Control panel module responses

Serial Communications, cont’d

When a command is valid, the module performs the command and sends the following response:

[R0 {address} {echo of the command sent}]

When a command is invalid, either because the command is not recognized or contains invalid parameters, the module sends the following response:

[R1 {address} {echo of the command sent}]

Using the command/response table

The command/response table begins on page 4-13. Upper or lower case letters are acceptable in the command field. The table below shows the hexadecimal equivalent of each ASCII command.

ASCII to HEX Conversion Table

	Symbols
=	Line feed
X1 =	Address number 00 - 98 (00 addresses all units but individual units do

not respond, 97 is the factory-installed default).

The very first command that you send to the control panel module must be the connect, [CC X1 ], command, where X1 is the module’s address. The control panel module will not accept other commands or respond until it has been addressed.

The very last command that you send to the control panel module should be the connect, [CC X1 ], command, where X1 is a different address. This prevents the control panel module from accepting and responding to commands for other devices.

X2 = Button number and string (primary or secondary) (figure 4-8)

Buttons 1 and 5 are closest to the top of the CTL208. Orient the CTL208 so that the text on the rear of the unit is right-side up to determine the top of the module.

Symbols, defined starting on page 4-11, are used throughout the table to represent variables in the command/response fields. Command and response examples are shown throughout the table.

Button	Button
number	number
1	5
2	6
3	7
4	8

Figure 4-8 — Button numbers

X2 s must be 2-digit numbers.

X2 # Button/string	X2 # Button/string
01 = 1/primary	11 = 1/secondary
02 = 2/primary	12 = 2/secondary
03 = 3/primary	13 = 3/secondary
04 = 4/primary	14 = 4/secondary
05 = 5/primary	15 = 5/secondary
06 = 6/primary	16 = 6/secondary
07 = 7/primary	17 = 7/secondary
08 = 8/primary	18 = 8/secondary

X3 =	ASCII button code	Up to 128 alphanumeric characters.
		If you need to use the bracket delimiters in a stored
		ASCII command, you need to use the insert
		brackets feature. Under this feature, one character
		replaces the left bracket ( [ ) and another character
		replaces the right bracket ( ] ). The default values
		are a single quote mark ( ‘ ) in place of the left
		bracket and a double quote ( “ ) in place of the right
		bracket. The CTL208 replaces the characters with
		the bracket delimiters in the stored ASCII or hex
		command string.
X4 =	Bracket position	1 = left bracket, 2 = right bracket.

4-10 CTL208CM Control Panel Module • Serial Communications

CTL208CM Control Panel Module • Serial Communications 4-11

CTL208CM specifications

The Extron CTL 208 CM is a sophisticated control system designed for seamless integration and management of AV systems in various environments, such as educational institutions, corporate spaces, and any setting requiring robust audiovisual control. Known for its user-friendly interface and advanced features, the CTL 208 CM stands out in its category.

One of the primary features of the CTL 208 CM is its ability to control multiple AV devices through a single platform. This centralized control facilitates ease of operation for users, allowing them to manage projectors, displays, sound systems, and other devices without the need to juggle multiple remotes or interfaces. This is particularly beneficial in environments where educators or presenters need to focus on delivering their content without getting bogged down by technicalities.

The CTL 208 CM is equipped with Extron’s proprietary technologies, which enhance its performance and reliability. Notable among these is the Extron Control App, which allows users to create custom controls via a tablet or smartphone. This not only streamlines the user experience but also enables personalized settings, ensuring users can quickly access the devices they need.

Additionally, the CTL 208 CM features customizable button layouts and a graphic interface that simplifies operation, regardless of the user's technical proficiency. This flexibility is crucial in environments where users may vary significantly in their comfort level with technology.

The system's advanced communication capabilities enable it to integrate seamlessly with a variety of third-party devices, expanding its functionality and compatibility. This open architecture design supports popular protocols such as RS-232, IP control, and infrared, allowing users to implement it alongside existing infrastructures effectively.

Moreover, the CTL 208 CM boasts a scalable architecture, making it suitable for small to large installations. Users can easily expand their control system as their needs evolve without requiring a complete overhaul of their existing setup.

In summary, the Extron CTL 208 CM is a powerful control solution that combines ease of use with extensive functionality. Its advanced technologies and features position it as an ideal choice for anyone seeking a reliable and versatile AV control system. With its ability to simplify AV management and enhance user engagement, the CTL 208 CM is a valuable asset for modern audiovisual environments.

Serial Communications, cont’d