Worksheet heading description – Gasboy Gilbarco Interface Unit User Manual
Page 18
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10
Installation
Gilbarco Interface Unit v2.1
Gasboy CFN Series
Worksheet Heading Description
Pump number
Enter the number of a fueling position posted on the pump and shown at the Check Point or Profit
Point terminal. You may assign the pump number in a way that makes sense to the customers and
clerks, in terms of the physical layout of the site. Pumps are often numbered so that opposite
sides of the same dispenser have consecutive numbers, but other arrangements are also practical.
Or, using adjacent pump numbers on the opposite sides of the same dispenser may make other
site configuration simpler.
Pump type
The Gilbarco model name, such as Highline, Salesmaker II, Salesmaker IV, MPD, Advantage
Blender, and so on.
Two-wire address
The pump’s two-wire address, from 01 to 16. Always assign two-wire addresses starting from
number 01.
If you assign addresses 13 through 16, remember that you will need to use a non-default
setting for one of the DIP switch bank 4 positions, below.
Sometimes the two-wire address is not the same as the pump number, though like the pump
number there is one two-wire address per fueling position. Dual or double-sided units should
always have consecutive two-wire address pairs, with the odd address smaller than the even
address, for example 01 and 02 (not 02 and 03), or 09 and 10 (not 10 and 11).
If you can, reserve odd-even pairs of two-wire addresses for single-sided dispensers, using
the odd address and skipping the even. For instance, you might give a single-side dispenser two-
wire address 09, and skip address 10, assigning address 11 to the next pump. If this is not
practical you may double up single units, giving one the odd address and the other unit the even
address.
Avoid splitting dual dispensers across two pump control units. This happens if you assign
even-odd pairs such as 10 and 11 to the opposite sides of the same dispenser, or if the two-wire
addresses you assign to a dispenser are not consecutive—for instance 9 and 12.
If you need more than 16 addresses and you are using interface firmware version 2.0 or
above, you need a second interface unit. With two units, put roughly half of the pumps on each
interface unit, remembering not to split any dual dispenser. Start over at two-wire address 01 for
the first side of the first pump on the second unit.
Pump control unit (PCU) number
Pumps are paired onto PCUs to save line bandwidth on the Gasboy RS485/422 local loop. The
two-wire address determines the PCU number, at least in part. Where all pumps at a site are
Gilbarco and there are less than 16 fueling positions, pumps with the two-wire addresses 01 and
02 form PCU #1, two-wire 03 and 04 form PCU #2, and so on through the last pump found on an
interface unit.
If you have a second interface unit, assign the next available PCU number as its starting
PCU number. For instance, if you have PCU numbers 01 through 05 on the first interface unit,
assign PCU 06 as the starting PCU for the second interface unit.
The starting_PCU is the starting PCU number set on DIP switch bank 2, position 8-4.
PCU slot
Each PCU has two slots, numbered 1 and 2. Assign each pump a PCU slot. Assign the pump with
the odd address to slot 1 on its PCU, the even address, slot 2.