Extron electronic CTL208CM Serial Commands, Using the help system, Communication protocols

Serial Communications, cont’d

Buttons must be set to operate in toggle mode to assign groups.

Groups cannot be assigned to buttons that are set to operate in toggle mode and are assigned a timeout value.

11. When all of the desired programming changes are made, click the Program button at the bottom of the window to send all of the programming entries to the control panel module.

End the session by selecting a different address than the one assigned to the CTL208. This prevents the module from responding to commands meant for another unit.

12. Click Inline Model > Select Address. The Addresses window (figure 4-2) appears.

13. Click and drag on the slider or click the scroll up ( ) or down () button until an address other than the CTL208’s address is visible.

14. Click on the desired address.

15. Click Ok.

16. If necessary, reconfigure the comm port.

The communications protocols of the control panel module should match the optimum protocols of the device to be controlled.

17. If you need to change serial port settings to match the serial communication protocol of the device to be controlled, click Communications > Comm Port > Comm 1 (or the correct Comm port). The Serial Port Setup window appears (figure 4-3).

a.	Select the desired settings by clicking in the
	appropriate radio buttons.
b.	Click Ok.

18. Click the in the upper right corner of the startup window to exit the program.

Using the help system

For information about program features, you can access the help program in the following ways:

•From within the ICS100 startup window, click on the Help entry on the task bar.

•From within the Button Codes window, press the F1 key.

Serial Commands

Communication protocols

The control panel module’s serial port is factory-configured to 9600 baud, no parity, no flow control, half-duplex mode.

If you change the serial protocols, communications between the computer and the control panel module are lost until the computer is updated to match the new control panel module settings.

The communications protocols of the control panel module should match the protocols of the device to be controlled.

Command and response structure

Valid commands consist of a leading delimiter, one or more characters in a command code, and an ending delimiter. The control panel module’s response to an RS-232 command also consists of a leading delimiter, a command code, and an ending delimiter.

The control panel module’s leading delimiter code is always a left bracket ( [ ). The ending delimiter code is always a right bracket ( ] ).

Example: [CPp@] — where “[“ is the leading code, “CPp@” is the command (reset the serial port to default values), and “]” is the ending code.

Addressing the unit

The control panel module must be addressed before it will accept and respond to commands. The address packet ([CC##], where ## is the 2-digit address ) routes setup information to a particular unit on a network and enables command responses. Once the control panel module is addressed, it can accept an unlimited number of commands. If a different unit is addressed, the CTL208 ignores subsequent commands until addressed again.

The factory-installed default address is 97, but this number can be changed. The control panel module can also take commands after receiving a broadcast address of 00, but it will not send responses. Broadcast is for multiple units on an RS-485 serial line in half duplex mode.

After you are finished programming the control panel module, always terminate the session by sending an address packet to another unit with a different address. This prevents the module from responding to commands meant for another unit.

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