Extron electronic ISM 824 manual Host-to-Switcher Instructions, Switcher Error Responses

Host-to-Switcher Instructions

The multiswitcher accepts SIS commands through its serial ports and/or its LAN port. SIS commands consist of one or more characters per command field. They do not require any special characters to begin or end the command character sequence. Each multiswitcher response to an SIS command ends with a carriage return and a line feed (CR/LF = ]), which signals the end of the response character string. A string is one or more characters.

Switcher Error Responses

When the ISM 824 receives an SIS command and determines that it is valid, it performs the command and sends a response to the host device. If the multiswitcher is unable to perform the command because the command is invalid or contains invalid parameters, the multiswitcher returns an error response to the host. The error response codes are:

E01 — Invalid input number

E09 — Invalid preset number

E12 — Invalid output number

E13 — Invalid parameter

E14 — Not valid for this configuration

E17 — Illegal command for this signal type

E22 — Busy

E24 — Privilege violation

E25 — Device not present

E26 — Maximum number of connections exceeded

E27 — Invalid event number

E28 — Bad filename/file not found

E30 — Hardware failure (followed by colon (:) and descriptor #

E31 — Attempt to break port pass-thru when not set

Using the Command/Response Tables

The command/response table begins on the next page. Except for the gain and attenuation settings and the filter settings, upper or lowercase letters are acceptable in the command field. The table below shows the hexadecimal equivalent of each ASCII command.

ASCII to HEX Conversion Table

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NWith the exception of the audio gain and attenuation (G and g) and horizontal and vertical filtering (D and d) commands, the SIS commands are not case sensitive.

ISM 824 Integration Scaling Multiswitcher • SIS™ Programming and Control 4-7