Johnson Controls QUANTUM LX, Setup

Page: 19 / 140

QUANTUM™ LX COMPRESSOR CONTROL PANEL
COMMUNICATIONS SETUP
090.020-CS (JUNE 11)
Page 19
If you properly receive data and need to com-
municate to more than one panel, then setup
and wire to another panel. Reference the wir-
ing 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.
FRICK
®
PROTOCOL
DESCRIPTION
All commands for Frick® protocols must
be in ASCII to be recognized (see the Con-
version Chart For Decimal / Hexadecimal
/ ASCII, located later in this manual). The
commands can be in upper or lower case
letters. A compressor with an ID code of
[00] is considered disabled. ID codes from
[01] through [99] are valid and recognized
by the Quantum™.
FRICK® # PROTOCOL SPECIFICATIONS
Frick # protocol consists of commands that
are available for most other existing mod-
els of Frick compressor control panels. The
Frick # protocol does not utilize a checksum.
It is better to use Frick Quantum™ ($) pro-
tocol when only communicating to Quan-
tum™ 4A or Quantum™ LX panels.
When there is more than one panel, a Quan-
tum™ LX can be wired from its communica-
tions ports to another panels’ ports, or can
be wired to Port 1 of a RWB, RDB, RXB or
RXF Micro Plus panel.
Frick
®
RWB, RDB, RXB, or RXF Panel Frick® #
Communications Port #1 RS-422 Pinout
9 - TX (Transmit)
8 + TX (Transmit)
5 - RX (Receive)
4 + RX (Receive)
The following is a complete list of available Frick® Proto-
col # commands:
COMMAND CODE and DESCRIPTION
I = Returns compressor status (I) nformation
R = Compressor sta (R) t control
S = Compressor (S) top control
A = Return full load (A) mps information
V = Slide (V) alve/Slide stop control
MC = Change (M) ode of (C) ompressor
MV = Change (M) ode of Slide (V) alve
P = Return (P) ressures information
T = Return (T) emperatures information
Q = (Q) uery setpoints data
C = Enter (C) hange setpoints mode
F = Return (F) ailures
KF = (K) Clear (F) ailures
KR = (K) Clear remaining (R) ecycle delay time
All data is returned as integer values. If decimal positions
are assumed, then divide the data by the proper multiple
of 10 to get the actual value.
Temperature data, except for Suction Temperature, is
returned in the current temperature units as 3 charac-
ters with no decimal position (i.e. 032 would represent
32 degrees Fahrenheit if the panel temperature units are
in Fahrenheit, or it would represent 32 degrees Celsius, if
the panel temperature units are in Celsius). Suction Tem-
perature is returned as 4 characters with a + or – as the
leading character (i.e. –010 would represent –10 degree).
Pressure data is usually returned in the current pressure
units. However, the Filter differential reading is always re-
turned in PSIA. When in PSIG or in PSIA, the pressure
data is returned as 3 characters with no decimal position.
However; in order to show the full transducer range, the
#IDPS command returns 4 characters with one decimal
position assumed. The #IDI, and #IDPA commands return
3 characters that assume one decimal position; therefore,
99.9 is the highest value that can be returned. When in
PSIG, suction pressure is returned in PSIA. When in Bar
and BarA, the pressure data is returned as 4 characters
with two decimal positions assumed. When in KpaA, the
pressure data is returned as 4 characters with no decimal
position.