Rembrant
Member
- Join Date
- Jun 2003
- Posts
- 18
Hello folks,
Well, the first day of my PLC training has come and gone, and I absolutely loved it....of course it was with Allen Bradley trainers, but the training was generic enough, I should be OK with the others.
After the introduction, and some theory on I/O, each of us were given a simple diagram to make a program for: one n/c stop switch, one n/o start switch, and an output to make a light come on. Pretty simple stuff.
Of course, my mind still tries very hard to work in relay logic, as thats what its used to, so for my n/c stop switch, I originally entered an XIC symbol, since it was a n/c switch...would not work! So then, after it was explained to me, I switched it to a XIO, and it worked perfect. So, I still don't really understand why I wanted an "examine if open" symbol for a n/c switch.
Can somebody explain this in simple words for me....is it because I want the processor to get a "false" reading when the n/c stop switch opens? I don't want to learn by repetition, I want to understand it.
And last of all, I'm learning ob AB PLCs, but we don't use AB at work, and never have. We had Siemens, and now almost all Schnieders.....are they going to be easy to get on to if I'm comfortable with the AB equipment?
Thanks for any thoughts guys.
Rembrant
Well, the first day of my PLC training has come and gone, and I absolutely loved it....of course it was with Allen Bradley trainers, but the training was generic enough, I should be OK with the others.
After the introduction, and some theory on I/O, each of us were given a simple diagram to make a program for: one n/c stop switch, one n/o start switch, and an output to make a light come on. Pretty simple stuff.
Of course, my mind still tries very hard to work in relay logic, as thats what its used to, so for my n/c stop switch, I originally entered an XIC symbol, since it was a n/c switch...would not work! So then, after it was explained to me, I switched it to a XIO, and it worked perfect. So, I still don't really understand why I wanted an "examine if open" symbol for a n/c switch.
Can somebody explain this in simple words for me....is it because I want the processor to get a "false" reading when the n/c stop switch opens? I don't want to learn by repetition, I want to understand it.
And last of all, I'm learning ob AB PLCs, but we don't use AB at work, and never have. We had Siemens, and now almost all Schnieders.....are they going to be easy to get on to if I'm comfortable with the AB equipment?
Thanks for any thoughts guys.
Rembrant