HPB\HPA User Manual
Honeywell Precision Barometer
HPB and HPA User’s Manual
RS-232 and RS-485 Output
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HPB/HPA User Manual
Table of Contents
0 USER’S MANUAL CONTENT
1 INTRODUCTION
1.1 PRODUCT OVERVIEW
1.2 HARDWARE DESCRIPTION
2 GETTING STARTED
2.1 OVERVIEW
2.2 EQUIPMENT NEEDED
2.3 TERMINAL PROGRAM SETTINGS
2.4 INITIAL TURN-ON RESPONSE
2.5 COMMAND FORMAT
2.6 STEP-BY-STEP EXAMPLES (Only for single HPB connection)
2.7 COMMAND FUNCTIONAL GROUPS
3 COMMANDS—QUICK REFERENCE
4 FUNCTIONAL OPERATION
4.1 OVERVIEW
4.2 WHAT IS INTEGRATION?
4.3 PRESSURE READING CONTROL
4.4 CUSTOMIZED PRESSURE RANGE
4.5 COMMAND ILLUSTRATIONS
4.6 PRESSURE READING DECIMAL POSITION
4.7 HPB ADDRESSING
5 COMMANDS
5.1 COMMAND FORMAT
5.2 INFORMATION REQUEST COMMANDS
5.3 ACTION DIRECTING COMMANDS
5.4 COMMAND REPLIES – GENERAL
5.5 ASCII FORMAT REPLIES
5.6 BINARY FORMAT REPLIES
5.7 COMMAND AND REPLY SEQUENCING
5.8 COMMAND ERRORS
5.9 COMMAND SUMMARY TABLE
5.10 COMMAND DESCRIPTIONS
6 ELECTRICAL CONNECTIONS
7 TIMING DIAGRAMS
8 SPECIFICATIONS
9 DIMENSIONS
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HPB\HPA User Manual
Figures
Figure 4.1—HPB Block Diagram
Figure 4.2—Pressure Reading Control
Figure 4.3—Custom Slope (X=) Options
Figure 4.4—Custom Offset (Z=) Options
Figure 4.5—Integration (I=) Command, Example 1
Figure 4.6—Integration (I=) Command, Example 2
Figure 4.7—S2 Speed Shift Command Example
Figure 4.8—S5 Speed Shift Command Example
Figure 4.9a—Deadband and Sensitivity (DS) Command Examples
Figure 4.9b—Deadband and Sensitivity (DS) Command Examples
Figure 4.10—Idle Count (IC) Command Example
Figure 4.11—Synchronize Integration Cycles (SI) Command Example
Figure 4.12—HPB RS-232 Ring Network
Figure 4.13—HPB RS-485 Multidrop Network
Figure 5.1—Single HPB Command and Reply
Figure 5.2—Multiple HPB Network Command and Replies
Figure 6.1—HPB RS-232/485 Electrical Connector Pin Assignments
Figure 6.2—Connection for RS-232 Operation
Figure 6.3—Connection for RS-485 Operation
Figure 7.1—Default Single Pressure Reading Timing Diagram
Figure 7.2—Default Continuous Pressure Reading Timing Diagram
Figure 7.3—Continuous Pressure (with IC = 1) Timing Diagram
Figure 7.4—Timing Diagram for 20 Readings Per Second
Figure 7.5—Timing Diagram for 50 Readings Per Second
Figure 7.6—Timing Diagram for 120 Readings Per Second
Figure 9.1—HPB Case Outline Standard
Figure 9.2—Electrical Connector
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HPB/HPA User Manual
Tables
Table 1.1—Various Digital Modes
Table 4.1—Decimal Place Locations for Pressure Readings
Table 5.1—Header Description for Binary Format Pressure Readings
Table 5.2—Binary Format Character Codes
Table 5.3—Command List
Table 5.4—Factory Default Command Responses
Table 5.5—Display Units Options
Table 7.1—Transmission Times at Selected Baud Rate
Table 7.2—Number of Bytes in Various Replies
Table 9.1—ASCII Conversion Table, Decimal to Hexadecimal
Table 9.2—RS-232 Standard Pin Connections
Table 9.3—Electrical Signal Levels
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HPB\HPA User Manual
0 USER’S MANUAL CONTENT
This user‘s manual is divided into the following sections.
Section 1
Introduction—Product
overview and hardware description.
Section 2
Getting Started—Lists
equipment and procedures necessary to operate the HPB and
provides a few simple command examples, which will get first-time users acquainted
with the command structure.
Commands: Quick Reference—A
brief description of each command with typical HPB
input and response examples.
Section 3
Section 4
Functional Operation
Section 5
Commands—Contains
a detailed description of the command structure, functional
groupings and all user commands.
Electrical Connections—Contains
wiring diagrams for various HPB electrical
connections.
Section 6
Section 7
Timing Diagrams—Illustrates
RS-232 serial port timing for command and reply
interaction.
Section 8
Specifications—Contains
electrical and environmental specifications.
Section 9
Dimensions—Contains
a case outline of the HPB
It is suggested that the first-time user read the ―Getting Started‖ section to be sure the necessary items are on hand.
Be sure to connect a source of pressure that matches the transducer range.
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