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SIMATIC is a series of programmable logic controller and automation systems, developed by Siemens.Introduced in 1958, the series has gone through four major generations, the latest being the SIMATIC S7 generation.
Zen supports stand-alone, client-server, peer-to-peer [7] and software-as-a-service (SaaS) [8] architecture. The central architecture of Zen consists of two database engines: (1) the storage engine, known as MicroKernel Database Engine (MKDE) and described as a transactional database engine, and (2) the relational database engine, known as SQL Relational Database Engine (SRDE).