Procom HART HM-BT-BAT User Manual

ProComSol, Ltd HM-BT-BAT User Manual

HM-BT-BAT User Manual

Introduction

The HM-BT-BAT HART Modem, Bluetooth is designed to connect PC’s to HART
networks via wireless Bluetooth technology. Once the HART side is connected, the
user’s application software can then configure, monitor, and document HART based
instrumentation from up to 100ft (30m) away.

System Diagram

The complete system consists of Host PC with Bluetooth transmitter, HM-BT-BAT, and
HART network. The Host PC can be a Pocket PC PDA. For PC’s without an integral
Bluetooth transmitter, there are many add-on transmitter modules available, such as the
Linksys USBBT100, USB Bluetooth Adapter.

Figure 1. Bluetooth System Diagram

Bluetooth Range

Note that Class 1 Bluetooth transmitters, such as the USBBT100 have a range of 100’.
Class 2 transmitters, such as the HP IPAQ PDA, have a range of 25’. The HM-BT-BAT
works with both Class 1 and Class 2 transmitters, but operation is limited to the range of
the master transmitter.

Software Drivers

No additional software drivers need to be installed.

Battery

The HM-BT-BAT requires a standard 9V battery for operation. Remove the 4 enclosure
screws to access the battery. A fresh battery will provide 14 hours of continuous service.

Power Switch and LED

Slide the power switch toward the LED to turn on the unit. The LED will illuminate
when the unit is on. Slide the power switch away from the LED to turn the unit off. Turn
the unit off when not in use to conserve battery life.

NOTE: Make the HART connections before turning on the power to the modem. This
will improve initial communication reliability.

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ProComSol, Ltd HM-BT-BAT User Manual

Initial PC Setup/ Bluetooth Modem Discovery

The following procedure must be done at least once for the PC to “Discover” the HM­BT-BAT.

1. Turn on the HM-BT-BAT. It does not need to be connected to the HART
network.

2. Run the Bluetooth driver software that came with your PC or Bluetooth adapter
(ie Linksys). There is typically a Bluetooth icon on the system tray that can be
double clicked.

3. Select “Find Bluetooth Devices” or “Site Survey” to locate any Bluetooth devices
in the area. You could also search for services. Search for “Serial Services” to
also locate Bluetooth devices.

4. A device labeled “HART Modem” should be discovered.

5. Double click on the “HART Modem” icon. The available serial service will
appear as “ZV-SPP”, and say it is not connected.

6. Double click on “ZV-SPP”. The Bluetooth connection will be made and the
assigned COM port will be reported. This is typically COM8. Note this port
number for your application software.

7. Some Bluetooth drivers may prompt for a “Passcode”. Enter “1234”, without the
quotes.

Discovery needs to be repeated only when adding or changing HM-BT-BAT modems, or
when multiple modems are in the Bluetooth area.

PC Applications

Start your PC application and set the com port setting to use the com port reported during
Discovery. Use the application as normal. The HM-BT-BAT looks like a normal RS232
device to the application software. The application software does not need to be
modified.

Multiple HM-BT-BAT Modems

When several modems are in the same area, the Discovery process needs to be repeated.
The modems will appear as “HART Modem (1)”, “HART Modem (2)”, etc. It may
require trial and error to determine which modem is connected to the desired HART
network.

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