The Versamax uses the Hitachi risc processor and is very similar in capability to the S7-200, there are a lot more modules available for the GE (different types of Analogue IO usw) they both have a PROFIBUS slave and Ethernet
(although I haven't seen a webserver or ASI for the GE) The Siemens has not got a DEVICENET interface. The Programming software - I only know of the v1.0 VERSAPRO software, (I sincerely hope it's been upgraded since) and it was very poor. no library support, or IEC1131. It is extremely tedious to program simple maths (mathematics) routines. Siemens MicroWin is a dream in comparison. As ever it's horses for courses, both these PLCs are manufactured by world class companies, and have good technical backup. Personally I would only use the GE if the customer refused anything else. (oh yes, the GE costs lots more)
The Versa Pro for GE is a very flakey peice of software, and often crashes resulting in the corruption of your program.
But i would go the S7200 if you need to perform complicated routines (its really just a re-badged Texas instruments). Its more cost effective, and communicates well with cheap front end scada like protool RT. And a base model will come with onboard I/O built in, it may be enough so you wouldnt need extra I/O modules
In continuation to my previous query, the software development of the PLC + Operator interface (HMI - Quick panel) is completed for GE. But when i powered on the panel after 1 month found there is no software in HMI and PLC as well.
pls let me know if u have any such experience with GE.
Regarding the PLC, does it have battery backup? And how much time will it last. The normal battery mounted inside the Power Supply Module will last 5 weeks as per claims, would be lower at higher temperatures and age of battery. This is for a 36x/37x CPU. Without a battery you have about 10 minutes.
So check up the battery and CPU specs. This could be solved by writing to FLASH memory if present on the CPU.
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