[Need info Beckhoff plc. Who is FS on Ebay]

This software can be downloaded from the Beckhoff Website... http://www.beckhoffautomation.com/tcatweb/...download_e.aspx The registration key is the costly part. The license agreement for Beckhoff software states that the license is non-transferable... http://download.beckhoff.com/download/Docu...re_Products.pdf The development environment is included with TwinCAT PLC, check with your local Beckhoff sales rep. for pricing.

[Conditional jumps in FBD]

There may be an easier way, but SFC is better suited for sequencing types of programs than FBD, do you have the option to choose another one of the IEC languages?

[memory allocation on CoDeSys or TwinCAT]

By default, TwinCAT handles all variable addressing for you, you do not need to worry about one variable "stepping on" another. TwinCAT does allow you to specify a particular memory location, like this... sHMIOperatorID AT %MW0: WORD; Once you have begun to address variables by memory locations, you must excercise caution, as the compiler will give you no warnings. For details about the Struct, see the previous reply

[Beckhoff BX5100 SSB]

I think the CX9001 would be a more elegant solution, but by way of "full disclosure" I do work for Beckhoff.

[Transfer Supplemental Library to CX9000]

You should be able to copy the CAB file off your development PC onto the CX. Here are the detailed instructions in the Beckhoff Information System... http://infosys.beckhoff.com/content/1033/t...avece_intro.htm