Yep, I hear you Jake. If you are spending your company's money, the
$1000+ SLC 5/05 is the way to go! But if you are doing something
worthwhile like assembling a SLC to teach yourself PLCs, or you are a
small business wanting to automate a punch press, the inexpensive but
capable SLC 5/01 is the way to go. Even if you are doing something
silly like controlling Christmas lights at home. :>)
I think the 5/05 is more than that, bit it's a great processor.
I like the bricks like MicroLogix for that kind of stuff... excellent
training tools and also available on E-Bay pretty reasonably. You get the
processor, backplane, power supply and I/O all in one place. The software is
the same for the Micros as the SLC series. The processor is only part of the
For some nutty reason, the Micro's with AC inputs have gotten pretty high on
secondary markets like E-bay. Must be a lot of hobbyists out there.
I think you are correct about the price of micrologix going up. While
Micrologix are well suited for the begginer for training peurposes,
the SLC 500 is better for the actual maintenance department.
With the slc, you can burn the eprom, do more advanced math functions.
With a SLC 5/04 You can take your training as far as you want to go
(and still get a complete system at a resonable price on ebay:>).
Then you can learn about online programing, realtime date and clock
functions, indirect addressing, DH+ etc. (And if you had a unit go out
in your facility, the slc 504 can replace just about any one as a
A great example is the Like New Allen Bradley 1747-L541 SLC 500 5/04
rack, I/O for only $250, a complete system.
Micrologix's have PLENTY of application on the plant floor. When the
job calls for more than a half-dozen-or-so relays (especially when
they're timer relays) I'd much rather install the micro. Way too many
small projects get infected with "feature creep" and then you're
relieved you went with something programmable, rather than having to
go back and rewire!
The MicroLogix line has a bunch a good features... get up into the 1200 and
1500 lines and you've got RTC, a lot of math, and more. And the 1200/1500
are expandable and have a decent range of I/O available.
I think the 5/03 and up will do on-line... but that's it. And DH+ is
probably dead.... I know of dozens of customers that would like to go
straight E_net if Allen Bradley hadn't priced themselves out of the market
on it. They do offer the ControlLogix bridge, which is a way to hold on to
the precious DH+ and allow customers to do some E_net.... along with the
RSLinx Pro server and others. They're all kludged.... and I'm an AB fan.
I agree, and I've even used a PICO for a few simple things. They're
competitively priced, so why not. AB may be moving in the right direction
Now, I love the SLC and PLC-5 family.... real workhorses that will run
forever and drive discretes and low-res analog I/O well. They all have their
places... Controllogix included.