Extron electronic TSC 100 user manual Device-initiated messages, Error responses

Serial Control, cont’d

Programmer’s Guide for Serial Communication

The TSC 100 can be controlled by a host computer or other control device via an RS-232/422 connection with the following protocol:

•9600 baud

•1 stop bit

•no parity

•no flow control

The control device can use either Extron’s Simple Instruction

Set™ (SIS™) or the Extron graphical control program for

Windows®.

The rear panel RS-232 9-pin D connector has the following pin assignments:

5	1	Pin	RS-232	Description	RS-422 Description
		1	—	—	—	—
9	6	2	Tx	Transmit data	Tx-	Transmit data (-)
		3	Rx	Receive data	Rx-	Receive data (-)
Female
		4	—	—	—	—
1	5
		5	Gnd	Signal ground	Gnd	Signal ground
		6	—	—	—	—
		7	—	—	Rx+	Receive data (+)
6	9	8	—	—	Tx+	Transmit data (+)
	Male	9	—	—	—	—

SIS commands consist of one or more characters per field. No special characters are required to begin or end a command sequence. When the TSC 100 determines that a command is valid, it executes the command and sends a response to the host device. All responses from the TSC 100 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 messages

When a local event such as an input selection occurs, the TSC 100 responds by sending a message to the host. No response is required from the host. The device-initiated message is shown below (underlined).

(C)COPYRIGHT 2002, EXTRON ELECTRONICS TSC 100, Vx.xx

The device displays the copyright message when it first powers on. Vx.xx is the firmware version number.

Error responses

When the TSC 100 receives a valid SIS command, it executes the command and sends a response to the host device. If the device is unable to execute the command because the command is invalid or contains invalid parameters, it returns an error response to the host. The error response codes and their descriptions are as follows:

E01 — Invalid input channel number (too large)

E09 — Invalid function number (too large)

E10 — Invalid command

E13 — Invalid value (out of range)

Using the command/response table

The table on page 3-4 lists the commands that the switcher recognizes as valid, the responses that are returned to the host, a description of the command’s function or the results of executing the command, and an example of each command. Lower case characters are acceptable in the command field only where indicated.

Symbol definitions are shown at the beginning of the table. An ASCII to HEX conversion table is provided in figure 6.

ASCII to HEX Conversion Table

•

Figure 6 — ASCII-to-HEX conversion table

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