Extron electronic SW AV manual Switcher-initiated messages, Error responses, Timeout

Page 37

Switcher-initiated messages

When a local event occurs, such as a front panel operation, loss or restoration of an input signal, or an error condition, the switcher responds by sending a message to the host. The switcher-initiated messages are listed below:

(C) Copyright 2002, Extron Electronics, SW AV Series, Vx.xx Cn

The switcher issues the copyright message and input selected message when it first powers on. Vx.xx is the firmware version number. Cn identifies the currently selected input, where n is the input number (input 1 is the power-up default in normal mode). The switcher also sends the Cn message whenever the selected input is changed using the front panel buttons.

Sig n n n n n n

A video switcher initiates this message when there is a change in the status of a video input. Each n indicates an input (1 through last, from left to right). n = 1 indicates video signal present, n = 0 indicates video signal not preset. There are as many ns in the switcher-initiated message as the maximum number of inputs for the models (4, 6, 8, or 12).

Reconfig

The switcher initiates the Reconfig message when there is a change in an audio model’s audio gain setting.

Error responses

When the switcher receives a valid SIS command, it executes the command and sends a response to the host device. If the switcher is unable to execute the command because the command is invalid or it contains invalid parameters, the switcher returns an error response to the host. The error response codes are:

E01 – Invalid input channel number (out of range)

E10 – Invalid command

E13 – Invalid parameter (out of range)

E14 – Illegal command for this configuration

Timeout

Pauses of 10 seconds or longer between command ASCII characters result in a timeout. The command operation is aborted with no other indication.

Using the command/response table

The command/response table is on the next page. Symbols are used throughout the table to represent variables in the command/ response fields. Command and response examples are shown throughout the table. The ASCII to HEX conversion table at right is for use with the command/ response table.

ASCII to HEX Conversion Table

Space

SW AV Series Switchers • Remote Control 4-3

Image 37

Contents SW AV Series Precautions SW AV Series Switchers Quick Start QS-1 Quick Start SW AV Series SwitchersQuick Start SW AV Series Switchers, cont’d Table of Contents Table of Contents, cont’d One Features About the SwitchersVideo switchers Introductiontroduction, cont’dInputs Outputs Model Captive SW AV Series Switchers IntroductionVideo Screw Audio All video modelsCaptive screw connector a models Audio switchersRCA connector a RCA models All audio modelsAll switcher models Introduction, cont’d Two Installation Overview Installationstallation, cont’dMounting the Switcher Cabling and Rear Panel Views Mounting the switcherVideo input and output connections video models only Installation, cont’dAudio input and output connections audio models only Captive screw connector wiring for audio inputs External sync connection Remote connectionSimple external sync connection example Power connectionInstallation, cont’d Three SW AV Series Switchers Operation Front Panel Controls and IndicatorsOperationeration, cont’d SW 8A front panel Operation, cont’d Input selection controls and indicatorsAutoswitch mode controls and indicator video switchers Audio controls and indicators audio switchersPower Executive mode controls and indicatorSwitching inputs Front Panel OperationsExample 1 Select an input Example 2 Select a video input only video and audio switcherVideo switchers must be in normal mode Adjusting audio gain and attenuation audio switchersNot increment or decrement the audio level Example 4 Adjust the audio levelExample 4, step E Adjusting the audio level Audio level reset single input Switch modeAudio level reset all inputs Executive mode front panel security lockout Optimizing the Audio Audio SwitchersMemory Troubleshooting If no Image Appears Operation, cont’d Four SW AV Series Switchers Remote Control Host-to-switcher communicationsRemoteControl,cont’d Simple Instruction Set ControlError responses Switcher-initiated messagesTimeout Using the command/response tableSymbol definitions Remote Control, cont’dCommand Ascii Command Response Additional description Resets Using the software Installing the softwareWindows-Based Program Control Using the help system Infrared Remote ControlContact Closure Control SW 4 and SW 6 Models Only Remote Control, cont’d AAppendix a Specifications and Part NumbersSW AV Series Switchers Specifications and Part Numbers Specificationsecifications, cont’dAudio Control/remote switcher Specifications, cont’dSwitcher Optional accessoriesCables Extron PartBulk cables Super High Resolution Cable Super High Resolution CableFCC Class a Notice Extron’s Warranty Extron Electronics, USA