[?]: migration from AB PLC -5 to Siemens

[Vishal]

i want to migrate AB PLC -5 series plc program in to Siemens
can any one tell me the required steps

[sanruku]

Hi Vishal

Although I haven't done that before, it seems to me that the best way to do it is understand what the AB does (reverse engineering), and transfer the code to the S7.

A rough guide how to do it, but take it with a grain of salt:

1) Are there any functions used? If so, try to understand what they do.
2) Identify Digital Inputs and Outputs, how are they activated - deactivated? Analog IO and how are they combined.
3) Identify timers and counters, what is their purpose?
4) If there is someone to let you know what is the function of the AB, try to document everything they say, as the actual functionality of the AB is by far more useful to you than the actual code it carries.

Your purpose in this is not to write the same code, but to do the same thing, to maintain functionality. Keep in mind that the AB should be viewed like a black box, and the only thing of importance should be the real Inputs and Outputs of it.

Ideally, with the same Input (or combination of) you should be getting the same Outputs, and this should be your only concern.

Hope this helps.

[Maeko]

its easy but it will cost the project in migration
Whats the reason for migrating?