S7' s basic storage area in M area can be used for bit logic, integer, double integer and real number types.

MD20 = MW20+MW22 = m 20.0 ~ 7+m 2 1.0 ~ 7+m 22.0 ~ 7+m 23.0 ~ 7

Siemens is a dedicated technology company, relying on innovations in electrification, automation and digitalization to provide solutions for customers in the fields of power generation and transmission, infrastructure, industrial automation, drive and software.