Extron electronic DDS 402 manual Host-to-Scaler Instructions, Scaler Error Responses

Host-to-Scaler Instructions

The scaler accepts SIS (Simple Instruction Set) commands through the

Remote 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 scaler 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.

Scaler Error Responses

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

E01 — Invalid input channel number (too large)

E10 — Invalid command

E11 — Invalid preset number (too large)

E13 — Invalid value (out of range)

E17 — Illegal command for this signal type

Using the Command/Response Table

The command/response table begins on the next page. Except for the horizontal and vertical filter settings, upper or lower case letters are acceptable in the command field. The table below shows the hexadecimal equivalent of each ASCII command. Symbols, defined on page 4-2, are used throughout the table to represent variables in the command/response fields. Command and response examples are shown throughout the table.

ASCII to HEX Conversion Table

Space

With the exception of the horizontal and vertical filtering (D and d) commands, the SIS commands are not case sensitive.

Digital Display Scaler • Programmer’s Guide 4-5