QUANTUM
™
LX EVAPORATOR CONTROL PANEL
COMMUNICATIONS SETUP
090.610-CS (MAY 2016)
Page 18
6. Wire to the rst panel via RS-232 (Q4 only), RS-
422, or RS-485 to the Quantum™ LX Comm Port.
• If you are communicating to more than
one panel, then you will not be able to
use RS-232. You can however, convert
RS-232 to either RS-422 or RS-485 with
an adapter card. Reference the Convert-
ing an RS-232 Serial Port to RS-422 or
RS-485 section for information about an
adapter card.
• Refer to the drawing of the Quantum™
LX Main Board in this manual to iden-
tify wiring and jumper locations for the
Comm Ports.
• Refer to the Main Board Communica-
tions section in this manual for the cor-
rect jumpering of RS-232 (Q4), RS-422,
or RS-485.
7. Send a single command to read data from this
Quantum™ LX using its ID.
8. Check if you received a data response at your de-
vice.
9. Troubleshooting when you don’t receive a data re-
sponse:
• Check to see if the status of the Comm
Port on the Communications screen is
showing ACTIVE or OFF.
• ACTIVE is shown only when the Quan-
tum™ LX understands it is receiving a
properly composed message.
• Check that the RX I/O communication
activity lamp on the Quantum™ LX Main
Processor Board is blinking as it receives
the instruction from your device.
• A steady lit RX LED or one that isn’t
lighting, are signs of improper wiring.
• If the RX LED is properly blinking, then
check if the TX LED is blinking in re-
sponse.
• If the TX is not blinking then check the
communication protocol setup at the
panel, the panel’s ID and the Comm Port
baud rate setting.
• If the TX is blinking, then check that the
Comm Port communication jumpers are
correct.
NOTE: A useful tool for troubleshooting is Windows
HyperTerminal. Refer to the HyperTerminal Setup
section in this manual for more information.
If you properly receive data and need to communicate
to more than one panel, then setup and wire to an-
other panel. Reference the wiring diagram drawings
in the back of this manual. Send a single command
to read data from this Quantum™ LX using its ID and
troubleshoot as above, if necessary. To prevent noise
feedback which is possible when communicating over
a long distance, only the last panel should have the
termination jumpers installed.
SERIAL PROTOCOL
DESCRIPTION
The use of serial communication protocols per-
mits data transmission between devices. Protocol
determines how contact is established and how
the query (question) and response (answer) takes
place. The information in a message command re-
quires:
• The identity of the intended receiver (ID
#)
• What the receiver is to do (read or write
to a setpoint, etc.)
• Data needed to perform an action (the
value of a setpoint to be changed)
• A means of checking for errors (check-
sum).
When using any of the communications ports,
check what communication protocol has been se-
lected from the Communications screen. The baud
rate, data bits, stop bits, parity and connection
type of all comm. ports, as well as the panel ID
number are also changed from this screen, and
should coincide with the setup of the other device.
Note: The data communication protocols are
continuously being expanded and improved.
Therefore, you should consult Frick® Controls
for the exact details on your particular unit(s)
before developing system software to inter-
face with the panel.
QUANTUM™ LX COMMUNICATIONS PROTO-
COL LIST
The Quantum™ LX controller has the capability of
communicating to the outside world through the
following software protocols:
• Frick®
• Allen-Bradley DF-1 Full Duplex
• Allen-Bradley DF-1 Half Duplex
• Modbus ASCII
• Modbus RTU
• Modbus TCP
• Ethernet/IP
CHECKLIST FOR SETTING UP COMMUNICA-
TION
1. Decide which Quantum™ protocol you can
communicate with and want to use.
2. Setup your device’s communication port with
the proper parameters and select a baud rate.
3. Next, setup the Quantum™ LX for the desired
communication protocol. Select the protocol
from the Communications screen.
4. Set the baud rate of the Comm Port to coin-
cide with the setup of your device’s commu-
nication port.
5. Enter the Quantum™ LX ID. This will be used
to identify commands that are sent to it.
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