash and rinse cycle Half Load Selection Switch – Machine will half fill with water Start Switch – Starts cycle Drum Empty Sensor – Indicates water has fully emptied the drum Vibration Sensor – If vibration has occurred during spin cycle only, machine needs to slow forward/reverse until sensor goes off Tub Full Sensor – Machine has reached its full water mark Tub Half Full Sensor – Machine has reached its half water mark Door Sensor – Indicates if the door is open or closed Outputs Slow Forward – Motor is to drive slowly forward Slow Reverse – Motor is to drive slowly in reverse Fast forward Spin – Fast spin @ 1000rpm Door Lock – Locks the door Hot water valve – Allows machine to fill with hot water (supplied at correct temp) Cold water valve – Allows machine to fill with cold water Pump on – Empties water from the machine Wash Timings – • Full Hot Wash – Open hot valve for 64 Seconds • Full Normal Wash – Open hot valve for 48 seconds and cold for 16 seconds • Full Cold Wash – Open cold and hot valve for 32 seconds • Half Hot Wash – Open hot valve for 32 seconds • Half Normal Wash – Open hot valve for 24 seconds and cold for 8 seconds • Half Cold Wash – Open cold and hot valve for 16 seconds Once drum has been filled with water the following cycle can start; • Wash cycle for 3 minutes – alternating between slow forward/reverse • On completion of wash cycle, pump turns on and empties drum • Rinse cycle for 2 minutes - starts filling the drum with water dependent on full/half load and will fill twice, after both fills the drum will be emptied using the pump. • On completion of rinse cycle, drum should be empty • Spin Cycle (If selected) for 2minutes – Spins @ 1000rpm for 2 minutes if vibration sensor activates fast forward cancels and slow forward/reverse activates until sensor goes off, fast forward continues its timer. • Once spin cycles completes, door can unlock nic0

Ok that has explained it ill have a bash at it and see what i come out with :D Thanks

The water mixing works fine although im askin for advice and ways to solve some problems that im having. Not to get slated :) Im currently reading http://www.amazon.co.uk/Programmable-Logic...0024&sr=8-1 To help try and correct my code, before i start using sequences i need to understand how they work etc, Best way to learn is to learn from your mistakes :D

U gotta bare in mind this is my first major project been thrown in the deep end with this. There are bugs in it yes i agree dont think its bad for a first attempt