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can anyone that has looked at this help me any? i am not a plc programer i only want to automate a machine i run every day to save me some steps, i think i have explained the steps needed to write the program i am just having problems thank you

oh i forgot about the original estop yes i am using an estop switch but just as my man/auto switch don`t i have to list it in the program?

also the photo eye is being used as when down it see the reflector and can turn on the pump/motor and stays true until it is blocked turning off pump/motor........... this is for a machine i run every day and have talked my boss into letting me automate it for safety and less down time( me holding the button up/down to run the lift.) it has been about 15 years since i have messed with plc's

yes this is for a real machine i am trying to leave the original buttons/etc there and add a man/auto switch when in auto and the machine is pushed on the lift a prox sensor will detect it and drop the safety clams , then when the operator pushes the up button (once) the motor and pump run until the wheel blocks the photo eye turning off pump and motor, once that is done a 2-5 (not sure yet) timer will run then engage safety pins so the lift can not drift down. the reverse is down button in pushed (once) safety pins retract delay timer when timer is done only pump solenoid is engaged and lift comes down. when down another prox sensor will turn off solenoid and disengage clamp and turn and a timer will turn off first prox sensor for 3min while the operator has time to pull the machine off the lift and reset....... so if i don`t use latch commands how to i turn off pump and motor in the up cycle once the photo eye is blocked?

WHERE IN A PROGRAM WOULD YOU PUT AN ESTOP TO JUST TURN OFF OR UNLATCH THE MOTOR CONTACTS SAY FOR EXAMPLE THE PHOTO EYE WENT BAD AND THE MOTOR/PUMP KEPT RUNNING SO YOU HAVE TO HIT THE ESTOP IN ORDER TO STOP THE MOTOR/PUMP .... and sorry about the caps i just saw it was on here is my code i`m trying to write and estop and a man/auto switch is kicking my butt SCISSOR LIFTS.RSS

WHERE IN A PROGRAM WOULD YOU PUT AN ESTOP TO JUST TURN OFF OR UNLATCH THE MOTOR CONTACTS SAY FOR EXAMPLE THE PHOTO EYE WENT BAD AND THE MOTOR/PUMP KEPT RUNNING SO YOU HAVE TO HIT THE ESTOP IN ORDER TO STOP THE MOTOR/PUMP .... and sorry about the caps i just saw it was on here is my code i`m trying to write and estop and a man/auto switch is kicking my butt SCISSOR LIFTS.RSS

with that said this is what i have that is causing me to beat my head against the wall.......to many years not doing this has left me not even close to being rusty but more like a solid mass of oxidized crap SCISSOR LIFTS.RSS

in auto mode i want to just be able to push the buttons up or the down and walk away and let the program do the rest

also the buttons are a push and release as it is now with no automation you hold the button down and it turns on the motor/pump solenoid and stop all when released

I am changing the code now( the last worked fine in the emulator) the company i work for has no automation this will be the first, so they want to see a"demo" before they will buy a plc for me to play with i am trying to add a plc to a scissor lift first step is when we push equipment on to the lift, i was thinking of using a prox switch to sense it is there and turn on the safety clamps, then add a photo eye to the motor/pump latch and unlatch commands. ( not sure how they work any more been 15 years since i worked with them n/o or n/c i want the pe to be lit in down poss and once the up button is pushed the motor/pump run until the wheel crosses the light beam and then unlatch the motor/pump once that is done a 2 sec timer will run and then use the dn bit of timer to energize a saftey pop out cylinder to keep the lift from drifting down .........the of course start the down command from a second switch witch will olnly unlatch safety pins,turn on pump solenoid( motor does not run in down) and once down turn off clamps and prox sensor for 3 min so you have time to pull equip off to me it should be a simple project, but my head is hurting from beating it against the wall. i don`'t get anything from this at all other than a pat on the back and more work since this is a lift i run crazy yes it means faster work for me but it would really make my job easier.

it seems to be working only 1 issue i see and that is rung zero and rung 14 the clamp at 0:0/0 pulses but if i untoggle the start bit my timers do not run everything else seems to work as planned SCISSOR LIFT A.RSS

OK i`m not sure what to do now i have tried latch and unlatch commands different timers but my output to my motor contact and solenoid are always energized i want them to turn on for 30 sec the go off until i start the down cycle.

ok ty, i think i have it figured out now, can someone tell if this program will work before i go spend the money on a plc, and also how to i reset everything back at the end of cycle or will it auto rest once cycle is comple when i start the next cycle. SCISSOR LIFTS.rss

OK i thought i had them off, why when i disable all forces does the box under it still say forces enabled?. and should this program work? as you see i am working on a scissor lift. after i push the start button the safety clamps should engage, then a 5 sec pause after that the motor will run for 30 sec and raise the lift. after lift is raised a pop out cylinder will come on and secure the lift from drifting down. i think i have it but i just realized that i need to add a solenoid to energize at the same time to open the pump while the motor is running. and now besides why it sdays forces enabled, i see i have another problem......back to the drawing board.

i am having trouble seeing if this code is right i never see the motor contact or safety pin outputs come on , they turn green but always say off. can someone shed some light on this please and ty in advance scissor lifts.RSS