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HPB\HPA User Manual
2 GETTING STARTED
2.1 OVERVIEW
The first-time user should approach the HPB in a manner analogous to using a word processor program; i.e.,
many features are available but one may begin by using those of interest at the moment. Section 2.7 of this
manual lists command features by functional groups to assist in this selection. When shipped from the
factory, the default settings provide a pressure transducer that will be usable for many applications. Once the
user is familiar with the performance and command structure, changes may be made and stored using the
‗Store Parameters' (SP) command. Once stored, the new default settings are activated each time the HPB is
powered up. This tailors the personality of the HPB to meet the needs of a particular application.
2.2 EQUIPMENT NEEDED
To prepare the HPB for operation, four items are needed:
• A mating connector with proper wiring connections (see connector part number and wiring diagram in
Section 6—Electrical Connections);
• A DC power supply;
• A source of pressure that is properly matched to the range of the HPB.
• A computer, or host processor, having an RS-232 or RS-485 serial port and terminal program software
such
as HYPERTERMINAL . These
designates which HPB pins must connect to the computer ―send‖, ―receive‖ and ―common‖ pins for proper
communications. Some computers may not have an RS-232 or RS-485 serial port connection identical to the
one shown in Section 6, making it necessary to adapt the HPB connections to that particular computer. A link
to Honeywell demonstration software is available at www.pressuresensing.com.
2.3 TERMINAL PROGRAM SETTINGS
• Enter the following settings in the terminal program:
• Attach a line feed to the carriage return.
• 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. See the BP command description in Section 5.10
of this manual for possible settings.
2.4 INITIAL TURN-ON RESPONSE
Once the wiring connections and terminal program settings are complete, the HPB will automatically send
the following response (or similar to) when power is applied. This reply will be generated any time power is
applied to the HPB.
Typical Reply:
?01HPB_ _ 1200mBAR
?00HPB_ _1200mBAR
The ―?01‖ or ―?00‖ indicates a default address device called a ―null address‖. This HPB has not yet been
assigned an ID number so it assumes the null address.
www.honeywell.com
programs are normally used to interface to a modem. The wiring diagram
Baud Rate ..... 9600
Start Bits ..... 1
Data Bits ..... 8
Stop Bits ..... 1
Parity ..... None
RS-232
RS-485
7
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