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Polycom RS-232 manual Lien -- Enable Automatic Logic Input Status Messages

Models: RS-232

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MACROQ command. Since up to 256 commands can be stored in each macro, this gives the effect of

having up to 256 commands execute when the logic pin changes state. The command associated with the state change can also be a PRESETX or PRESETQ. This makes it easy to reconfigure the device for

different rooms based on external logic settings.

The BROADA is also useful in logic pin assignments. The BROADA command transmits a command to

another device on the EF Bus, so you can effectively make a logic pin state change on one device cause an action to occur on another device.

ERROR#074 will be generated if the assigned command is one that writes non-volatile memory, and the pin will not actually be assigned.

See the description of the LIA for examples on how to use the LIH command. The syntax for this

command is exactly the same. One additional example is given here: using the LIH command for volume control.

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

Description

Status Message

Assign the command GAINIA>3 to occur repeatedly when logic pin 8 is held in the active state. The

S01LIH8,GAINIA>3 GAINIA>3 command causes the gain on input channel S01LIH8,GAINIA>3

A to increase by 3 dB each time the command is executed.

8.79.LIEN -- Enable Automatic Logic Input Status Messages

This command controls whether or not logic input status messages are sent automatically. If LIEN is enabled, then a logic input query (LI*?) is performed any time any of the states change on the logic input pins. For example, if all logic inputs are currently in the low state ('0') and LIEN is enabled, then if logic input 12 changes state to '1', the following status message will be generated:

S01LI*000000000001000000000000

A status message is only generated if there is a state change. This helps keep data traffic to a minimum.

This command is a boolean command. See Section 6.1 for more information on this type of command.

This command is saved to non-volatile memory only as part of a preset. The state of this command will be restored after power-up only if a preset is saved and that preset is set to be the power-on preset.

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Polycom RS-232 Lien -- Enable Automatic Logic Input Status Messages, To increase by 3 dB each time the command is executed
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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.