Gasboy CFN Series NBS - Manual (Page 30)

Using NBS Understanding Fuel and Card Limits
Page 26 MDE-4390F Gasboy CFN Series NBS (GL3) Credit and Debit Card Network V 1.3.0.0 · November 2008
Disabling Bank Cards at the Island during the Evening (-G)
To disable the use of all NBS accepted cards at the Island, run the command:
NBS -g0 (zero)
To enable the use of all NBS accepted cards at the Island, run the command:
NBS -g1 (one)
A cron command can be set up to run the commands automatically to disable or enable bank
card acceptance at the Island.
Understanding Fuel and Card Limits
The pump limit and the Maximum Authorized Amount Limit are limiting factors for all pre-
authorization modes. The pump limit and Maximum Authorized Amount Limit are the only
two limits that apply to the specialized, self-limiting cards.
Max Limit
Pump limits are specified in the pump table. The pump parameters can be accessed by typing
“pump” from the terminal and selecting “configure pumps”. These parameters must be in
dollars. Max specifies the maximum amount of fuel purchase that can take place with a single
sale. This parameter is to be considered the top limit or the maximum fuel limit allowed. It
should be set high enough to allow convenient fueling for the patrons while being low enough
to limit exposure to fraud or equipment malfunctions. Max will not restrict or limit other type
of purchases. For example, if Max is set to $200 and a pre-auth “fill” purchase took place for
fuel and $300 of merchandise, the allowed purchase amount would be $500. Currently, the
Max limit can be set to zero to indicate no-limits. This may not be a supported feature for the
future and it is highly recommended that a valid Max pump limit value be placed in that field.
Refer to MDE-4316 NT V03.4 Configuration Manual for all pump limits and parameters.
Fill Limit
The pump table is used for setting the fill limits. Fill limit is used to limit the liability for cash
or other types of pay-after-pumping options. This field is usually set to $50 or lower to limit
liability if there is a driveoff. To work correctly, this field must be set to ($) dollars. The
system does not directly read from this table for processing fuel sales. The pump table is used
to load the pump cut-off parameters when the pump table is reconstructed.
Refer to “Cut-off Limit” on page 27 for details of the table used by the system for fuel sales.