Envipco FLEX Series - Page 82

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Chapter 4
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The PC Board is the “master” controller board of the machine. It is a Mini-ITX board running the Linux operating
system, and it is located in the RVM Controller Box. It runs these software processes: The Main Control Process,
the Diagnostic Program, the Printer Process, the Display Process, and the Hardware Process.
1. Main Control Process
This process is the “master” process that directs all of the other processes. It also communicates with
the Scanner Multiplexer (MUX) board that controls and coordinates the two (2) barcode scanners in
the feed unit.
2. Display Process
The Display Process communicates with the touch screen display.
3. Printer Process
The Printer Process communicates with the Hecon X56 printer.
4. Hardware Process
The Hardware Process directs all of the other hardware in the RVM, through the use of custom
controller boards. The Hardware Process translates all of the commands of the Main Control Process
into signals that can be read by these subordinate controller boards. These signals are conveyed
through an RS-485 serial connection, using the Multidrop Bus Protocol (MDB). The subordinate
boards are MC1, MC5, and MD5. MC1 controls the hardware that is common to all versions of the
FLEX series: the safety interlock and the compactors. MC5 and MD5 work together to control all of the
hardware that is common to the FLEX machines: the In-Feed, the Sorting Cylinder, and the receipt
button.