Garmin gps/35 Global Positioning System (gps) option purpose




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Garmin GPS/35

Global Positioning System (GPS) OPTION
PURPOSE
This document will explain the two boards that can be used in the 555A/B/C Data Acquisition System to communicate to a Global Positioning System (GPS) option. The boards used are:

1. Multi Comm board – Has four (4) jumper selectable ports, which are capable of four (4) RS232 ports



  1. Single RS232 board - Provides one (1) RS232 port

The document will also provide instructions and programming to maintain full charge of the GPS internal battery.


SCOPE
This document provides the wiring configuration and programming requirements when using the Multi Comm or the Single Serial RS232 board to communicate with the GPS. The information will cover the GPS.555A, 555B, 555C and 555C-1 data acquisition systems in the following order:
GPS information

  • Internal Battery


Wiring Configuration

  • Multi – Comm Board

  • Single Serial Board


Sample Program

  • GPS used with GOES Transmitter


GPS INTERNAL BATTERY
The GPS has been tested, the baud rate set to 2400 baud and the internal battery has been fully charged when shipped from the factory. A fully charged battery will last for 6 months. If the GPS has not been deployed within the first month, the battery will require a full charge prior to deployment. The internal battery will require 48 hours to fully charge. The following is the procedure to charge the internal battery of the GPS:

  1. Connect a 12 volts dc battery to the (+) and (-) leads of the GPS:

  1. GPS with wires

  • Red wire to battery (+)

  • Black wire to battery (-)

  1. GPS with connector

  • Pin C to battery (+)

  • Pin D to battery (-)

After 48 hours of battery charge, perform the following using a computer to ensure the GPS is functioning and to reset the ram in the GPS. Use PRO-COMM plus perform this function. The wiring of the GPS to the computer is:


  1. GPS to DB9 connector


GPS DB9
White wire or pin 2

Pin B of connector


Blue wire or pin 3

Pin A or connector


Black wire or Pin D pin 5
Red wire or Pin C Power supply - +12 volts

Black wire or Pin D Power supply - Ground




  1. Terminal program set up

  1. Set Baud rate for 2400,N,8,1

  2. Press ALT m for meta keys and set as follows:


TYPE CONTENTS COMMENTS
ALT –1 Text $PGRMO,,2^M^J Disables all Outputs

ALT-2 Text $PGRMO,GPGGA,1^M^J Enables all Outputs

ALT-3 Text $PGRMO,GPGGA,0^M^J Disable Specified line

ALT-4 Text $PGRMC,,,,,,,,,,2^M^J Changes baud rate to 2400





10 commas

ALT-5 Text $PGRMI,,,,,,,C^M^J Clears Ram



7 commas




  1. Press S to save the meta key entries and press Esc to return to main screen.

  2. Main Screen:

  • Press ALT-1

  • Press ALT-2

  1. Readable data should be displaying on screen continuously, if data is good, go to next step (e). If data is garbled go to step (f).

  1. Press ALT-4

  • Note that the data value will display 0’s when ALT-4 is pressed

  • GPS programming is complete

  1. Press ALT –3 , to change baud rate to 2400

  • After pressing ALT-3 cycle power on the GPS

  • Press ALT-1

  • Press ALT-2

a. Readable data should be displaying on screen continuously

  • Press ALT-4

  1. Note that the data value will display 0’s when ALT-4 is pressed

  2. GPS programming is complete


MULTI COMM BOARD
555B External Wiring
It is recommended that the connector modification to support the GPS be performed at the factory. The Multi Comm board default settings set comm port 0,1, and 2 for RS232 and Com port 3 for 485/422. A 6-pin connector, as shown in the figure, is required to connect the GPS to the 555B. Wire the connector as follows:
Signal External Connector Scrambler Board

Tx Pin A J8 – 1

Rx Pin B J8 – 2

Switch 1-(+12Vdc) Pin C W1 – 34

Ground Pin D,E System Ground

Tx-Rx Transmit

Connector





555A External Wiring
In this procedure the Multi Comm board is being wired to support the RS232 Port 2. External wiring from the GPS is as follows:
GPS Wire 555 Terminal Input
White TB Pin – Rx2

Blue TB Pin – Tx2

Red TB Pin – SW1

Black TB Pin – Ground



555C External Wiring
In this procedure the Multi Comm board is being wired to support the RS232 Port 2. External wiring from the GPS is as follows:
GPS Wire 555 Digital I/O Connector
White Pin – 32 - Rx2

Blue Pin – 37 - Tx2


GPS Wire 555 STD #1 Connector
Red Pin – 25 - SW1

Black Pin – 23 - Ground



SINGLE SERIAL INTERFACE BOARD
The Single Serial Interface board provides one RS-232 device and will be connected inside the 555 data acquisition system. The single serial interface board can be used in any of the 555 systems.
555B Installation
The single serial interface board is provided with two (2) ribbon cables. The single serial interface board connectors are labeled on trace side of the board, ‘External’ and ‘CPU’. Install the single serial interface board, as shown in the next figure:

  1. External side – J1 of connected to the scrambler board.

  2. CPU side – connect to J1 of the CPU data acquisition board.



Brown Wire



External Wiring
A 6-pin connector, as shown in the figure, is required to connect the GPS to the 555B. The external connector is wiring to two 80-pin connectors. The wiring is as follows:
Signal External Connector Scrambler Board
Tx Pin A J8 – 1

Rx Pin B J8 – 2

SW1(+12Vdc) Pin C W1 – 34

Ground Pin D,E




Tx-Rx Transmit

Connector




55A/C/C-1 Installation
The single serial interface board is provided with two (2) 80-pin ribbon cables. The single serial interface board is labeled on each end of the board, ‘External’ on one side and ‘CPU’ on the other. The ribbon cable between J1 of the CPU and the external connector board will be replaced by the serial interface board assembly.
Install the single interface board, with the brown wire of the ribbon cables on the right side, in the following manner, shown in the next figure:

  1. Disconnect the ribbon cable that is connected to J1 of the CPU and the terminal strip back plain, of the 555A, or from the circuit board, of the 555C.

  2. Connect the ‘External side’ to J1 of the terminal stripe (555A) or to the circuit board of the Digital I/O connector (555C).

3. Connect the ‘CPU side’ to J1 of the CPU data acquisition board

Brown Wire



555A External Wiring
Wiring:

Wire Terminal
White Rx2

Blue Tx2


Red SW1

Black Ground


555C External Wiring
Wiring; wires have male pins:
Wire Digital I/O Connector
White Pin – 32 – Rx2

Blue Pin – 37 – Tx2


Wire STD#1 Connector
Red Pin – 25 – SW1

Black Pin – 23 – Gnd


555C-1 External Wiring
Contact Vaisala to have the 555C-1 modified to accommodate the GPS. The modification will require a external connector and a wiring modification to provide the TX and RX to the external connector. The wiring to the external connector is as follows:

Signal External Connector
Tx Pin A

Rx Pin B

SW1(+12Vdc) Pin C

Ground Pin D,E




Tx-Rx Transmit

Connector






PROGRAMMING
555A/C/B With GOES Transmitter
The following is a sample program, using a GOES transmitter in the 555. This sample program will test the GPS, which also contains the programming to maintain the GPS internal battery at full charge.
Program
The following programming screens are in the order required to successfully complete the programming.
Sensor Assignments
Battery Volts

  1. Select ‘Add’

  2. Select ‘ Misc. Single Ended Analog’

  3. Select ‘Battery Volts’ and program as shown:





Dummy Sensor Assignment

The assignment will be used to turn on the Switch (SW1) to apply +12 volts to the GPS for 20 minutes.



  1. S
    Set to 2 if using SW2
    elect ‘Add’

  2. Select ‘Misc. Single Ended Analog’

  3. Select ‘ Single Ended Voltage’ and program as shown


Any available input



Not


Applicable



Process Definitions
GOES Transmitter

  1. Select ‘Add’

  2. Select ‘Handar GOES Transmitter Support’

  3. Select ‘GOES self-timed Data Xmit’ and program as shown:

  4. Select ‘Field Accessible’ Yes

  5. Select ‘ Add a New Entry’

  6. Input the as shown







RS232 Support

  1. Select ‘Add’

  2. Select ‘Rx2/Tx2 Serial Port Support’

  3. Select ‘RS232 Serial Interface’ and program as shown:

Note: Answer ‘Y’ for ‘Using 555-6020’ for both Multi-Comm and Single Serial Interface board applications

Interval Post to turn on Dummy
This process will turn on the Switch (SW1) at 12 o’clock noon every day to charge the GPS battery.

  1. Select ‘Intermediate Data Processing’

  2. Select ‘ Interval Posted Data’ and program as shown:


Log GPS


  1. Select ‘Add’

  2. Select ‘Interval Data Logging’

  3. Select ‘ Log Multiple Source Data’ and program as shown:

  4. Select ‘GPS’ for all 7 Data Source Ids selecting 1 –7 for each of the GPS fields.













Sensor Assignments
GPS

  1. Select ‘Add’

  2. Select ‘System Function’

  3. Select ‘GPS Receiver Interface’

  4. Input as shown:

  1. Sensor ID: GPS

  2. Input Location: Press ‘Enter’-software will select next available location

  3. Fields: 7 – number of fields in GPS

  4. Port selection: Select 2 for single serial interface, select port to be used for Multi-Comm

  5. Sw.12v source: select 1 or 2, do not have other sensors on GPS sw.12v line

  6. Scan start time: 00:00:00

  7. Scan interval: 00-00:30:00

  8. GPS pwr advance: 00:04:00

  9. Xmtr timebase: Y

  10. Select ‘Yes’ for ‘Field Accessible’ for ‘GPS acquisitions’

  11. S
    Select
    elect ‘Add a new Entry’

  1. PARAMETER NAME = Gps_Accs

  2. VALUE = 0











  1. Select ‘Yes’ for ‘Field Accessible’ for Clock error

  2. Select ‘Clock_Adj and Press ‘Enter








555A/C/B With out GOES Transmitter
The following is a sample program, not using a GOES transmitter, in the 555. This sample program will test the GPS and also contain the programming to maintain the GPS internal battery at full charge.
Program
The following programming screens are in the order required to successfully complete the program.
Sensor Assignments
Battery Volts

  1. Select ‘Add’

  2. Select ‘ Misc. Single Ended Analog’

  3. Select ‘Battery Volts’ and program as shown:




Dummy Sensor Assignment
The assignment will be used to turn on the Switch (SW1) to apply +12 volts to the GPS for 20 minutes.

  1. Select ‘Add’

  2. Select ‘Misc. Single Ended Analog’

  3. Select ‘ Single Ended Voltage’ and program as shown


Any available input





Not



Applicable



Process Definitions
RS232 Support

  1. Select ‘Add’

  2. Select ‘Rx2/Tx2 Serial Port Support’ from Category List

  3. Select ‘RS232 Serial Interface’ and program as shown:

Note: Answer ‘Y’ for ‘Using 555-6020’ for both Multi-Comm and Single Serial Interface board applications


Interval Post to turn on Dummy
This process will turn on the Switch (SW1) at 12 o’clock noon every day to charge the GPS battery.

  1. Select ‘Intermediate Data Processing’

  2. Select ‘ Interval Posted Data’ and program as shown:



Set Clock Error


  1. Select ‘Add’

  2. Select ‘ System / General Processes’

  3. Select ‘ Time Clock Field Adjustment’









Log GPS

  1. Select ‘Add’

  2. Select ‘Interval Data Logging’

  3. Select ‘ Log Multiple Source Data’ and program as shown:

  4. Select ‘GPS’ for all 7 Data Source Ids selecting 1 –7 for each of the GPS fields.














Sensor Assignments
GPS

  1. Select ‘Add’

  2. Select ‘System Function’

  3. Select ‘GPS Receiver Interface’

  4. Input as shown:

  1. Sensor ID: GPS

  2. Input Location: Press ‘Enter’-software will select next available location

  3. Fields: 7 – number of fields in GPS

  4. Port selection: Select 2 for single serial interface, select port to be used for Multi-Comm

  5. Sw, 12v source: select 1 or 2, do not have other sensors on GPS sw.12v line

  6. Scan start time: 00:00:00

  7. Scan interval: 00-00:30:00

  8. GPS pwr advance: 00:04:00

  9. Xmtr timebase: N

  10. Select ‘Yes’ for ‘Field Accessible’ for ‘GPS acquisitions’

  11. Select ‘Add a new Entry’

  1. PARAMETER NAME = Gps_Accs

  2. VALUE = 0



Select







  1. Select ‘Yes’ for ‘Field Accessible’ for Clock error

  2. Select ‘Clock_Adj and Press ‘Enter







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