Lutron Electronics RadioTouch RTA-RS232 Setup And Installation Manual page 17

Notes on Protocol
Zones
A zone is an accessory, or group of accessories, such as lights or Sivoia Motorized Shades, controlled
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simultaneously as a single unit. The RadioTouch RS232 Interface can control up to 10 zones, numbered 0
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through 9. Each zone can be configured as lights, Sivoia Motorized Shades, or Contact Closures.
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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 21 for a complete
description of each explicit level.
For a continuous range, a value of 0 indicates off; whereas, 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) it's intensity for 5 seconds, or until it receives the ESTP (End Step) command.
Light zones will not accept a level of ALLUP or ALLDOWN. Commands for these types of levels will result in an
error.
Controlling Sivoia Motorized Shades
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Sivoia Motorized Shade level refers to the position of the shades. The zone may be sent to a preset level or
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raised/lowered. Sivoia Motorized Shades zones may only accept Presets 1-4, ALLUP, or ALLDOWN. The raise/
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lower operation behaves the same as that of a Lights zone, however, the timeout period is 150 seconds, instead
of 5 seconds.
Controlling Contact Closures
Contact Closure zones only respond 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
General
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, Sivoia Motorized Shades, Contact
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Closures, or Unassigned. There are a total of 10 zones available on the RadioTouch RS232 Interface,
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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.
RadioTouch Setup Guide for RTA-RS232 17
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