You may be in luck. The older Beckhoff system, SCOM5, was more or less a direct clone of Step5. Given that Beckhoff is a German company and Siemens totally dominates the German market, it is probably not unreasonable to assume that they will have retained a certain similarity to Step7.
As far as I'm aware, only SCL is 100% IEC 61131-3 conform, and it's not a part of the basic package.