
CFN III Quick Reference
Page 48 MDE-4483 CFN III Quick Reference Guide v3.3 · August 2005
Switches
Switch settings should be changed with the power
switch OFF. The new settings are read by the CPU
board when the power is turned ON again.
Switch Bank 1
Position & Definition Setting(*=customary)
1 baud rate
*open=9600
closed=1200
2 communication mode
*open=on-line
closed =standalone
3-4 lead detect delay see below
5 ----
6 authorization activates
*open=no
closed=yes
7 totalizers
*open=no
closed=reset
8 ----
Delay Time 1-3 1-4
0 closed closed
4 closed open
5 open closed
6 open open
Switch Bank 2
This bank serves two purposes:
• address setting when communicating on the
Gasboy RS-485/RS-422 loop, or
• pulser output rate selector when pulser data is
sent to a fuel management system other than a
Gasboy CFN.
Pulse Rate 2-1 2-2 2-3
1 cl cl cl
10 op cl cl
100 cl op cl
250 op op cl
500 cl cl op
1000 op cl op
none cl op op
none op op op
Address 2-1 2-2 2-3 2-4
1 cl cl cl cl
2 op cl cl cl
3 cl op cl cl
4 op op cl cl
5 cl cl op cl
6 op cl op cl
7 cl op op cl
8 op op op cl
9 cl cl cl op
10 op cl cl op
11 cl op cl op
12 op op cl op
13 cl cl op op
14 op cl op op
15 cl op op op
16 op op op op
LCD Board
Jumpers
Display Address:
Hose Jumper Pins
1 across 1 and 2
2 across 2 and 3
Display of Units:
Units K2 K4 K6
whole units 1-2 1-2 1-2
tenths - .0 2-3 1-2 1-2
hundredths - .00 1-2 2-3 1-2
thousandths - .000 1-2 1-2 2-3
For decimal point position only. Display also
depends on pulse rate (latest software) for stand alone
mode. Unused digits are marked.
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