Protocol For Third Party Pump Controllers New !full! — Gilbarco Dispenser Twowire

5787 bps (standard for legacy systems) or 9600 bps (standard for modern configurations). Data Bits: 8 bits. Parity: Even parity. Stop Bits: 1 stop bit. Flow Control: None (handled entirely via software polling). Protocol Architecture and Polling Cycle

In a Two-Wire setup, the Third-Party Pump Controller acts as the "Master" and the Dispenser Interface Board acts as the "Slave." The protocol manages three critical phases of the fueling transaction: 5787 bps (standard for legacy systems) or 9600

A newly designed third-party controller acts as the orchestrator of the site. It must maintain a robust internal state machine mirroring the physical movements of the customer at the forecourt dispenser. Stop Bits: 1 stop bit

Maximum dollar value or volume allowed for the transaction (crucial for prepay or fleet limits). C. The Data Readout Command (Collection) It must maintain a robust internal state machine

Historically, a third-party controller had to mimic Gilbarco’s "polling" (asking each dispenser 10x per second). The new converters handle this polling internally. Your controller simply sends a :

Dispensers act as passive current switches, modulating the loop current to transmit data back to the controller. Data Link Layer and Framing

Note: <SOH> = Start of Header (ASCII 0x01). Grade = 1-8.