Lutron Electronics RadioTouch RTA-RS232 Operating and safety instructions

R
Please Read
Advanced Programming
Delete a Zone 20
Modify Reply Back Settings 21
Modify Acknowledgment Settings 22
Operation
Set Up Scenes (accessed from Tabletop/Wall
Control, single zone) 23
Set Up Scenes (not accessed from Tabletop/
Wall Control, multiple zone) 24
Troubleshooting Guide 25
ASCII to Hexadecimal Conversion 26
Warranty 27
Contacts 28
Contents
Installation
System Overview 2
Mounting 4
Programming
Determine Zone Types and Number 5
Configure Zone Types 6
Add a Zone 7
Set Data Flow Control Method 8
Protocol
General Notes 9
Command Summary 12
Device Control Commands 14
Configuration Commands 17
Monitoring Control 19
Setup and Installation Guide
RTA-RS232
RadioTouchTM RS232 Interface
This manual is an addendum to the RadioTouch Installer’s Guide. The procedures to set up a RadioTouch
RS232 interface are contained in this manual. The RadioTouch RS232 interface is simply another transmitter in the RadioTouch
System. The RS232 interface has the ability to communicate with up to 10 unique zones of lights, Sivoia® QED shades, or
contact closure outputs in a single room. This device can not report the status of the lighting zones, Sivoia QED shades, or
contact closure outputs back to the host RS232 device.
Danger! This RadioTouch system must not be used to control equipment, other than lighting, which is not visible from
every transmitter location. It also must not be used to control equipment which could create hazardous situations
such as entrapment if operated accidentally. Examples of equipment which must not be controlled by this RadioTouch
system include (but are not limited to) motorized gates, garage doors, industrial doors, microwave ovens, heating
pads, etc. It is the installer's responsibility to ensure that the equipment, other than lighting, being controlled is visible
from every transmitter location and that only suitable equipment is connected to this RadioTouch system.
FCC Information
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on. The user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Caution: Changes or modifications not expressly approved by Lutron Electronics Co., Inc. could void the user's authority to
operate this equipment.
R a dio T ou c h
TM
Coopersburg, PA 18036 USA
R T A - R X - F - S C
LISTE D 243C
I nd . C ont . E q .
12 345678910
11 12 13 1 4 15 1 6
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PS S
ig
P/N 500-10634
©
2006 Lutron Electronics Co., Inc.
12345
O N
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
®
www.lutron.com
15
V
C O N FIG URAC IO N ES
R EGL A GES
SETTI
N GS
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
120/277 V 60 Hz
16 A Max.
0-10
V

R
2 RadioTouchTM RTA-RS232 Programming and Operation Guide
System Overview
This manual contains information on how to set up
and install an RS232 interface. It also contains
information regarding the RS232 command set and
how to interface the RTA-RS232 with equipment
external to the RadioTouch system.
The RTA-RS232 allows an external device, such as a
touch screen, to control RadioTouch lighting and
window shading loads.
The RadioTouch RS232 interface is capable of
controlling 10 unique lighting or contact closure
output zones in the RadioTouch system.
Note: The RS232 Interface will not operate until it
has been programmed.
• After 10 minutes with no button presses, the display
will turn OFF. To restore the display, press and
release any button on the RS232 interface or send
an RS232 command.
TX R X
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640© 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
Left Scroll Button
(scrolls the left display)
Right Scroll Button
(scrolls the right display)
LED Display
TX LED
(flutters when transmitting)
RX LED
(flutters when receiving)
ADDR (address) button
Power LED
(indicates device has power)
Power Jack
CONF (configuration) button
(cycles through modes of operation)
OK button
(selects displayed option)
RS232 connector

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 3
Installation
Important Notes
• Install in accordance with all national and local
electrical codes.
• Do not paint the RS232 interface.
• Operate in ambient temperatures of 32 - 104 °F
(0 - 40 °C).
• Use only the AC adapter provided by Lutron with
your RS232 interface unit. The AC adapter
provided has the following electrical characteristics.
- Input: 120 V 60 Hz
- Output: 9 V 500 mA; PELV (Class 2: USA)
• It is recommended that the transmitters (such as
the RS232) in a RadioTouch system should not be
placed more than 35 ft. (10.7 m) from the receivers
that each transmitter controls. The range and
performance of the RadioTouch system is highly
dependent on a variety of complex factors such
as:
- Distance between system components
- Construction of walls separating system
components
- Electrical equipment located near system
components
Location
Place the RS232 in a convenient and accessible
location.
Note: The RS232 must be located within 35 ft.
(10.7 m) of all RadioTouch controllers in the room.
Mounting
Using two screws, mount the RTA-RS232 to a 4 x
4 in. (120 x 120 mm) junction box or directly to a
wall (screws and wall anchors are provided) as
shown.
W
A
L
L
W
A
L
L
U p
D own
A ss ign m e nt M od e
L eve l S e t M od e P ow e r S e l ec t
R T A - S C I
S wi t c h C lo s u r e I n t e r f ace T r a n s m i tt e r
C oop e r s bu r g ,P A 18036
R a dio T ou c h
TM
ST A T U SI ND I CA TO R OP E RA TIO N
Slow Blink -Normal Operation Mode
Fast Blink - Program Mode
Very Fast Blink - Error Indication
P ow e r
T e r m in a l c onn ec t ion s a r e
C l ass 2 .
© 2000-2003 Lutron Electronics Co., Inc.
S ee I n s t a ll e r s G uid e fo r S ys t e m
A dd r ess ing a nd P r og r a mm ing
I n s t r u c tion s
RadioTouchis a trademark of Lutron Electronics
Co., Inc. This product may be covered by one or
more of the following U.S. patents: 5,248,919;
5,399,940; 5,736,965; 5,798,581; 5,838,226;
5,848,054; 5,905,442, 5,982,103
18V AC
Input
910
11 12 13 14 15 16
I
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t
1
I
npu
t
2
I
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t
3
I
npu
t
4
I
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5
I
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7
C
o
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on
Switch Closures
M od e
E nt e r
S c r oll
S t a tu s
LE D
I nput LE D s
M od e LE D A
M od e LE D B
P ow e r
LE D
I
npu
t
6
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 00 06 0 2006 L El i C I
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL

R
4 RadioTouchTM RTA-RS232 Programming and Operation Guide
Dimensions and Mounting
Attach the Power Supply
Remove terminal cover. Route the power supply
cord through the knockouts located on either side
of the unit. Place the provided grommet in the
knockout hole before wiring. Attach the power
supply cord to the RS232 (jack located in the
bottom right corner).
Caution! Observe all local and national
electrical codes and safety standards.
Danger! Do not connect line voltage to the
RTA-RS232. Connecting line voltage can
result in personal injury or damage to the
control or other equipment.
Connect the RS232 Cable
For 3 wire software flow control or no flow
control, connect the three (3) RS232 wires to the
connector as shown below, or remove the terminal
block adapter and plug in a DB-9 male RS232
cable directly to the RS232 connector on the
interface.
For 7-wire hardware handshaking, you must use
the DB-9 cable method.
To select the proper flow control cable for your
application, see the Protocol General Notes
(page 11).
If you are not using the DB-9 cable method, the
RS232 cable should enter unit through a knockout
hole located on either side of the unit. Place the
provided grommet in the knockout hole before
wiring.
TX R X
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640© 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
Remove
terminal cover
TX R X
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640© 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
Route wires
through
punched holes
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640 © 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640 © 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
TX R X
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640© 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
TX R X
C
o
mm
on
D
a
t
a
I
n
D
a
t
a
O
ut
TX R X
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640© 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640 © 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
RTA-RS232
Coopersburg, PA 18036
RadioTouch
TM
P/N 500-10640 © 2006 Lutron Electronics Co., Inc.
910
11 15 16
COM
RX
TX
CONF
OK ADDR PWR
TX RX
PELV (CLASS 2:USA)
9 V
60 Hz
300 mA
RS232
STAT
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
PELV (CLASS 2:USA)
OPTIONAL
COM
RX
TX
COM: Common wire
RX: Data In (from the host device to
the RTA-RS232 interface
TX: Data Out (from the RTA-RS232
interface to the host device
3-wire connection DB-9 connection
Plug In the Power Supply
Danger! Plug the power
supply into a 120 V
outlet only.

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 5
Programming
Determine Zone Types and
Numbers
Fill in the table below before beginning to program
your RadioTouch RS232 Interface.
Note: Leave the completed table below with
the building or A/V maintenance group. This
information is important in system
troubleshooting and reprogramming.
Room Location:
Zone No. Zone Description Zone Type LED
= Unassigned Display
= Lights Readout
= Unused
= Contact Closure
0
1
2
3
4
5
6
7
8
9
Example

R
6 RadioTouchTM RTA-RS232 Programming and Operation Guide
Programming
Configure Zone Types
A.Press and hold the CONF and ADDR buttons for 5
seconds to enter unit configuration mode. The LED
display will begin flashing UC to alert you that the
unit has entered unit configuration mode.
B.Press the CONF button repeatedly until the display
shows CC. Press the OK button to begin configuring
zone types.
To configure a zone, use the table you filled in on the
previous page.
C.Use the left scroll button to select the zone number
you wish to program. Use the right scroll button to
select the correct zone type (L, -, or C).
D.Once the correct zone number and type are
displayed, press OK to confirm the setting. The three
LEDs will flash to alert you that the change has been
made.
Repeat these steps until all your zones have been
configured.
Press and hold the CONF and ADDR buttons for 5
seconds to exit unit configuration mode.
TX R X
Press and hold for 5 seconds to enter or exit unit
configuration mode.
TX R X
Press CONF until the
display shows CC.
Then press OK.
TX R X
Use the left scroll
button to change the
zone number.
Use the right scroll
button to change the
zone type.
TX R X
Press OK to confirm this zone
setting, then use the scroll
buttons to set the next zone.
A
B
C
D

Programming
Add a Zone
A.Press and hold the CONF and ADDR buttons for 5
seconds to enter unit configuration mode. The LED
display will begin flashing UC to alert you that the
unit has entered unit configuration mode.
B.Press the CONF button repeatedly until the display
shows AS. Press the OK button to begin addressing
zones.
C.To add a zone, press the left scroll button until the
zone number you wish to address is displayed. Press
the ADDR button and the display will show P with
the zone number to be programmed, and the ADDR
LED will turn on.
D.On the RadioTouch controller you wish to add to the
RS232 interface zone, press and release the PROG
button. The lights will cycle up and down for 3
seconds to notify you that you are in programming
mode, and settle at 50% light output. If you are using
an RTA-RX-SW, the lights will cycle off and on. The
Status LED on the controller will be in fast blink
mode. If no lights are connected to this controller,
the status LED will be your only feedback.
E.On the RS232 interface, press and hold the left scroll
and OK buttons for 5 seconds. When the controller
has added the RS232 zone, the lights will flash or
cycle off and on. If no lights are connected to this
controller, hold the buttons until the 3 LEDs around
the display flash (approximately 5 seconds).
Note: To add a zone to an RTA-RS232 interface
shipped before August 2002 (date code K31), press
and hold the right scroll and OK buttons instead.
On the controller, press the PROG button to exit
program mode. The lights will go to high end, and
the STAT LED will return to slow blink mode. If you
are using an RTA-RX-SW, the lights will cycle off and
on.
Repeat these steps for any other controllers that
should be controlled by this zone of the RS232
interface.
Press and hold the CONF and ADDR buttons for 5
seconds to exit unit configuration mode. The display
will start to sequence (approximately 5 seconds).
R
RadioTouchTM RTA-RS232 Programming and Operation Guide 7
TX R X
Press and hold for 5 seconds to enter or exit unit
configuration mode.
TX R X
Press CONF until the LED
display reads AS.
Then press OK.
TX R X
Press the left scroll button
to display the desired zone
number.
Press ADDR to display P
in the left window and
light the ADDR LED.
TX R X
Press and hold the left scroll and OK buttons on the
interface for 5 seconds.
PROG button
RadioTouch controller
(this step only)
Status LED
R a dio T ou c h
TM
Coopersburg, PA 18036 USA
R T A - R X - F
LISTE D 243C
I nd . C ont . E q .
®
C O N FIG URAC IO N ES
R EGL A GES
SETTI
N GS PW
R ST A TP R OG 100 H r / 100
%
12 345678
O
cc
.
C
o
m
O
cc
. S
ig
24
V
C
i
r
C
o
m
+
_
0-10
V
PS S
ig
PELV (
C
l
ass
2
:
U
S
A
)
P/N 500-10633 © 2006 Lutron Electronics Co., Inc.
12345
O N
USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
15
V
®
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
120/277 V 60 Hz
16 A Max.
12345678
12345
ON
A
B
C
D
E

R
8 RadioTouchTM RTA-RS232 Programming and Operation Guide
Programming
Set Data Flow Control Method
No flow control is the default for the RS232 Interface.
If you are using no flow control, you have completed
the Start-Up of the RS232 Interface.
If you are using full seven-wire hardware
handshaking or three-wire software flow control,
continue with this step.
A.Enter unit configuration mode by pressing and
holding the CONF and ADDR buttons for 5 seconds.
The LED display will begin flashing UC when the unit
has entered unit configuration mode.
B.Press the CONF button repeatedly until the display
shows HS, then press the OK button and the current
flow control setting will be displayed on the right LED
display.
C.Press the right scroll button to select between S
(software flow control), H (hardware handshaking),
and – (no flow control).
When the desired letter is displayed, press the OK
button to confirm this setting. The 3 LEDs around
the display will flash to signal the change has been
made.
Note: Pressing the left scroll button will display the
current configuration for this mode.
Exit unit configuration mode by pressing and holding
the CONF and ADDR buttons for 5 seconds until the
display starts to sequence.
TX R X
Press and hold for 5 seconds to enter or exit unit
configuration mode.
TX R X
Press CONF until the LED
display reads HS.
Then press OK.
A
B
TX R X
Use the right scroll
button to change the
data flow control
method.
C

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 9
Protocol
General Notes
This section describes the commands available to
control a RadioTouch system via the RadioTouch
RS232 interface, model number RTA-RS232.
Communication Settings
To configure your device to talk to the RadioTouch
RTA-RS232 interface, use the data conventions
listed below.
9600 BAUD
8 Data Bits
1 Stop Bit
No Parity
For definition purposes, the host is considered the
Data Terminal Equipment (DTE) and the RTA-
RS232 is considered the Data Communications
Equipment (DCE).
Typical Interface Wiring
The RTA-RS232 is designed to accept a standard
9-pin serial cable to interface to the host. The RTA-
RS232 also includes an adapter that allows
terminal block connections to the RTA-RS232.
This adapter is for use with software flow control or
no flow control only. The following table describes
each connection scheme.
COM
RX
TX
54321
9876 123
Pin Name Description DB-9 Serial Cable RTA-RS232
Pin Connection Terminal Block
Connection
DCD Data carrier detect (not used) 1 -
RX Host data in/RTA-RS232 data out 2 3
TX Host data out/RTA-RS232 data in 3 2
DTR Data terminal ready 4 -
GND Ground/Common 5 1
DSR Data set ready 6 -
RTS Request to send 7 -
CTS Clear to send 8 -
RI Ring indicator (not used) 9 -
Female DB-9
pinout for RS232
interface
Terminal block
connections for
RS232 interface

R
10 RadioTouchTM RTA-RS232 Programming and Operation Guide
Protocol (continued)
Zones
A zone is an accessory or group of accessories,
such as lights or Sivoia QED controllable shades,
controlled simultaneously as a single unit. The
RS232 interface can control up to 10 zones,
numbered 0 through 9. Each zone can be
configured as lights or contact closures. As shades
are controlled by a RF controller’s contact closure
outputs, shade zones are configured as contact
closures zones.
Functions
The following functions are available through the
RTA-RS232.
Setting Lighting Zone Levels
Lighting zone level refers to the intensity of the
light. The zone may be set to an explicit level, a
preset level, or raised/lowered. The explicit levels
include a continuous range, or a specific level. See
page 15 for a complete description of each explicit
level.
For a continuous range, a value of 0 indicates off;
a value between 1 and 100 represents intensity, in
percent, between low end and high end.
There are a total of 16 presets available. Preset
light intensities are stored in the RF controller.
When an RF controller receives a Preset
command, it adjusts its light intensity to the value
stored in the Preset.
When the RTA-RS232 receives a command to
raise or lower the zone intensity, it commands the
intended zone to raise (lower) its intensity for 5
seconds, or until it receives the ESTP (End Step)
command.
Controlling Contact Closures
Contact closure zones respond only to preset
levels. Any other type of level will result in an error.
When a contact closure zone receives a preset
command, it will activate the switch closure
associated with that preset for 250 milliseconds. If
the preset number is greater than 5, it will ignore
the data and send an error message if the unit is in
Reply Back Mode.
Setting Presets
The preset light level for a lighting zone may be set
via the RTA-RS232. In order to do this, however,
DIP Switch 1 on the RF controller in the intended
zone must be in the down position or the zone
must have received the enter Preset Adjust Mode
from the RS232 interface or one of the transmitters
in the room. Once this is done, any or all the
presets for that zone may be set. Once the presets
are set, the DIP Switch on the RF Controller must
be placed in the up position or the exit Preset
Adjust Mode command must be sent.
System Configuration
When setting the RTA-RS232 configurations, the
host must first enter Configuration Mode. After
completing the configurations, the host must then
exit Configuration Mode. If the system is in
Configuration Mode, the only commands that the
RTA-RS232 will execute are Configuration
commands. All other commands will be ignored.
Conversely, if the RTA-RS232 is not in
Configuration Mode, it will ignore Configuration
Commands.
Zones
Zones may be configured as one and only one of
the following: Lights, Contact Closures, or
Unassigned. There are a total of 10 zones available
on the RS232 interface, numbered 0-9. These
zones may be configured either by software
control over the data link, or manually using the
programming buttons on the RTA-RS232 unit. The
default zone configuration is Unassigned.
Reply Back
The RTA-RS232 has the ability to reply to the host
whether it processed the last command
successfully or not. This mode can be turned on or
off. If Reply Back is turned on, and the RTA-RS232
successfully processes a command, the RTA-
RS232 will respond to the host with:
~OK<CR>

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 11
Protocol (continued)
In addition, if the RTA-RS232 is in Configuration
Mode and Reply Back Mode is on, the RTA-
RS232 will echo back the last command upon
successful completion. For instance, if Zone 1 is to
be configured as lights; the following data is
transferred
Host :CON,TYPE,1,L<CR>
RTA-RS232 ~CON,RPT,TYPE,1,L<CR>
If the command is not successfully processed by
the RTA-RS232, it will respond to the host with:
~ERROR,error number<CR>
See Error Codes on page 15 for a list of error
numbers and error descriptions. The default setting
for Reply Back Mode is ON.
Acknowledge
The RTA-RS232 has the ability to inform the host
when it has completed RF transmission of an
RS232 command. This mode can be turned on or
off. After completing RF transmission, the RTA-
RS232 will respond to the host with:
~ACK<CR>
The default setting for Acknowledge Mode is OFF.
ADD/DELETE RTA-RS232
Each utilized zone of the RTA-RS232 needs to be
addressed to the RF controller(s) it is intended to
control. See the RadioTouch Installer’s Guide for
information on addressing.
Data Flow Control
The RTA-RS232 Interface can only accept one
command at a time. When it is done processing
this command, it will inform the host it is ready to
receive more data. The method by which it informs
the host depends whether it is using Hardware
Handshaking, Software Flow Control or No Flow
Control.
Hardware Handshaking
The RadioTouchTM RS232 interface supports full
hardware handshaking. In this mode, the system
utilizes TX, RX, CTS, RTS, DTR, DSR, and Ground.
Software Flow Control
If hardware handshaking is not being used, care
must be taken to ensure all messages are
captured. Once the Host issues a command, it
cannot issue another one until the RTA-RS232
issues a prompt “!” (ASCII 33d).
No Flow Control
In No Flow Control Mode the RTA-RS232 will not
provide any indication that it is able to receive
more data from the host. In order to prevent
messages from being lost, the host must ensure
that each message transmitted to the RTA-RS232
is separated by at least 400ms. No Flow Control is
the default setting.

R
12 RadioTouchTM RTA-RS232 Programming and Operation Guide
Command Set
General Command Structure
All commands are sent as ASCII characters.
Numerical data fields are the ASCII representation
of the decimal value.
There should be no spaces between characters.
Each command has a prefix, a limited number of
fields, and an end character. All commands from
the Host device will have a prefix of a colon, :, and
an end character of a carriage return, <CR>. All
responses from the RTA-RS232, except for the
prompt, will have a prefix of a tilde, ~, and end
with a carriage return, <CR>. Each field is
separated by a comma.
Command Format :Command,[Parameters],{Extended Parameters}<CR>
:Indicates start of command
,Field Separator
Command Command as shown
Parameters Zone number or other parameters relevant to the command
Extended Parameters Parameters that do not apply to all variations of a particular command
<CR> Carriage Return, ASCII character 13d – indicates end of command
If your equipment does not support the transmission of ASCII characters, you will need to convert the messages
from ASCII to whatever form your equipment supports, i.e. hexadecimal. For example, to command the RS-232
Interface to set zone one to preset one, the ASCII text command :PS,1,1<CR> is issued:
ASCII : P S , 1 , 1 <CR>
Hexadecimal 3A 50 53 2C 31 2C 31 0D
See page 26 for an ASCII to hexadecimal conversion table.

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 13
Command Set (continued)
Command Summary
RTA-RS232 Commands
Command Description Page
PS Sets the indicated zone to a predetermined preset level 14
XC Sets the intended zone to an explicit level between the minimum and maximum levels 15
BSTP Tells the RTA-RS232 to raise or lower the level for the indicated zone 15
ESTP Tells the RTA-RS232 to stop raising or lowering the zone level 15
PSA Tells the indicated zone to enter/exit Preset Adjust mode 15
SPS Programs the indicated preset level to the current light level 16
PHC Tells the indicated zone to enter/exit daylight sensor calibration mode 16
PING Forces a prompt from the RTA-RS232 (used on power-up to start data flow) 16
Configuration Commands
Command Description Page
ENTER Tells the RTA-RS232 to enter Configuration mode 17
EXIT Tells the RTA-RS232 to exit Configuration mode 17
TYPE Sets the zone type to Lights, Contact Closures, or Unassigned 17
RB Tells the RTA-RS232 to turn Reply Back mode on or off 17
ACK Turns Acknowledgment mode on or off 17
ADD Adds the RTA-RS232 to an RF controller 18
DELETE Deletes the RTA-RS232 from an RF controller 18
RPT Allows the host to query the configuration settings of the RTA-RS232 18
RTA-RS232 Responses
Command Description Page
! (PROMPT) Tells the Host there is room in the RTA-RS232 buffer for another command 19
CON Informs the host of the current configuration settings 19
ERROR Provides error codes when an error is detected (Reply Back mode must be on) 19
OK Responds OK when a command is successfully processed (Reply Back mode must be on) 19
ACK Issued by the RTA-RS232 when it complete RF transmission of the current command 19
(if Acknowledgment mode is turned on)

R
14 RadioTouchTM RTA-RS232 Programming and Operation Guide
Command Set: RTA-RS232 Commands
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
PS (preset)
Sets the indicated zone to a predetermined preset level
:PS,[zone number],[preset number]<CR>
Zone number: 0 through 9
Preset number: 0 through 16
:PS,6,5<CR> Sets the level for zone 6 to preset level 5
Preset Light Levels: 16 are available with the RS232 interface. Presets 1through 5
correspond to buttons on a RadioTouch wall control (see below) and will take the
RF controller to the same light level as a button press on the wall control. Presets 6
through 8 can be accessed only via the RS232 interface or the RTA-SCI. Presets 9
through16 can be accessed only via the RS232 interface.
Preset Contact Closures: 5 are available on a RTA-RX-F-SC controller and can be
accessed with the RS232 interface using presets 1 through 5. Contact closure
outputs are primarily used to control Sivoia QED controllable window treatments,
AC motorized shades, and projection screens.
ON
OFF
RTA-WX-5B RTA-WX-2B or
RTA-WX-2BSW
Preset 1
Preset 2
Preset 3
Preset 4
Preset 5
Lights
Shades
Projection
Closure/Preset 2
Closure/Preset 4
Closure/Preset 3
Closure/Preset 1
Closure/Preset 5
RTA-WX-F-SC
OPEN
STOP
CLOSE
UP
DOWN
OPEN
PRESET
CLOSE
AC Shades
RTA-WX-C3LB
Projection
Screens
RTA-WX-C2LB
Sivoia QED
Shades
RTA-WX-Q3LB
Preset 2
Preset 4
Preset 3
Preset 2
Preset 4
Preset 3
Preset 2
Preset 4
Note: Press any button (or activate
any preset) when Sivoia QED
shades are moving to stop them
where they are.

Command Set: RTA-RS232 Commands
R
RadioTouchTM RTA-RS232 Programming and Operation Guide 15
Command Name
Description
Syntax
Allowed Values
Examples
Additional Information
XC (explicit)
Sets the indicated zone to an explicit level between the minimum and maximum
levels. Applies to lighting zones only.
:XC,[zone number],[level]<CR>
Zone number: 0 through 9
Level: 0 through 100; or command from table below
:XC,1,57<CR> Sets the level for zone 1 to 57%
:XC,4,OFF<CR> Turns zone 4 off
Explicit Zone Levels
Level/Command Description
0 - 100 Light intensity in percent; 0 = off
ONLAST If zone is off, sets to previous level
If zone is on, stays at current level
OFF Turns lights off (0%)
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
BSTP (begin step)
Raises or lowers the level for the indicated zone.
:BSTP,[zone number],[step type]<CR>
Zone number: 0 through 9
Step type: RAISE or LOWER
:BSTP,9,RAISE<CR> Tells zone 9 to raise
The RTA-RS232 will continuously raise or lower the zone level until it receives the
end step command (ESTP), or until it times out. The timeout period for lighting
zones is 5 seconds.
Note: If the zone is currently off, RAISE will turn the zone on. The LOWER
command will not turn a zone off; the zone will reduce to minimum level. Only one
zone can raise or lower at a time, and no other commands may be executed while
that zone is raising or lowering.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
ESTP (end step)
Stops raising or lowering the level for the current zone.
:ESTP<CR>
N/A
:ESTP<CR> Stops raiding or lowering a zone level
This command must follow BSTP to tell the zone to stop raising/lowering.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
PSA (preset adjust mode)
Tells the indicated zone to enter or exit preset adjust mode.
:PSA, [zone number], [action type]<CR>
Zone number: 0 through 9
Action type: ENTER or EXIT
:PSA,4,ENTER<CR> Tells zone 4 to enter preset adjust mode
While in preset adjust mode, RadioTouch controllers will not respond to preset
commands.

R
16 RadioTouchTM RTA-RS232 Programming and Operation Guide
Command Set: RTA-RS232 Commands
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
SPS (set preset)
Programs the preset value to the current light level.
:SPS,[zone number],[preset number]<CR>
Zone number: 0 through 9
Preset number: 1 through 16
:SPS,4,3<CR> Programs preset 3 on zone 4
To program a preset, either DIP switch 1 on the RadioTouch controller must be in
the down position, or the PSA (enter preset adjust mode) command must have
already been sent. Refer to the RadioTouch Installer’s Guide for more details on
programming presets. This command need only be sent once to program a preset.
Note: Any changes to presets 1 through 5 will be mimicked in all RadioTouch
transmitters in the room. If this is undesirable, use presets 6 through 16.
The default light intensities for presets 1 through 5 on the RF controllers are as
follows:
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
PHC (daylight sensor calibration mode)
Tells the intended zone to enter or exit daylight sensor calibration mode..
:PHC,[zone number],[action type]<CR>
Zone number: 0 through 9
Action type: ENTER or EXIT
:PHC,7,ENTER<CR> Tells zone 7 to enter daylight sensor calibration mode
While in daylight sensor mode, RadioTouch controllers will not respond to preset
commands.
Command Name
Description
Syntax
Allowed Values
Example
Response
Additional Information
PING
Forces a prompt from the RTA-RS232 (used on power-up to start data flow).
:PING<CR>
N/A
:PING<CR> Sends the PING command to the RTA-RS232
!<CR> Reply from the RTA-RS232
This command is used in the event that the RTA-RS232 powers up before the Host
and the data flow control is set to Software. In this case, the Host will miss the
initial Prompt that the RTA-RS232 issues at power up. It is possible that the host
will then wait for a prompt, and will never receive one. The PING command is a
nonintrusive way to kick-start data flow. When the RTA-RS232 receives the PING
command, it simply responds with a PROMPT.
ON
OFF
Preset 1: 100%
Preset 2: 40%
Preset 3: 10%
Preset 4: 1%
Preset 5: 100%

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 17
Command Set: Configuration Commands
The following commands will configure the RTA-RS232 product. Each is prefixed with the CON command.
When setting the RTA-RS232 configurations, the host must first enter configuration mode on the RTA-
RS232. After completing the configurations, the host must then exit configuration mode on the RTA-
RS232. If the system is in configuration mode, the only commands that the RTA-RS232 will execute are
configuration commands. All other commands will be ignored. Conversely, if the RTA-RS232 is not in
configuration mode, it will ignore all configuration commands.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
ENTER/EXIT (enter or exit configuration mode)
Tells the RTA-RS232 to enter or exit configuration mode.
:CON,[command]<CR>
Command: ENTER or EXIT
:CON,ENTER<CR> Tells the RTA-RS232 to enter configuration mode
The ENTER command must be executed to set RTA-RS232 configurations; the
EXIT command must be executed after the configuration is complete. When the
system is in configuration mode, the only commands the RTA-RS232 will execute
are configuration commands.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
TYPE (set zone type)
Sets the zone type to lights (L), contact closures (C), or unassigned (-).
:CON,TYPE,[zone number],[type]<CR>
Zone number: 0 through 9
Type: L (lighting zone), C (contact closure zone), or - (unassigned)
:CON,TYPE,5,L<CR> Sets zone 5 as a lighting zone
Type S is an unused zone type; do not use.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
RB (reply back mode)
Turns reply back mode on or off.
:CON,RB,[status]<CR>
Status: ON or OFF
:CON,RB,ON<CR> Turns reply back mode on
The default state of reply back mode is on.
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
ACK (acknowledgment mode)
Turns acknowledgment mode on or off.
:CON,ACK, [status]<CR>
Status: ON or OFF
:CON,ACK,ON<CR> Turns acknowledgment mode on
The default state of acknowledgment mode is off.

R
18 RadioTouchTM RTA-RS232 Programming and Operation Guide
Command Set: Configuration Commands
Command Name
Description
Syntax
Allowed Values
Example
Additional Information
ADD/DELETE (add or delete the interface from a controller)
Adds or deletes the RTA-RS232 to a RadioTouch controller.
:CON,[function],[zone number]<CR>
Function: ADD or DELETE
Zone number: 0 through 9
:CON,ADD,5<CR> Adds zone 5 of the RTA-RS232 to the controller
To add or delete the RTA-RS232, each controller must be in program mode. See
the RadioTouch Installer’s Guide for more details.
Command Name
Description
Syntax
Allowed Values
Examples
Additional Information
RPT (report configuration settings)
Allows the host to query configuration settings for the RTA-RS232 interface.
:CON,RPT,[category],[parameter]<CR>
Category: TYPE Zone type
HAND Data flow control configuration
RB Reply back mode
ACK Acknowledgement mode
REV Software revision
Parameter: 0 - 9 Desired zone (applies only to TYPE)
M Master microprocessor (applies only to REV)
S Satellite microprocessor (applies only to REV)
:CON,RPT,TYPE,2<CR> Requests zone configuration for zone 2
:CON,RPT,RB<CR> Requests the status of reply back mode
Parameter can be omitted if not applicable. See page 19 for RTA-RS232 responses
to configuration queries.

R
RadioTouchTM RTA-RS232 Programming and Operation Guide 19
Command Set: RTA-RS232 Responses
Command Name
Description
Syntax
Additional Information
PROMPT
Tells the host the RTA-RS232 is ready to receive another command.
!<CR>
Once the host issues a command, it must wait for a prompt from the RTA-RS232
before sending another command.
Command Name
Description
Syntax
Allowed Values
Examples
Additional Information
CON (configuration reports)
Inform the host of the current settings.
~CON,RPT,[category],[zone number],[data]<CR>
Category Zone Number Data
TYPE 0 - 9 L, C, -
HAND HW, SW
RB ON, OFF
ACK ON, OFF
REV #.#
~CON,RPT,TYPE,2,L<CR> Indicates zone 2 is configured as lights
~CON,RPT,RB,ON<CR> Indicates reply back mode is on
~CON,RPT,REV,3.2<CR> Indicates software revision level is 3.2
Zone number may be omitted if not applicable. See page 18 for the RPT
command.
Command Name
Description
Syntax
Allowed Values
Example
ERROR (error codes)
The RTA-RS232 provides an error code when an error is detected.
~ERROR,[err #]<CR>
Err #: 1 Non-configuration command sent while in configuration mode
2 Invalid command
3 Wrong zone type
4 Buffer full
5 Bad EEPROM
6 Configuration command sent while not in configuration mode
~ERROR,2<CR> Last command processed was invalid (syntax or range)
Command Name
Description
Example
OK
The RTA-RS232 informs the host a command was successfully processed.
:PS,6,5<CR> Host requests that level for zone 6 be set to preset level 5
~OK<CR> Response from RTA-RS232 indicates command was successfully
processed.
Command Name
Description
Example
Additional Information
ACK
RTA-RS232 informs the host when it has completed transmission of the current
command.
:PS,6,5<CR> Host requests that level for zone 6 be set to preset level 5
~ACK<CR> Response from RTA-RS232 indicates transmission of current
command was completed.
The default state of acknowledgment mode is off; it must be turned on (see page
17) for the RTA-RS232 to issue this response..

R
20 RadioTouchTM RTA-RS232 Programming and Operation Guide
Delete a Zone on the RS232
Interface from a RadioTouch
Controller
Press and hold the CONF and ADDR buttons for 5
seconds to enter unit configuration mode. The LED
display will begin flashing UC to alert you that the
unit has entered unit configuration mode.
Press the CONF button repeatedly until the display
shows AS. Press the OK button to begin deleting
zones.
To delete a zone, press the left scroll button until the
zone number you wish to delete is displayed. Press
the ADDR button and the display will show P with
the zone number to be programmed, and the ADDR
LED will turn on.
On the RadioTouch controller you wish to delete from
the RS232 interface zone, press and release the
PROG button. The lights will cycle up and down for
3 seconds to notify you that you are in programming
mode, and settle at 50% light output. If you are using
an RTA-RX-SW, the lights will cycle off and on. The
Status LED on the controller will be in fast blink
mode. If no lights are connected to this controller,
the status LED will be your only feedback.
On the RS232 interface, press and hold the right
scroll and OK buttons for 5 seconds. When the
controller has deleted the RS232 zone, the lights will
flash or cycle off and on. If no lights are connected to
this controller, hold the buttons until the 3 LEDs
around the display flash (approximately 5 seconds).
Note: To delete a zone from an RTA-RS232 interface
shipped before August 2002 (date code K31), press
and hold the left scroll and OK buttons.
On the controller, press the PROG button to exit
program mode. The lights will go to high end, and
the STAT LED will return to slow blink mode. If you
are using an RTA-RX-SW, the lights will cycle off and
on.
Repeat these steps to delete additional zones from
this RS232 interface.
Press and hold the CONF and ADDR buttons for 5
seconds to exit unit configuration mode. The display
will start to sequence (approximately 5 seconds).
Advanced Programming
TX R X
Press and hold for 5 seconds to enter or exit unit
configuration mode.
TX R X
Press CONF until the LED
display reads AS.
Then press OK.
TX R X
Press the right scroll
button to display the
desired zone number.
Press ADDR to display P
in the left window and
light the ADDR LED.
TX R X
Press and hold the right scroll and OK buttons on the
interface for 5 seconds.
PROG button
RadioTouch controller
(this step only)
Status LED
R a dio T ou c h
TM
Coopersburg, PA 18036 USA
R T A - R X - F
LISTE D 243C
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®
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P/N 500-10633 © 2006 Lutron Electronics Co., Inc.
12345
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USA, Canada
1-800-523-9466
Mexico
1-888-235-2910
www.lutron.com
15
V
®
Refer to the Installers Guide for more
detailed instructions.
Consulte la Guía de Instaladores para
información más detallada.
Référer au Guide d’installation pour plus de
renseignements détaillés.
120/277 V 60 Hz
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