RS232 connections to all Plus projectors

Plus projector families: (Code 40 hex) Plus U5, U7 (not U6xxx or Taxan)

See master Plus code list at: http://www.plus-america.com/pdf/PC_Control_RS232.pdf

Channel codes are:
Computer1	:= '#SR' + 0D + 0A;	// RGB 1	VGA analog-RGB
Computer2	:= '#SA' + 0D + 0A;	// RGB 2	VGA analog-RGB2 on U7 only, DVI on some
Computer3	:= '#SN' + 0D + 0A;	// Network on U7 only
Video1	:= '#SV' + 0D + 0A;	// Comp Video
Video2	:= '#SS' + 0D + 0A;	// S-Video
Video3	:= '#SN' + 0D + 0A;	// Network on U7 only

Any one of these codes can be set into Constant:0/Constant:1 for computer codes and Constant:2/Constant:3 for video codes. (The default is to have Computer1 (above) as the “Computer” channel and Video1 as the “Video” channel. Setting OPT1 switch ON will swap Video1 and Video2 channels, making S-Video the video default.)

•OPT7 handshake mode and power on panel connection blink codes available;

•Turn off the auto-source feature.

RS232 connections to (all) Plus projectors

U2 and U4 use a short cable with a 9-pin-D9 female one end and a 4-pin USB-style on the other. This cable is supplied by PLUS, and the hole to plug it in is very small, on the rear terminal panel covered with a stick-on silver plastic film.

U5 has a standard D9 male connector on the rear. U7 has 9-pin mini-DIN. Connections are the same for all four ranges.

Function/Direction	T440	Plus “Control”
	“projector”	Port Connector
	Connection	9-pin D-sub

Ground	Ground	9-pin D-sub pin 5

Data from T440 to projector	Tx	9-pin D-sub pin 3
		(RXD)
Reply data from projector to T440	Rx	9-pin D-sub pin 2
		(TXD)

Plus 9 volt CTS/DTR to projector	N/C	N/C

Plus “Control” Port Connector mini-DIN 9 pin

9pin mini-DIN Pin 4

9-pin mini-DIN, Pin 1 (RXD)

9-pin mini-DIN, Pin 7 (TXD)

N/C

3 4 5 6

7 8 9

Mini-DIN 9 solder side

After installation wiring of any projector to a T440, use a multimeter to check voltages of –9 on BOTH TX and RX pins in any installation, as described in the troubleshooting part of this manual.

Baud rate change

This family of projectors can be operated at 115,200 baud or 19,200 baud. As shipped from Plus, communications is at

115,200 baud, and must be set using a PC to 19,200 for use with a T440. Switch to 19,200 as follows:

Connect to a PC via a straight-though serial cable and run HyperTerminal, setting it up to run at 115,200 baud, 8 bit data, 1 start, 1 stop, no parity, no hardware handshake (8N1). (Unless you have enabled “local echo”, you will not see the characters as you type them. You can enable echo by going to File->Properties->Settings->ASCIISetup and ticking Echo typed characters locally.) HyperTerminal is found under Accessories in the Windows system.

Verify communications by typing #QS(CR)(LF) (The “QS” must be upper case. The CR and LF must follow. Send a CR with the ENTER key, and send the LF by holding down CTRL and pressing ENTER.) The projector should reply with its status, eg #QS2 if OFF, and #QS6 if warmed up and running. If, OFF, the projector can be turned ON with the #P1(CR)(LF) command. (The character after the P is a numeric 1.)

Now set it to 19,200 baud by sending a command #CL(CR)(LF) from a PC running HyperTerminal at 115,200 baud. (It will switch immediately, so the reply will be gibberish.)

Now terminate the HyperTerminal session at 115,200 baud and restart it at 19200 baud, (8N1, no handshake, local echo enabled). Type #QS(CR)(LF) and verify status reply at 19,200 baud. A #P0(CR)(LF) command powers down the U5. (The character after the P is a numeric 0.) (The U5 can be reset to 115,200 baud with a #CH(CR)(LF) command.)

The baud rate is held in projector non-volatile memory, so the baud rate setting to 19,200 need be done only once. (These commands are in Release N of the PLUS manual. Make sure the projector software is up-to-date).

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