Elizabeth86

Hi PLC people Where can I find the TIMER_M function. I am using GX Works 2. I have been looking in the function block selection window, but I cant find it. Kind regards E

Hi I have built this code to wig-wag on and off at 2 seconds using a timer. I now need to make it flash 5 flashes per/sec by switching input x3. So I have been doing a bit of research and found if I use M8028 I can achieve this, but my code doesn't work. Could someone please take a look and point me in the right direction.

Thank you all for your input. Propeller head you were right turning the toggle switches on then doing the reset works and thank you to nightfly for confirming my code. It all makes sense now Hopefully the rest will be plain sailing Big thanks

Yes Nightfly they are toggle switches and when permanently on both LED's are lit. This is it

Hi Kaare_t re-wire them on the PLC inputs? I haven't changed anything physically. This is what I don't really understand, how that would ever work on GX works 2. I understand how it works as a circuit with electricity. I think nightfly could be right with the start up, and you saying about changing the inputs.

Hi Steve Thanks I have just tried that, made X7 N/C. Y1 is off and when I switch X1 or X2 nothing happens Y1 doesn't come on :(

Hi Kaare_t I didn't run them together, I just put one above the other for the picture. I built the latching circuit with N/O switches, which works great. Then deleted them and built the code with N/C switches. Soon as I go to test it Y1 is on and it doesn't go off when switching X1 or X2.

Thanks Sparky That does make sense, I think i have managed to copy the code below as a URL. The top wo rungs are the latching with normally open switches and the bottom two are latching with normally closed switches. Also I haven't been running them together I am using an fx1s thats set up with 7 switches and 7 output lights, to physically see it working.

Oh sorry, Normally closed switches. (it say make X1 and X2 normally closed switches, when switched the alarm should sound. Reset with switch X7. When I did this the alarm is always on :(

Hi I am new to PLC's and have been given some exercises to do for college, I have done all but one. I did a latching circuit with a SET and RES which was if X1 or X2 is turned on the alarm goes off, X7 resets. Now the question asks do the same but with N/C. When I tried this the alarm is on straight away. Hopefully someone will be able to put an end to my PLC pain I'm using GX Works 2