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COMMUNICATION
For remote interaction with your controller, enter the setup mode, confirm the
"Communication" menu, and select the "Connection type" from among 4 avail-
able options:
• PC
• HI 504900 GSM module
• HI 504901 GSM supervisor
• HI 504902 Modem
pC C
oMMuniCation
Choose the "PC" connection type to communicate
with the controller from your PC, through an RS485
network and the HI 92500 Windows
compatible
®
software.
RS485 standard is a digital transmission method that allows long lines connec-
tions. Its current-loop system makes this standard suitable for data transmission
in noisy environments.
The user-friendly HI 92500 offers a variety of features such as logging selected
variables or plotting the recorded data. It also has an on-line help feature to
support you throughout all operations.
The readings logged into the HI 720 internal memory can be downloaded through
HI 92500, which makes it possible for you to use the powerful means of the most
diffused spreadsheet programs. Simply run your favorite spreadsheet program,
open the file downloaded through HI 92500, and you will be able to elaborate
the data with your software (e.g. graphics, statistical analysis).
To allow our users access to the latest version of Hanna Instruments PC
compatible software, we made the products available for download at
http://software.hannainst.com. Select the product code and click Download
Now. After download is complete, use the setup.exe file to install the software.
Specifications
The RS485 standard is implemented in the HI 720 series with the following
characteristics:
• Data rate: up to 19200 bps (manually selected)
• Communication: Bidirectional Half-Duplex
• Line length: up to 1.2 km typ. with 24 AWG cable
• Loads: up to 32 typ.
• Internal termination: none
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