FP-5L
RS-232 (5-volt) Option
1014031
10/14/03
1. General Description
1. General Description
1. General Description
1. General Description
1. General Description
The RS-232 (5-volt) option transmits serial RS-232 (5-volt) data on the white/green wire (pin 15) of the FP-
5L. The serial data transmitted is the same as that shown on the digital display when displaying Fuel Flow (in
gal/hr), Fuel Remaining (in gal/hr) and the AUX channel. The transmited format is compatable with the
MUX-8A and if the transmitted signal is inverted, it may be connected directly to a P.C. The serial data is
transmitted in a comma delimited format, suitable for importing into most spreadsheet and data base programs.
The transmited format for this RS-232 Option is not compatable with GPS units. The received format was not
changed and is compatable with GPS units.
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
Although the RS-232 (5-volt) option does not affect the operation of the FP-5L, the operation of the FP-5L can
affect the transmission rate. If the FP-5L is placed in any programming mode the transmition of data will stop
until the FP-5L is returned to normal operation. Also, the "GPS Receive Format" and the "Display Update
Time" will affect the Baud Rate or Transmit Rate (see Power-up Programming). The "GPS Transmit Format"
setting has no effect on the RS-232 (5-volt) output.
3.
3.
3.
3.
3. T
T
T
T
Transmit Specification:
ransmit Specification:
ransmit Specification:
ransmit Specification:
ransmit Specification:
* Baud Rate:
9600 baud when "GPS Receive Format" is set to "In1" (see Power-up Programming).
(9600 is the only baud rate that will interface with the MUX-8A)
1200 baud when "GPS Receive Format" is set to "In2" (see Power-up Programming).
4800 baud when "GPS Receive Format" is set to "In3" (see Power-up Programming).
* Data Bits:
8
* Start Bit:
1 (Logic Low)
* Stop Bit:
1 (Logic High 5-volts)
* Parity:
None
* Transmit Rate: 1.5 sec. for "Display Update Time" set to "UP1" (see Power-up Programming).
0.5 sec. for "Display Update Time" set to "UP2" (see Power-up Programming).
4.
4.
4.
4.
4. T
T
T
T
Transmit F
ransmit F
ransmit F
ransmit F
ransmit Format
ormat
ormat
ormat
ormat
The FP-5L transmits the following record:
FP,FFF.F,RRR.R,AAAACrLf
FP
Instrument identifier.
,
A comma separates data fields.
FFF.F
Fuel Flow in gal/hr.
RRR.R Fuel Remaining in gal/hr.
AAAA AUX Channel Data
Cr
Carriage return (0Dh)
Lf
Line feed (0Ah)
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
The white/green wire originally used to upload data to a GPS is now used to output data to the MUX-8A or to a
PC via the MUX-8A. Set the "GPS Receive Format to "In3" (9600 baud) on the FP-5L to interface with the
MUX-8A.
