hello
im studying for HNC electronics at college and PLC is a unit. I like programming and would like to go into automation as a job.
the course doesn't really provide any learning material, its down to me to learn programming. they provided a book that covers some stuff.
I am also using scantime.co.uk training course that is provided online. I am waiting for the test for the first programming module. I have ordered programming modules 1, 2 & 3 and the two ALLEN BRADLEY modules. this is so I can get a certificate that says I have completed some specific course in PLC training. to impress (hopefully) my future employer and help me get a job. though I feel that the course may not be what I am expecting.
I have seen videos on youtube and downloaded a few books. though there arnt any real practice exercises. I have a C programming book that is great for C programming compared to all the other books out there. it gives an explanation of something then some practice exercises that show what should happen. you have to match the end result.
I cant find a book that teaches PLC like that. I can understand things like timers, counters and stuff. its not to difficult to pick that up but putting things together is the tricky bit.
I have a project I have to complete, a training machine
I have to make this perform a task. the task is to move the flight bars (the white things in the tanks) from tank to tank for a period of time in each tank. the process is emulating (or simulating, whichever) a PCB etching process. pick up flight bar, move to tank 1, lower and leave for 5 seconds, lift and drip dry for 10 seconds, move on and so on. I have to have about three flight bars on the go at once. there is a solution that explains everything. but it seems that I have to understand the instructions before hand. so im reading about the instructions and trying to understand the process. I don't want to copy the printed solution as that wont help me.
what I would like is to understand the process of designing a process, breaking it down and programming it. this would require flow charts I imagine though im not good at those. also, laying out a ladder diagram. the solution has about 10 ladder diagrams, not rungs but lad 2, lad 3 so on. im using RS logix 500.
are there any books that go through designing the layout of a program? that says where you can use certain things.
the solution to this problem uses a time diagram(?) not sure if that is the right name for it. it has the seconds for waiting. these seconds are put in the N7 data type on RS logix 500. these waiting times are MOVed around from timer to timer and compared using NEQ. its complex and would require some thought. im not sure of how to break it down. I have read a little about flow charts but cant seem to get it right. I can only use the motor output once so I have to use a lot of internal bits to do a lot of internal stuff. this stuff is what confuses me.
any help would be great
thanks
hope you all had a nice Christmas/timeoff/holiday
simon
im studying for HNC electronics at college and PLC is a unit. I like programming and would like to go into automation as a job.
the course doesn't really provide any learning material, its down to me to learn programming. they provided a book that covers some stuff.
I am also using scantime.co.uk training course that is provided online. I am waiting for the test for the first programming module. I have ordered programming modules 1, 2 & 3 and the two ALLEN BRADLEY modules. this is so I can get a certificate that says I have completed some specific course in PLC training. to impress (hopefully) my future employer and help me get a job. though I feel that the course may not be what I am expecting.
I have seen videos on youtube and downloaded a few books. though there arnt any real practice exercises. I have a C programming book that is great for C programming compared to all the other books out there. it gives an explanation of something then some practice exercises that show what should happen. you have to match the end result.
I cant find a book that teaches PLC like that. I can understand things like timers, counters and stuff. its not to difficult to pick that up but putting things together is the tricky bit.
I have a project I have to complete, a training machine
I have to make this perform a task. the task is to move the flight bars (the white things in the tanks) from tank to tank for a period of time in each tank. the process is emulating (or simulating, whichever) a PCB etching process. pick up flight bar, move to tank 1, lower and leave for 5 seconds, lift and drip dry for 10 seconds, move on and so on. I have to have about three flight bars on the go at once. there is a solution that explains everything. but it seems that I have to understand the instructions before hand. so im reading about the instructions and trying to understand the process. I don't want to copy the printed solution as that wont help me.
what I would like is to understand the process of designing a process, breaking it down and programming it. this would require flow charts I imagine though im not good at those. also, laying out a ladder diagram. the solution has about 10 ladder diagrams, not rungs but lad 2, lad 3 so on. im using RS logix 500.
are there any books that go through designing the layout of a program? that says where you can use certain things.
the solution to this problem uses a time diagram(?) not sure if that is the right name for it. it has the seconds for waiting. these seconds are put in the N7 data type on RS logix 500. these waiting times are MOVed around from timer to timer and compared using NEQ. its complex and would require some thought. im not sure of how to break it down. I have read a little about flow charts but cant seem to get it right. I can only use the motor output once so I have to use a lot of internal bits to do a lot of internal stuff. this stuff is what confuses me.
any help would be great
thanks
hope you all had a nice Christmas/timeoff/holiday
simon
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