ilsk8

Which laptop is most commonly used by PLC Service Engineers? Specs please :)

Hello there :) I hope the attached doc is of any use explaining a bit. As far as firing SCR's, IGBT's, Triacks the most common way of sending gate pulses to the device is PWM. If you type PWM into google you will find a load of realy good information on the subject, or othwize just click the link below :) http://www.solorb.com/elect/solarcirc/pwm1/ http://www.cpemma.co.uk/pwm.html I have built the first circuit and works very well for messing about with. As you will read the PWM circuits adjust the duty cycle of the current/voltage being sypplyed to the end device. For medium frequency converter and resistance welders this is not how it is done, as there is another step to perform by the electronics first. From the PWM circuit a pulse of say 8 to 10 usS is crated and the the frequency of the waveform is modified so that the periodd petween the pulses are shortened or lengthend depending on the frequency required for a inverter for example. For your welder it is probably the phase firing or closed loop control mentioned in the doc. As sugested a current probe attached to a oscilliscope measuring the pulses across the device wile being referanced to the incomming supply of the controling electronics board is a good way of fault finding as that is one of the steps I perform when checking three phase rectifires. Phase_control.doc

Hi there J Have spent the last couple of months working and travelling to and from China and have found it not a problem and am soon to go back next month. If you are travelling alone make sure you have your routes planned out in advance and have instructions to places written in Chinese and English, as the taxi drives do not speak any English. Also a mobile phone with a contact number of someone who can speak English is a great help. At the hotel receptions pick up the hotel card, as it will have a “please take me to my hotel” written on it. Talk to the bell hops and reception as they speak excellent English and are a good source of help and information on what to do and how to get there. Mobile networks Not a problem for American networks as I worked with an American college who had no problem using his phone. I hope you like spicy food. Speaking as a fussy eater, I loved it and tried everything that was put in front of me. Money Cash machines every where. Best advice. Always carry toilet paper with you at all times, you can laugh now reading this but you won’t be laughing later as you will get caught out at some point. Pubs and clubs As there are loads of German car plants in and around shanghai, some clever fella opened an excellent German theme bar, with good food, beer and live music every other night and is well worth a visit. (Cant remember the name, to much beer) Also you got to love the Irish as they have set up camp too and you can live on Guinness alone if you don’t like the food J

Hello all, Been a student for the past 3 years and have now rejoined the full time working life and all the fun stuff that comes with it. I work as an overseas engineer on an hourly rate, so for an average week in the office back in the UK, it’s a 39hr with no week end work needed. If I work away in the UK or overseas, I get a nightly overnight commission. If I work overtime I must work 10hrs before it gets paid at a time and a third, any weekend work gets paid at the usual of time and a half and double time. Also I get a monthly car allowance so I have no excuse but to turn up on time to work. The previous overseas job I had was a salaried 39hr, overnight commission, no car allowance and did not pay any overtime except for Sundays, home or away. Used to work from 8 till 8 depending on the state of the job, but tried to keep it to 8 till 5 when working away, leaving the weekend free for R&R. So I am on a better number now and am just glad to get a decent job so soon after UNI.

Hi there, looks like we both have been doing the same type of project, except mine was for a disabled, aged person point of view. i.e. to simplify the homes controlling systems and offer some remote interaction. You may want to check out some of the links and company names below for some ideas on what you’re in for. Schneider Electrical: - Transparent Building (excellent information) Siemens: - Home automation Kit (very nice, sweet) Creston (very nice, very expensive) Slam these company names and titles into Google and I’m sure you’ll get the right inspiration.

Sorry read the wrong instruction.

using the help file attached to my ladder edditor, it tells me that the CPM range of plc dose have the block transfer function.

Depending on what editor you are using? CX-Programmer or Syswin, they both have DM, Timer, Counter, I/O editors as well as the ladder editor so that the values and settings can be saved for multiple programs. I learnt the hard way by losing DM and Timer values by not saving the DM as well as the Ladder every time I would try a new program to experiment on my own CPM1A. As far as the MOVE function, that’s all it dose is move DM values around the DM area and is still governed by the supper capacitor 20 day or more memory.

1. The sport of choice for the urban poor is BASKETBALL. 2. The sport of choice for maintenance level employees is BOWLING. 3. The sport of choice for front-line workers is FOOTBALL. 4. The sport of choice for supervisors is BASEBALL. 5. The sport of choice for middle management is TENNIS. 6. The sport of choice for corporate officers is GOLF. CONCLUSION: The higher you are in the corporate structure, the smaller your balls become.

From a strictly mathematical viewpoint it goes like this: - What makes 100? - Ever wonder about those people who say they are giving more than 100%? - We have all been to those meetings where someone wants you to give over 100%. - How about achieving 103%? Here's a little mathematical formula that might help you answer these questions: If: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z is represented as: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Then: H-A-R-D-W-O-R-K 8+1+18+4+23+15+18+11 = 98% and K-N-O-W-L-E-D-G-E 11+14+15+23+12+5+4+7+5 = 96% But, A-T-T-I-T-U-D-E 1+20+20+9+20+21+4+5 = 100% And, B-U-L-L-S-H-I-T 2+21+12+12+19+8+9+20 = 103% AND, look how far a$$ kissing will take you: A-S-S--K-I-S-S-I-N-G 1+19+19+11+9+19+19+9+14+7 = 118% So, one can then conclude with mathematical certainty that: While hardwork and knowledge will get you close and Attitude will get you there, Bullshit and a$$ kissing will put you over the top!

Very nice like that a lot.

How about building or using the on board pulse width modulator to control the speed of a small 24v d.c. motor. The code will allow ramp up and down of the motor from interaction with an encoder. You can use a OMRON photoelectric device EE-SY310/-SY410 (under a£5) to be the encoder as it has 24v switching capabilities (if you are in the UK it is available from RS) For a motor check out MFA/Como Drills, because you can by a small gearbox motor for under a £10 with a wide range of operating voltages and gear rarios, either from maplin electronics or RS (UK only I think)

Hum!!!! Just a little clear up hear that’s all. The program supplied at the top of this thread if anyone noticed (still uses SYSWIN that is as every one now has CX-Programmer), is installed with Syswin as series of 3 different examples of ladder logic, and yes very messy. Therefore, written by some OMRON Eng a many years ago me thinks. Ta Ta

Look here http://www.mikroelektronika.co.yu/english/...ook/plcbook.htm

Thanks for the replies. Had sleep and plenty of it.

Communications between CPM1A and NS5 I asked on an earlier post which cable was used to communicate between the above items, and got the answer. However, after reading the PLC and NS manuals and going through the NS5 tutorial that came with NS-Designer, I still cannot get any communications between the two of them. I am using Syswin 3.4 and the only settings available for the peripheral port are in the PLC set up menu, witch only gives me the option of 1. Host link 2. 1 to 1 slave 3. 1 to 1 master 4. NT link (1:1) So I set the port to option 4 (NT link (1:1)) Write a simple line of code LD 000.12 OUT 010.00 And down load this into the PLC. I then switch the C1F01 RS232 adapter over from Host to NT ready to be connected to the NS5. Using NS-Designer I have drawn one pushbutton on a screen and labelled it SERIALA 00000.12(W) Here is the question. In the System settings/initial/system memory/ $SB and $SW, do these settings have to be the PLC memory area (DM 00000 to 01023 for the CPM1A), and how do I establish com’s between the to devices? Thanks in advance P.S. first usefull reply gets a G-mail invite

AHHHHHHHHHHHHHHA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! COMM’S, HAND SHAKE, THINGS TALKING TO ONE ANOTHER. Ok, the first thing to say is this, A man who has never made a mistake has never made F**K ALL!!!!! And always follow the rule of KISS (not the rock band). KEEP IT SIMPLE STUPID!!!!!! Using the cable C200H-CN320-EU witch is the same as WX2Z-200T (2m) apart from one difference cable number 1 dose not get connected to the hood/screen at the RS232 adapter side. In the old CPM1A manual and the serial cable downloads pin 1 is connected to the screen, however, in the new manual pin 1 is not connected. I presume that pin 1 (FG) is a ground and may or may not have any thing to do with my original problem. :-8 Anyhow, I should have paid more attention to what I was observing with the com’s light on the PLC. I said it flashed 5 times, well it was meant to, as the retry count was set to 5 in NS-designer, this meant the plc was not sending any info back to the screen. So, halve asleep and trying to program at 4:30 in the morning while chasing rubbish bins and patio furniture around the garden in high winds is not a good recipe for success, you tend to miss the little HOST/NT switch on the C1F01 is not set to NT (is that the sound of laughter I detect). Also, setting the memory address to PT internal memory/$SB1600 and PT internal memory $SW1600 allowed the NS to talk with the PLC, thus displaying my screens. Once again thanks for the help, I am now going off to die of shame and lack of sleep. P.S. Oh yes, as youve tried to help this muppet (ME) with his problem the Gmail invite go's to Jay, if you whant it PM me the address.

will have to get back to you on this, as its 5AM here and way past my bed time. thanks for the help sk8

Yup, me to , the top one (sorry) tried it on Serial A, then on Serial B just to make shure. I also double check that the settings have been uploaded to the NS5 through the menu, and it has. when the communication between the CPM1A and the NS5 takes place, the two are meant to check that the memory are is set correctly? if this is not correct does the communication fail, and nothing happens? if so, form the setting sheet which DM and bit area are set in the NS5 system set-up?

I have set the peripheral port to the 1:1 NT link via syswin on the PLC, so I guest the NS setting should be the same. still no joy when the NS is reset and poweres back up the comms led on the PLC flickers verry lightly, 5 times, then nothing. the only thing on the NS is 'connecting' at the bottom right of the screen. I have also looked at all the cables available from the downloads page for the hand shake between the devices, there is one cable i havent tryed yet, but I'm in the middle of making it, pic attached.

would love to help, but someone is going to ask these questions what PLC are you using? what programming software? have you made any set up changes to the PLC?

sorry dont know what you mean by cycle the power are you refering to the to potentiometers above the peripheral port?

Hello Mat Follow this link for some tips and downloads. http://www.mikroelektronika.co.yu/english/...ook/plcbook.htm You will see disk 1, 2, 3 in the download section. This is Syswin 3.4 for the CPM range of PLC’s Word of warning!!! (My mistake, do not repeat) Do not change the PLC node address in the PLC set up menu, as this will block the PC from connecting the PLC and render you up the creek without a paddle. The only way of clearing the PLC system memory if that happens is to use a PR001 programming console if you have one that is(very useful) SET NOT RESET EXT MONITOR The above commands should be in the CPM2A manual at the back with a load of other commands that are used with the PR001 and will wipe the PLC memory and set up. Sk8

NICE ONE!!!!!!!!

Hello there everybody, I have a small problem with cables. I am building a collage project and am using a CPM-1A connecting to a NS5 screen via a C1F01 RS232 adapter. I have the cables to connect from PC (Syswin) -> C1F01 RS232 adapter -> PLC and PC (NS designer) -> NS5 screen. Here is the problem! As the 9 pin plugs on the NS5 and RS232 adapter are both male connections, I do not have the right cable to connect the PLC to the Screen via the adapter. Is there a wiring diagram available so I can make the RS232 cable with female ends linking the adapter and the screen? Thanks in advance Rod. :-8