Serial Port
Menu > Setup > Communication > Serial Port

  • Configured: Enabled
  • Label: Example: EDIM or POS
  • Usage: EDIM

Note: When the usage is changed from RS-232 to EDIM, additional options will appear.

  • Protocol: See following page.
  • Baud Rate, Data Bits, Parity, Stop Bits, Use Handshaking: These settings will automatically be setup when the protocol is selected. Change settings as needed.
  • Units Reported: Default is set to US
  • Serial Command Security: Disabled
  • RS-232 End of Message: Disabled

Installation Hardware

Note: There may be other configurations possible. The following examples are recommended by Veeder-Root. See the POS installation manuals for additional examples and information.

Controller / POS DIM Protocol Installation Hardware
Passport / EDH Gilbarco EDIM Gilbarco M11247B064 connector
Veeder-Root 331063-XXX cable
Commander VR Protocol DIM Verifone 13652-01 connector
Verifone 13836-XXX cable
Allied / NexGEN VR Protocol DIM Allied N9445-ADP connector
Veeder-Root 331134-XXX cable
NCR / Radiant VR Protocol DIM Verifone 13652-01 connector
Verifone 13836-XXX cable


EDIM Settings

Controller / POS Protocol Baud Rate Parity Length Bits
Passport / EDH Gilbarco EDIM 1200 Even 1
Commander, Allied / NexGEN, NCR / Radiant* VR Protocol DIM 9600 Odd 7 1

* Default units for this EDIM is Metric / Liters.





The console will display an E1 Comm Alarm, if there is no communication between the EDIM and POS. This can be caused by a bad or disconnected cable/connector, incorrect programming, a bad EDIM or a POS issue.

  • Confirm the correct EDIM port is being used. Port 1 is closest to the front, port 2 is closest to the back (wall).
  • Confirm the cables and connectors between the console and POS are firmly connected. A loose or disconnected cable will cause communication issues.
  • Check for correct part numbers on all cables and connectors.
  • Confirm the EDIM is programmed correctly on the console.
  • Confirm POS is configured for BIR and correct communication board settings.
  • Verify there is communication in the EDIM diagnostics:
    Menu > Diagnostics > Module > Comm
    • Monitor bytes and confirm both the bytes received (Rx) and transmitted (Tx) are similar in numbers as shown below.
    • Monitor bytes received and transmitted, confirm the numbers increase over several minutes.
    • Confirm there are no errors.
Diagnostics Module Communications



Testing the EDIM Port


Note: A straight through connection will not work.

Cable Examples:


Testing Steps:

  1. Using the null modem RS-232 cable, connect a laptop to the EDIM port in question.
  2. On the console, change the port usage from EDIM to RS-232.

    Note: Changing the port usage may also change the Baud Rate, Data Bits, Parity and Stop Bits back to default settings.

    Note: When the port is programmed as an EDIM, it will not communicate with a laptop. The port must be set to RS-232 for laptop communication.
  3. Open PuTTY
  4. Basic Options for your PuTTY session
    A. Connection type: Serial
    B. Serial line: Type in the laptop’s comm port. For example: COM4
    C. Speed: 9600

  5. On the left side of the screen, under
    Category select Connection > Serial
    A new screen will appear.
  6. Serial line to connect to: Confirm laptop’s comm port
  7. Configure the serial line: Confirm settings in PuTTY match the console
  8. Flow Control: None
  9. Press Open
  10. A blank screen will appear.
  11. For the inventory report, type: <CTRL-A>200

Inventory Report Appears

If the Inventory Report appears, as shown below, then this confirms the EDIM/RS-232 port is working fine.
If the E1 comm alarm remains active, then this indicates an issue external to the console.


No Inventory Report

If there is no response to the serial command, then this can indicate a bad RS-232 port.


Inventory report - COM4 PuTTY


Further Information