Comparision of CPU's of Siemens & Allen Bradley

Dear All,
Can anyone advice me with the equivalent CPU for S7-412 DP in Allen Bradley. Is it L43 or L63?
Regards,
Neeraj

Quite sure this thread will generate many replies...

Well, it is not so easy to compare so directly these systems just looking at the CPU; a quick reply would be to use ControlLogix (L6x or L7x controllers).
There are anyway many factors to consider: number of I/O points, memory, speed(cycle time), networks needs, type of I/O modules, remote I/O modules, HMIs, etc.
A more complete analysis would be possible posting more infos about your application.

In the meantime, I would like to suggest the following guide that could give some hints for your conversion:

http://literature.rockwellautomation.com/idc/groups/literature/documents/ap/logix-ap008_-en-p.pdf

Hope this helps,

- fuzzy logic

With "L43" you probably mean the compactlogix CPu with integrated motion functions. This is more comparable with an S7-300 "T" CPU.

An S7-400 is more comparable with a ControlLogix CPU, like the "L63" you mention. Both S7-400 and ControlLogix have functionality on the higher level that f.eks. CompactLogix or S7-300 do not have.
CPU-redundancy, network redundancy, RIUP, higher backplane performance for attaching many communication modules, and more..

Thanks for quick answers. The IO's I am looking at this stage is DI-108, DO-80, AI-78 & AO-68. The programming includes maximum PID's as this is for a continuous process Plants. Further to this I want open ended system so that I can add IO's at a later stage without having a need to change processor. ( approx 2-3 times of present configuration).
Cheers,
Neeraj

Can your process accept a short downtime in case there is PLC problem ?
If not, you may have to consider CPU and/or network redundancy.

JesperMP said:

Can your process accept a short downtime in case there is PLC problem ?
If not, you may have to consider CPU and/or network redundancy.

Click to expand...

Dear Jesper,
Its acceptable.
Cheers
Neeraj

The number of PID loops (68 ?) indicates that it is not so small a project. I think forget about CompactLogix.

I would get a ControlLogix CPU (L7x), an Ethernet module (ENBT), and
either use 1756 racks and IO if RIUP is required
or use POINT IO if RIUP is not required.