Lighthouse PLCs, Inc. : Automation Forum
THE PURPOSE OF THIS FORUM IS: AUTOMATION SOLUTIONS. IF YOU ARE A PERSON INVOLVED IN SOME ASPECT OF AUTOMATION, HAVE AN APPLICATION YOU JUST CAN'T QUITE GET A HANDLE ON 
- HAVE A PRODUCT QUESTION - OR MAYBE HAVE AN ISSUE WITH SOMETHING (EVEN IF IT IS WITH US 
), IT IS POSSIBLE YOU WILL FIND THE ANSWER HERE!!
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YOU ARE PROBABLY RIGHT ON THE MARK, AND MIGHT BE ABLE TO HELP SOMEBODY OUT!! 
AND, IT COULD BE YOU THAT NEEDS HELP NEXT TIME. AFTER ALL...(REALLY?).. ARE WE NOT ALL "CHILDREN" - AT VARIOUS POINTS ON THE LEARNING CURVE OF TECHNOLOGY" ??? (I know I've still got a lot to learn and I've been at it for... well since 1970!)
Hopefully the information presented here will help provide solutions to some of today's automation challenges. Some issues are probably old, some are probably new. Many are products of the economy, the resultant reduction in manpower, exacerbated by aging equipment crippled by decreases in maintenance budgets. The ULTIMATE goal here is that we all become more successful in our careers and chosen professions.
MAYBE THIS FORUM CAN HELP!!!
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Dear Manuel Gaspar,
The P250 Series has been obsolete for some time. According to the PLC timeline, manufacturing stopped nearly 20 years ago.
Hitachi also stopped repairing these units over 10 years ago, because the internal components were no longer available.
You have about three options. You may be able to find the unit you are looking for at one of the on-line trading sites like eBay. You may be able to find a used one at PLCCenter. There is a chance you might be able to get the unit repaired locally at a reputable electronics repair company.
Lastly, if you have the program documented, you can upgrade to the manufactures recommended replacement, which is either the "Large-H" (high I/O count), or EH-150 series, which is newer and will eventually replace the Large-H.
You would have to take your documentation (like ladder-logic or function block) and by using a laptop with Hitachi programming software, enter the program into the new unit.
If you do not have the program documented, you will need to get it from the Original Equipment Manufacturer (if they cooperate) or use a programming console. The console attaches to the front of the P250 and displays the program in "steps". If you (carefully) write down each step, you will then have the documentation needed for an upgrade.
I trust this information helps you make an informed decision.
Good Luck with your project!
Timothy 
Profession/Tech Level Master Electrician X3
