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PLC

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Ethen edited this page Nov 21, 2018 · 4 revisions

PLC Integration

The PLC hardware used for OpenFMS is from Automation Direct instead of the very expensive Allen-Bradley hardware the official FIRST Field uses. We use Automation Direct's BRX PLC and the BRX Ethernet IO modules.

PLC Communications

The PLC communicates to the OpenFMS server via ModBus protocol. OpenFMS has many fail-safes installed for the estops and other safety related features controlled via the PLC. The PLC also communicates with the year-specific hardware and station control cabinets (SCC) via Ethernet IO slaves.

PLC Features

The PLC for OpenFMS is drastically changed every year to keep up with the demanding technology world to offer the best performance for events. The PLC is able to check for the field inputs (E-stops and Scoring Sensors) very quickly to offer the best reliability. The PLC also has the option to have referee interfaces to score auto runs and to add penalties.

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