FRICK
®
QUANTUM™ LX AcuAir
®
CONTROL PANEL
S90-510 CS (MAR 07)
COMMUNICATIONS SETUP
Page 43
Testing Communications
Set the keyboard for CAPS (so that all capital letters will
be used). Type in the following command:
$01T1200001??CR, then press [ENTER]. (This command
will request the value of the Outside Air Temperature of
Unit #1.)
If the communications is working properly, there should be
an immediate response from the first Quantum™. The
response should look something (but not necessarily
exactly) like $A0125434.
If this portion of the test has passed, you can try to
communicate to the next (or any Quantum™), by changing
the value that you type into the HyperTerminal screen as
follows:
Instead of [#01], replace the 01 portion with the ID
that you would like to access. For instance, if you
wanted to talk to a fourth Quantum™ (ID 4), type in
[#04]. This should return a message from that
Quantum™.
This has been just a brief description of how to check your
communications and verify that it is working. Greater detail
can be found by consulting tables for each of the protocols
in this manual.
General Notes
Ensure that the Quantum™ communications parameters
are correct. This setup can be found on the
Communications screen. This info must match that of the
device that you are trying to talk to at the other end.
There are two red LED’s associated with the Com-2 port
on the Quantum™ (TX2 & RX2). Ensure that neither of
these LED’s are on continuously. If one or the other (or
both) are on constantly, disconnect the Com cable. If the
status of the LED’s does not change, check the wiring
connections to the comm port. Ensure that the wiring is
not backwards. If the wiring is correct, power the
Quantum™ down, then back up. If either or both of the
LED’s is still on, a bad driver chip may be suspected on
the Quantum™, and the board should be replaced.
Once everything has been inspected (cables, jumpers,
and setup), try to develop communications from the
leader
. You should see the LED’s on the Com-2 port
flickering as the Quantum™ talks to the
leader
. If nothing
happens, it would be best to consult the HyperTerminal
section of this manual for more detailed troubleshooting.
If no data appears, or if the data does not match the
specific protocol requirements that you are using, then
check the following:
•
Verify that the communications wiring matches
that shown in the drawings at the end of this
manual.
•
Access the Communications screen and verify
that the Quantum™ ID is set to the same value
that you are trying to access. Also, check that the
baud rate matches that of the setup in the
properties section of the Hyperterminal example.
•
Verify the position of the jumpers by comparing
them with the section entitled Quantum™
Communications Jumpers.
•
Ensure that the data that you have entered in
Hyperterminal, exactly matches the example.
•
Go back through the Setting up Hyperterminal
section, and ensure that it has been followed
exactly. Repeat the process if necessary.
•
If you are using a converter card (to convert the
RS-232 signal from the computer to RS-422 or
RS-485), then either verify that the converter card
is working properly with a different piece of
known functioning equipment, or eliminate it
completely by tying into the Quantum™ directly
through RS-232.
•
The Communications port on the computer is
bad. Try to verify this by communicating to a
different piece of known good equipment.
•
The Communications port on the Quantum™ is
bad.