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MARCH 2019 I PCB007 MAGAZINE 47 systems are responsible only for transporting the wafers from one station to another. PC-10 instructs the material handling system to take a lot or a group of lots to a piece of equip - ment. Examples of material handling systems include robots or tracks used to move the wa- fers through the fabrication area. The chal- lenge we face when we address a new class of equipment to develop our models is to per- form an adequate survey of equipment on the market and develop an accurate yet general model of how these pieces of equipment op- erate." Figures 7 and 8 are simple schematics of the CIM hierarchy in wafer fabrication using PC-10 as the equipment controller. Custom Software Custom software for smart factories can be challenging, but with proper planning, the task can be executed quickly. Custom software planning phases and deliverables might in- clude (Figure 9): • Investigation: Investigation report and data sheet(s) • Design: External/internal specifications and design outline • Construction: Code, test, and document • System testing: Ensure code meets requirements • Release: Transfer to manufacturing and quality review • Support: Enhancement and updates Figure 8: Process recipe on PC-10 to be downloaded by SECS II and GEM [7] . (1) "SECS data tables and control" panel to be imported and displayed at machine application. It controls and monitors the communication state with the host. (2) "Message to host" panel where SECS binary data is formulated. This binary data is then sent to the host. (4) "History data log" panel logs the "send and receive data" between host and equipment in both low and high levels. (3) "Message from host" panel where data is received in SECS binary format and converted to text and other formats.