Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New __link__ Jun 2026
Today, two distinct classes of controllers handle Two-Wire protocol management. The first is the dedicated forecourt controller, like the DOMS PSS 5000, which functions as a universal translator. It supports over 100 different protocols, including multiple versions of Gilbarco 2W (Australia, EU, USA, and Changi). Its ability to handle mixed-brand equipment makes it a cornerstone of multi-vendor forecourts.
High-speed optocouplers are strictly required on third-party controllers to prevent ground loops and protect against high-voltage surges in the forecourt environment. Data Link and Encoding Parameters
For newer installations, Gilbarco has introduced high-speed communication technologies like the Invenco Link
For implementing or troubleshooting a third-party pump controller using the , you will need to reference specific technical manuals that detail the hardware electrical specifications and the logical command set. 1. Primary Protocol Documentation Today, two distinct classes of controllers handle Two-Wire
The (often referred to as "Type A" or "Current Loop") is a legacy serial communication standard used to control fuel dispensers. For third-party pump controllers (non-Gilbarco POS), this protocol allows basic fuel authorization, grade selection, and transaction monitoring without requiring a full Gilbarco G-SITE or Passport controller.
While the physical layer uses current loops, the data layer utilizes standard asynchronous serial parameters. Third-party controllers must configure their UART peripherals to the following strict specifications:
Once a transaction terminates, the controller issues a data readout command to harvest the exact sale details. The dispenser responds with structured ASCII strings indicating: Total money dispensed. Total volume dispensed. Unit price per gallon/liter applied during the sale. The tier/grade index utilized. D. The Clear/Acknowledge Command Its ability to handle mixed-brand equipment makes it
: A USB-powered, optically isolated converter that provides a physical bridge between the dispenser and a POS. Note that this is not a protocol converter; the POS software must still implement the actual Gilbarco logic. PTS-U3 Controller : A specialized board modification from Technotrade
Despite being a proprietary protocol, it has become a "standard" in the industry, with most major third-party controllers (DOMS, POSTEC, Tokheim) supporting it.
A multi-drop loop supporting up to 16 fueling positions on a single pair of wires. Communication Model and IFSF support
: Used by Highline-2, Euroline, Euro Dimension, Doms DP-9000, and Australian models. Data Format : 8 Data bits, Even Parity, and 1 Stop bit. Physical Layer
Common returns include Idle, Hook-Up (Nozzle Lifted), Fueling, or Collect (Fueling Complete). 2. Authorization Sequence
The message structure for the Gilbarco dispenser two-wire protocol consists of the following elements:
The Gilbarco Two-Wire Protocol remains a cornerstone of fueling technology. Its proven reliability, combined with modern advancements like the PCN5, cloud management, and IFSF support, ensures it will continue to be a critical standard for third-party pump controller developers well into the future. By understanding its technical foundations and the latest innovations, developers can create powerful, flexible, and future-proof solutions for the global fueling industry.
High-speed optocouplers protect the controller from ground loops and lightning surges.