Snell Switcher Output

This is an external plug-in used to control Snell devices that comply with the SW-P-08 protocol. It uses RS-485 cables. The COM port settings may vary for different devices.

The Snell switcher configuration window contains the following settings:

COM port– specify which COM port you would like to use for connecting to the switcher. All of the available COM ports are listed in this drop-down list.

Baud rate–set the information carrying capacity of the port measured in bits/s.

Parity  this is a method used for error-detection in transmission. When parity is used with a serial port, an extra data bit will be sent with each data character. The parity bit in each character can be set to:

[No Parity]  this means that no parity bit will be sent at all.

[Mark]  this means that the parity bit is always set to the mark signal condition (logical 1) and, likewise, the [Space] parity always sends the parity bit in the space signal condition. Aside from the uncommon applications that use the 9th (parity) bit for some form of addressing or special signalling, mark or space parity is uncommon, as it adds no error detection information.

[Odd] parity is more common than [Even], since it ensures that at least one state transition occurs in each character, which makes it more reliable.

The most common parity setting, however, is [No Parity], with error detection handled by a communication protocol.


NOTE: The settings, made into the COM port settings field of the Snell switcher configuration dialog have to correspond to the ones, made into the switcher itself.

NOTE: If you have more than one device, it is necessary to specify the Мax Matrix/Level value in the Device scan settings field, situated at the lower part of the dialog. Otherwise, they will not be discovered in Online mode.