Hiprom Technologies 1769HP-GPS Manuale utente
1769HP-GPS
USER MANUAL
Rev 1.1 – June 2005
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Table of Contents
Chapter 1
Introduction.......................................................................................................3
Chapter 2
Module Accessories .........................................................................................4
Chapter 3
Module Operation.............................................................................................5
Chapter 4
Installing the Module ........................................................................................7
Chapter 5
Configuring the Module ....................................................................................8
Chapter 6
I/O Address Map ............................................................................................15
Chapter 7
Module Status ................................................................................................22
Appendix A
PLC Ladder Example .....................................................................................23
Appendix B
Specifications .................................................................................................44
Appendix C
GPS Operation...............................................................................................45
Appendix D
Time standards ..............................................................................................49
Appendix E
Glossary .........................................................................................................50
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CHAPTER 1
INTRODUCTION
The 1769HP-GPS module provides accurate time and position information and services
for the Allen-Bradley 1769 platform (CompactLogix or MicroLogix 1500).
The module makes use of Global Positioning System (GPS) technology to derive accurate
time which is synchronized with the atomic clocks located on the GPS satellites.
This document serves to describe the functionality, installation, configuration and use of
the module.
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CHAPTER 2
MODULE ACCESSORIES
Each 1769HP-GPS package includes the following components:
•1769HP-GPS module
•5m RG58 patch lead with a SMA male and TNC male connector on either end
•3.3V active 50Ωbullet antenna
•1769HP-GPS user manual
GPS
Global
Positioning
& Timing
Module
MODULE
ANT
GPS
GPS
Figure 2.1 : 1769HP-GPS module with antenna and patch-lead
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CHAPTER 3
MODULE OPERATION
The 1769HP-GPS module is designed to operate within the Allen-Bradley 1769 backplane.
All power required for the module’s operation is derived from the 1769 backplane.
GPS
Global
Positioning
& Timing
Module
MODULE
ANT
GPS
GPS
Figure 3.1 : 1769HP-GPS Layout
The on-board GPS receiver is connected via the external SMA antenna port and external
antenna patch-lead to the active GPS antenna. Once the module is powered-up it will
begin searching for available GPS satellites. Soon after lock on at least 4 satellites has
been achieved the module’s internal time will become valid.
Status LEDs
SMA Antenna Port
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The current status of the module is conveyed to the user by means of the 2 bi-color Status
LED’s.
The following information is available to the user directly across the backplane by means
of a scheduled connection:
•Date and Time in Gregorian Format (year, month, day, hour, minute etc.)
•GPS Receiver Status
•Number of satellites being tracking
•Position in Polar Coordinates (latitude, longitude and altitude)
•Position in Cartesian Coordinates ( Earth-centered-earth-fixed X,Y,Z axis)
•Velocity in Polar Coordinates (Northerly, Easterly and Upward)
•Velocity in Cartesian Coordinates ( Earth-centered-earth-fixed X,Y,Z axis)
All time and date information can be adjusted to the local time-zone by configuring the
Time-Zone offset, in the scheduled output image.
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CHAPTER 4
INSTALLING THE MODULE
GPS utilizes a spread spectrum signal in the 1.5GHz range, and thus cannot penetrate
conductive or opaque surfaces. Thus the antenna should be mounted in a horizontal
position with an unobstructed view of the sky.
Attach the antenna patch lead to the antenna. It is recommended that waterproofing tape
be used to seal the connection.
NOTE: Should a longer patch lead be required it is recommended that a GPS signal
booster is used. Contact your local Hiprom Technologies distributor for assistance.
Attach the patch lead SMA (male) to the module’s SMA (female) connector. It is not
recommended that the antenna patch lead exceed a total loss of 10dB at 1.5GHz, as this
may increase the time to GPS lock, or in extreme cases, prevent GPS lock from being
achieved at all.
Once the module has been power up for the first time, it will search for satellites from a
cold start (i.e no almanac). The module will take approximately 5 minutes to acquire Lock.
Once a complete almanac has been downloaded, the time to achieve fix will be reduced to
around 45 seconds.
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CHAPTER 5
CONFIGURING THE MODULE
The 1769HP-GPS module is supported by Allen Bradley’s MicroLogix 1500 and
CompactLogix PLC systems. Because the CompactLogix uses RSLogix 5000 and the
MicroLogix 1500 uses RSLogix 500, two different setup procedures are explained below.
5.1 CompactLogix (RSLogix 5000)
A direct connection between the controller and the 1769HP-GPS module is required to
transfer I/O data to and from the module. In addition the module supports various
unconnected messages that can be used to retrieve particular information.
Establishing the Direct Connection
This section describes the procedures necessary to configure the 1769HP-GPS module
within the CompactLogix system.
The 1769 Generic Module is used in RSLogix5000 to configure the module. The
configuration of the module is detailed in the table below.
Data Format
CommFormat Data – INT
Connection parameters
Description Instance Size
Input 101 19
Output 100 4
Configuration 102 0
Table 5.1 : 1769HP-GPS connection parameters.
RPI
Request Packet Interval 1 ms
Table 5.2 : Local CompactBus connection parameters.
The steps required to add a new 1769HP-GPS module are detailed below.
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Figure 5.1 : Right-click on I/O Configuration and select New Module
Figure 5.2 : Select Generic 1769 Module ( 1769HP-GPS MODULE )
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Figure 5.3 : Configure module’s parameters
Figure 5.4 : Right-click on CompactBus Local and select Properties
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