Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New

Maximum dollar value or volume allowed for the transaction (crucial for prepay or fleet limits). C. The Data Readout Command (Collection)

The Gilbarco dispenser two-wire protocol is designed to work with a wide range of third-party pump controllers, including:

The two-wire protocol uses a master-slave communication architecture, where the dispenser acts as the master and the pump controller acts as the slave. The dispenser sends commands to the pump controller, which responds with status updates and data. The protocol uses a simple, ASCII-based command structure, making it easy to implement and integrate with existing systems. Maximum dollar value or volume allowed for the

Controls all communications. It sequentially queries each fueling position (node) on the loop.

: Fetching the final Price Per Unit (PPU), dispensed volume, and total money at the end of a transaction. Implementation for Third Parties The dispenser sends commands to the pump controller,

: Uses a small number of characters to maintain high-speed communication between the controller and the pump. Hardware & Wiring Requirements

Older Gilbarco Advantage and Encore 300 dispensers used heavy encryption on the two-wire bus. However, with the sunsetting of legacy hardware and the rise of the and FlexPay 6 series, Gilbarco introduced a "Legacy Compatibility Mode." New dispensers can now output a simplified, unencrypted subset of the two-wire protocol specifically to accommodate third-party automated fueling systems (ATFs) and car wash controllers. It sequentially queries each fueling position (node) on

For PC-based control, the Levtech Communication Interface provides a USB-to-Two-Wire converter and includes testing software for Windows.

Despite being 30+ years old, the two-wire protocol remains relevant because: