Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New Repack 🎁

The Gilbarco Two-Wire protocol is a standard communication interface used to connect Gilbarco fuel dispensers (such as the Encore 500 and SK700) to Point-of-Sale (POS) systems and third-party controllers. It utilizes a 2-wire current loop to facilitate real-time data exchange for transactions, inventory management, and diagnostics. Technical Specifications For third-party integration, the protocol requires specific communication parameters and physical wiring: Physical Layer : Uses a 2-wire current loop interface. For new installations, Unshielded Twisted Pair (UTP) data wires are required (minimum 18 AWG for runs up to 1000 feet). Baud Rates : 5787 bit/sec : The standard "Corporate" baud rate for newer models like Highline-111 and Euroline. 4800 bit/sec : Used for older or specific models like Highline-2 and Euro Dimension. Data Format : 8 Data bits, Even Parity, 1 Stop bit. Addressing : Up to 16 fueling positions can typically be connected per dispenser communication channel. Third-Party Controller Integration Because the protocol is proprietary, third-party controllers often require an intermediary hardware interface to communicate with the dispensers: Gilbarco Two Wire Pump Protocol - TOAZ - INFO | PDF - Scribd

Here are the key features of the Gilbarco Two-Wire Protocol (often referred to as G-Site or TLS-2 over serial) when used with third-party pump controllers for new installations: 1. Single Twisted-Pair Communication

2-wire half-duplex RS-485 based signaling (A & B) carrying both data and power (for low-draw devices). Reduces cabling costs compared to multi-wire or proprietary loops.

2. Addressable Per-Hose (Not Just Per-Pump) The Gilbarco Two-Wire protocol is a standard communication

Each fueling point (hose) has a unique logical address. Enables per-product, per-hose authorization and sales data retrieval.

3. Pump-Initiated Polling (Slave Mode for Controller)

Dispensers broadcast status changes (handle up, handle down, sale in progress, quantity delivered). Controller listens as a passive master—no need for continuous controller-driven polling. For new installations, Unshielded Twisted Pair (UTP) data

4. Standardized Message Set (Gilbarco "G-Site" Format)

Supports:

Authorize hose (product, preset limit) Sale start/stop Real-time volume & price readback Pump reset / clear sale Status of nozzle, door, meter, emergency stop Data Format : 8 Data bits, Even Parity, 1 Stop bit

5. Error Detection

CRC-16 on each message frame. Timeout and retry logic defined for noisy environments.