HM-RS232-ISO User Manual
MAN-1032 18/10/2013 v1
Designed and Produced under
Page 3 of 5
ISO 9001:2008 Certification
The
“HM Test” is
included on the installation CD to provide a quick and easy way to test that you can
communicate with your HART device. There are two versions of HM Test, Windows and Windows CE.
The Windows version can be downloaded from
http://www.hart-expert.co.uk/wp-
content/uploads/HART_Modem_Test_Windows.zip
expert.co.uk/wp-content/uploads/HART_Modem_Test_Windows_CE.zip
Launch the program HM Test from the CD or from the installed icon.
Click the “Set COM Port” button
and select the COM port number that you noted in Step 1.
Then select “Poll HART Network” to connect
to a HART device. The program sends HART Command 0 to determine what transmitters are connected
to the loop. The “Status” bo
x will indicate successful (or otherwise) communication to the HART device.
If the test failed click the button “COM Troubleshooter” for help, or c
onsult the following
“Troubleshooting” section of
this manual.
Step 5) Set the COM port in your HART configuration software
Open your HART configuration software and with reference to the supplier’s literature, set the
communication port to the COM port number noted in step 1.
You are now ready to configure your HART devices. You are also invited to try our HART Communicator
software free for 10 days, please see
http://www.hart-expert.co.uk/online-shop/hart-communicator-
software-free-10-day-trial-windows-pcs
Troubleshooting
Verify the following:
1. COM port number in your HART configuration software is set to the Serial Port (or COM Port number)
the HART Modem is connected to (step 5)
2. Loop power supply is on (Step 3)
3. Loop resistance is between 250 ohms and 1Kohms
4. Loop current is within HART limits
5. If multi drop configuration, all transmitters in the loop have unique addresses
6. The HART Modems HART connection is across the loop resistor or across the transmitter terminals
(see diagrams in step2)
7. The HART Modems RS232 connector is seated firmly in the
PC’s RS232 con
nector
