ADDRESSING Having received the ETX or XOFF character, then the STX or XON character, the next character received is the address of the unit that is to receive data. There are 32 possible addresses, from code 30 to code 4F hex. These correspond to addresses set up on the DIP switch jumper on the card. Units with the address, “0” ASCII 30 hex, will display all data, including the address code sent, and this address will cause any unit to receive data. Handshake: No handshake required–accepts continuous data.

PROTOCOLS The following serial ASCII protocols are jumper switch selectable: Mode 0: Each printable character as it is received is placed in the least significant position and all characters are shifted left one position. Following a carriage return character, the next valid character received causes the display to clear and that character is placed in the least significant position (if it is a printable character). Mode 1: Printable characters are placed in a buffer on reception. Receipt of the carriage return character causes the buffer contents to be transferred to the display. Mode 2: 269 Temperature Meter display–display is updated on reception of the carriage return character. When the transmitting meter is measuring temperatures, the remote display repeats the four characters shown on the 269, followed by degrees C or degrees F. When the transmitting 269 is indicating millivolts, the remote display repeats the four characters in the middle four positions, and negative indication is in the left hand position. Overload indication is with E’s. Mode 3: P6000 Universal Counter (without units of measurement) Display is updated on reception of the carriage return character. The display repeats the 6 characters shown on the P5000. The P5000 must be configured to transmit a 9 character message, not a 12 character message.

Recognized Codes–Other Codes Ignored

ASCII Code	Keyboard Character	Action
03	Ctrl C	EXT: stops the display from listening to further data except code 02
13	Ctrl S	XOFF: same as ETX
02	Ctrl B	STX: starts the display listening to data. If the instrument has an address other than 0 the next character must be the address of the instrument or a 0 or it will return to not listening
11	Ctrl Q	XON: same as STX
0C	Ctrl L	Causes the display to clear blank
0D	Ctrl M or Enter	End of data; in shift mode, next valid data will clear the display and insert character into least significant position. In strobed mode, transfers last string to the display.
20	Space	Inserts a space
2B	+	Inserts a space
2D	-	Inserts a ‘–’ sign
2E	.	Adds a decimal point to the last character entered
1B	Esc	Resets display to its power-on condition
30-5F		Inserts characters shown above: character is entered in the least significant place and all characters are shifted to the left. In strobed mode the data is placed in a register than than the display.