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Simple Instruction Set Control
Host-to-Unit Instructions
SIS commands consist of one or more characters per field. No special characters are
required to begin or end a command character sequence. When a command is valid, the
transmitter executes the command and sends a response to the host device. All responses
from the transmitter to the host end 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.
Device-Initiated Power-Up Message
When the device completes its start‑up, it issues the following message to the host:
© Copyright 20yy, Extron FOX3 T 201 MM (SM), Vx.xx, 60‑nnnn‑nn
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NOTE: This message only displays if the FOX3 device is connected to the serial port.
Error Responses
When the transmitter receives a valid SIS command, it executes the command and sends a
response to the host device. If the transmitter is unable to execute the command because
the command is invalid or it contains invalid parameters, the transmitter returns an error
response to the host. The error response codes are:
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Timeout
Pauses of 10 seconds or longer between command ASCII characters result in a timeout.
The command operation is aborted with no other indication.
20yy is the copyright year
Vx.xx is the firmware version number
60‑nnnn‑nn is the part number.
E10 — Invalid command
E11 — Invalid preset number
E13 — Invalid parameter
E14 — Invalid for this configuration
E17 — Invalid command for signal type
E18 — System or command timed out
FOX3 T 201 Transmitter • SIS Configuration and Control
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E21 — Invalid room number
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E22 — Busy
E24 — Privilege violation
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E25 — Device not present
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E26 — Maximum number of connections
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exceeded
E28 — Bad file name or file not found
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]
),
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