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Table of Contents
Related Manuals for Honeywell HPB
Summary of Contents for Honeywell HPB
- Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
- Page 2 HPB\HPA User Manual Honeywell Precision Barometer HPB and HPA User’s Manual RS-232 and RS-485 Output www.honeywell.com...
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Page 3: Table Of Contents
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... - Page 4 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...
- Page 5 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...
- Page 6 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. Section 3 Commands: Quick Reference—A brief description of each command with typical HPB...
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Page 7: Introduction
RS-485 RS-232 type HPB, up to 89 units can be connected in a ring configuration to a single serial port of a computer. The type HPB allows up to 89 HPBs to be connected to a two-wire multidrop bus, when bus repeaters are used to satisfy the RS-485 bus electrical requirements. -
Page 8: Getting Started
• Turn the local echo ON. When shipped from the factory, the HPB is set to a baud rate of 9600, 1 start bit, 8 data bits with no parity and one stop bit. If the baud rate has been subsequently changed, and is unknown, it will be necessary to search all baud rate values to reestablish communication. -
Page 9: Command Format
Note: The ―?‖ indicates a response from a null address HPB – one which has not been assigned a device ID. A null address, 00, is coded into each HPB at the factory. When an RS-232 null address HPB responds, it adds one to its address, hence, the response ‗01‘. Refer to the ID command in Appendix A for a description of addresses and responses. - Page 10 HPB\HPA User Manual • SET DEVICE ID To give the HPB an assigned address of 01 up to 89, enter the following commands: <cr> This enables the HPB to change a parameter in RAM Type: *00WE <cr> This sets the null addressed HPB to device ID=01.
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Page 11: Command Functional Groups
EEPROM. 2.7 COMMAND FUNCTIONAL GROUPS • PRESSURE DISPLAY UNITS —HPB reads out psi, in wc, mm Hg, etc. Set pressure units for output readings—any one of 13 common units (See Section 8) Specify a user supplied unit of measure •... -
Page 12: Commands-Quick Reference
All readings, except P3 and P4, are ASCII format readings. Set operating mode...all readings or only changed readings • START-UP PARAMETERS—Sets the HPB configuration after power is applied Enable parameter writes to the RAM or EEPROM Store RAM parameters to the EEPROM for startup Specify the power-up message and operating mode •... - Page 13 *12..instead of *00... (2) The responses shown here begin with ?01.. and are for a null address HPB. That is, an HPB that has not yet established unit identification (see ID command). If the HPB has an assigned address of 23, for instance, the response will begin with #23.. instead of ?01...
- Page 14 HPB\HPA User Manual Note: See Section 5.10 for complete command descriptions. www.honeywell.com...
- Page 15 HPB/HPA User Manual Note: See Section 5.10 for complete command descriptions. www.honeywell.com...
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Page 16: Functional Operation
The HPB has an accuracy of 0.03% of full scale (FS) over a -40 to +85°C temperature range. This accuracy is achieved by compensation algorithms in the microprocessor. Because of the internal digital circuitry, having a digital output capability is straight forward. -
Page 17: Pressure Reading Control
HPB/HPA User Manual 4.3 PRESSURE READING CONTROL The HPB commands allow considerable flexibility in tailoring pressure acquisition times, sample windows, thresholds, and output rates. These are controlled by 7 commands: Deadband and Sensitivity (DS), Integration (I=), Speed shift (S2), Speed shift at 50msec intervals (S5), Idle Count (IC), Reading Rate (RR), and OPerating mode (OP). -
Page 18: Figure 4.2-Pressure Reading Control
HPB Pressure Rate Conditioning Deadband and Sensitivity User Compensation Integration Time Idle Count I = Rn or I = Mn IC = c DS = dd Sn (DS=00S0 factory default) =M002 factory default) (IC=0 factory default) Integration Dead Band if c = 0 then no wait cycles if c = 1 - 255 then add 'c' wait DB = n x dd x 0.005% FS range... -
Page 19: Customized Pressure Range
The F= command is used in conjunction with the X= and Z= command to customize the full scale range and user compensation of the HPB. The F= command allows the user to reduce the full scale range of the HPB as much as one-half the factory FS value. -
Page 20: Command Illustrations
(S2, S5) allow the tracking of rapid changes while sampling less often when pressures are slowly changing. A threshold is set independently for the S2 and S5 commands that tell the HPB when to begin outputting samples at the higher rate. The S2 command causes the output rate to double. The S5 command causes the readings to be output at 50 msec intervals synchronous with the normal reading rates. -
Page 21: Figure 4.7-S2 Speed Shift Command Example
If the idle count were set to IC=4, then after a pressure output reading, the HPB would not output the next 4 readings and the fifth one would become the next output reading. -
Page 22: Figure 4.9A-Deadband And Sensitivity (Ds) Command Examples
HPB\HPA User Manual 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 www.honeywell.com... -
Page 23: Pressure Reading Decimal Position
Digital pressure readings are displayed with a sign and a decimal position. Table 4.1 shows the number of decimal place variations among the HPB pressure ranges; the number of digits to the right of the decimal place. This is important when converting a binary format number so that decimal position can be determined. -
Page 24: Figure 4.12-Hpb Rs-232 Ring Network
ID. All HPB units with the same group address will respond to a command sent to this level address. The last is a global address, which is read by all HPB‘s on the network. The device ID can be assigned by direct command or assigned automatically based on its position from the host processor in HPB network. - Page 25 Each HPB on a communication ring must have a unique address in order to individually receive commands from the host processor. For example, if more than one HPB on a ring has a null address, and a 00 address command is transmitted by the host, only the first null address HPB will receive the command and the command is not passed on.
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Page 26: Figure 4.13-Hpb Rs-485 Multidrop Network
HPBs on a network is 89. An HPB multidrop network connection of six units is shown in Figure 4.13. In this network, the device IDs are not in order from one end of the network to the other. Looking at all the units on the bus, the device IDs are sequential beginning with ID=01 and without duplication.