closed switch would ground the input, and a closed switch would normally be considered active.

This command affects the operation of the LIA, LID, and LIH commands. If a logic input pin's polarity is reversed, the operation of these commands is reversed.

By default, the polarity for all pins is set to normal (active low).

This command is saved to global non-volatile memory and is not part of a preset. Its value is saved each time it is changed. It will retain its value after power-down. Since this command writes to non- volatile memory, there will be a delay before an acknowledgment is returned.

Example

S01LIP000000000000000000001111

Description

Status Message

Set logic inputs 1- 20 to normal (active low) and

logic inputs 21- S01LIP000000000000000000001111 24 to inverted

(active high).

8.85. LO -- Query or Set Status of Logic Output Pins

This command sets or queries the current state of the logic outputs. There are 20 logic outputs, so an array of 20 boolean values is required or returned, with the first value indicating the state of the first logic output, the second value indicating the state of the second logic output, and so on.

If a logic output pin has conditions driving it (via the LOA and LOD commands), those conditions will override any settings imposed by the LO command.

If a logic pin is masked via the LOM command, its status will still be affected by the LO command.

ExampleDescription

Set all logic S01LO*00000000000000000000 outputs low.

Set even numbered logic output pins low

S01LO*10101010101010101010 and odd numbered logic output pins high.

Query current

S01LO*?state of logic outputs

Status Message

S01LO*00000000000000000000

S01LO*10101010101010101010

S01LO*abcdefghijklmnopqrst , where a- t are each 0 or 1 depending on the current state of the corresponding logic output.

8.86. LOA -- Define Behavior for Logic Output Activated

Page 76 Page 78
Page 77
Image 77
Polycom RS-232 manual LO -- Query or Set Status of Logic Output Pins, LOA -- Define Behavior for Logic Output Activated
Page 76 Page 78

RS-232 specifications

Polycom RS-232 is a key interface utilized in various communication and audiovisual systems, enabling effective integration between different devices. This technology employs a standard serial communication protocol that allows for robust control and communication, particularly in environments that require sophisticated audiovisual setups.

One of the main features of Polycom RS-232 is its ability to facilitate point-to-point communication over distances of up to 50 feet without the need for a repeater. This long-range connectivity is essential in large conference rooms and auditoriums where devices are often spread out over considerable distances. The serial connection is often more reliable than wireless options, which can be susceptible to interference.

Another notable characteristic is its versatile compatibility with a range of devices, including cameras, projectors, and interface panels. This allows users to control multiple devices from a single point, streamlining the operation of complex setups. The straightforward nature of RS-232 commands simplifies integration, which is a significant benefit for both installers and end-users.

Polycom RS-232 also supports various baud rates, giving users the flexibility to optimize communication speed based on their requirements. This adaptability ensures that users can achieve the desired performance, whether they are managing basic functions like power and volume control or more complex commands for switching video sources or adjusting settings.

The technology also features error-checking capabilities, which contribute to its reliability in communication. This reduces the likelihood of issues during operations, ensuring that commands are correctly received and executed. Additionally, its structured protocol aids in diagnosing and troubleshooting, making it easier to manage any issues that arise.

With its robust nature and proven reliability, Polycom RS-232 remains a pivotal technology in the realm of audiovisual communications. Its combination of long-range capabilities, compatibility, flexibility, and reliability makes it an essential tool for enhancing the efficiency of modern communication environments. As technology continues to evolve, the importance of dependable interfaces like Polycom RS-232 cannot be overstated, ensuring seamless integration and operation of sophisticated communication systems. Whether used in educational institutions, corporate environments, or event venues, Polycom RS-232 guarantees a streamlined experience in device management and control.
Top Page Image Contents