Hall Research HR-1P - Manual (Page 4)

4
Hall Research Technologies, Inc.
Operation
The HR-1P is designed to send a string of commands to a
serial device (projector) via the serial interface, when the
discrete input transitions. When the ‘EXT CTRL’ input
transitions from “High-To-Low”, the HR-1P will send the
“OFF” string to the serial device (projector) and when the
‘EXT CTRL’ input transitions from “Low-To-High”, the HR-1P
will send the “ON” string to the serial device (projector).
The HR-1P will communicate with the serial device
(projector) at some baud rate specified in the user’s manual
of the serial device (projector). The HR-1P programming
software will allow the user to select that baud rate for the
serial device (projector). The HR-1P programming software
will also allow the user to upload two strings to the HR-1P.
This will consist of the ON string and the OFF string. These
strings are limited to 100 characters in length each. These
two strings can be constructed directly in the HR-1P
programming software. The user will then be able to upload
the baud rate and the two strings to the HR-1P. The HR-1P
will, in turn, send out these strings to the serial device
(projector) when the ‘EXT CTRL’ input changes state. The
user also has the ability to include a number of waits in the
string of commands. For example the user may send out the
commands ‘CCB’ and then wish to wait for 3 seconds and
then send out additional commands. This will be explained in
further detail below.
How to Create Command Strings
First, select the comm.
port you will use to
connect the HR-1P to
the PC.