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SERIAL PROTOCOL
DESCRIPTION
The use of serial communication protocols permits
data transmission between devices. Protocol deter-
mines how contact is established and how the query
(question) and response (answer) takes place. The
information in a message command requires:
•
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 (checksum).
When using any of the communications ports, check
what communication protocol has been selected
from the Configuration > Communications > Serial
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 match 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 interface
with the panel.
QUANTUM™ HD COMMUNICATIONS PROTOCOL
LIST
The Quantum™ HD controller has the capability of
communicating to the outside world through the fol-
lowing 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 COMMUNICATION
1.
Decide which Quantum™ protocol you can com-
municate 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™ HD for the desired
communication protocol. Select the protocol
from the Serial screen.
4.
Set the baud rate of the Comm Port to coincide
with the setup of your device's communication
port.
5.
Enter the Quantum™ HD ID. This will be used to
QUANTUM™ HD COMPRESSOR CONTROL PANEL
COMMUNICATIONS SETUP
identify commands that are sent to it.
6.
Wire to the first panel via RS-422, or RS-485 to
the Quantum™ HD Comm Port.
7.
Send a single command to read data from this
Quantum™ HD using its ID.
8.
Check if you received a data response at your
device.
9.
Troubleshooting when you don't receive a data
response:
•
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™ HD understands it is receiving a
properly composed message.
•
Check that the RX I/O communication
activity lamp on the Quantum™ Inter-
face Board is blinking as it receives the
instruction from your device (Comm 1
or 2 only).
•
A steady lit RX LED or one that isn't
lighting, are signs of improper wiring.
(Comm 1 or 2 only)
•
If the RX LED is properly blinking, then
check if the TX LED is blinking in re-
sponse (Comm 1 or 2 only).
•
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 (Comm 1 or 2
only).
•
If the TX is blinking, then check that the
Comm Port communication jumpers are
correct (Comm 1 or 2 only).
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™ HD 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.
090.040-CS (JAN 14)
Page 17
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