Rice Lake TM-U590 User Manual

Serial Commands

The TM-U295 and TM-U590 support the following serial commands. Release of Ticket: (End of serial string/LF before ESC)

ASCII: ESC q Decimal: 27 113

Sensor Disable: (Hold in buffer/Print when ticket is inserted)

ASCII: ESC c 40

Upside Down Print: (Start of serial string)

ASCII: ESC { 1 Decimal: 27 123 49

Height/Width Commands: For double high/double wide (start of serial

command). Please note, other characters in last

position result in different heights. ASCII: ESC ! _ Decimal: 27 33 96

Communica t ions Int erface Information

for

Epson

Ticket and T ape Printers

TM-295

Power Supply Connections

The power supply connector is used to connect the printer to the external power source. Pin numbering for the power supply connector is shown in the figure and table below.

Power Supply

Connector

Check out our web site, www.rlws.com, for this manual and other service-related information on our products.

Technical training seminars are available through Rice Lake Weighing Systems.

Course descriptions and dates can be viewed at www.rlws.com or obtained by calling

715-234-9171 and asking for the training department.

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TM-U200 TM-U590

36852

This document provides communications interface information not included

TXD RXD

DSR CTS DTR

Host

Computer

Printer

3 2

TXD

RXD

DSR

DTR

in the manuals supplied with the TM-295 Ticket Printer, TM-U200 Tape Printer and TM-590 Ticket Printer. Please keep this information with the manual for your printer.

Communications Specifications

Data transmission: Serial (RS-232C–compatible) Synchronization: Asynchronous Handshaking: DTR/DSR or XON/XOFF control Signal level: MARK (–3 to –15V, logical “1”)

SPACE (+3 to +15V, logical “0”)

Baud rates: TM-295: 1200, 2400, 4800, 9600 bps

Data length: 7 or 8 bits Parity: None, even, or odd Stop bits: 1 or more Serial connector: D-SUB25 female connector or equivalent

TM-U200: 4800 or 9600 bps TM-U590: 2400, 4800, 9600, 19200

Serial Port Connections

The following figure shows the pin numbering scheme for the serial port:

DSR/DTR Handshaking

The DSR/DTR handshaking uses pins 6 and 20 to signal availability of the printer and host computer to receive data:

DSR (pin 6) indicates whether the HOST COMPUTER is ready to receive data:

SPACE (logical 0): Host computer is ready to receive data MARK (logical 1): Host computer is

not

ready to receive data

DTR (pin 20) indicates whether the PRINTER is ready to receive data:

SPACE (logical 0): Printer is ready to receive data MARK (logical 1): Printer is

not

ready to receive data

DTR is set to MARK (logical 1) during power-up, self-test, and error states, or when the receive buffer is full.

NOTE: DSR/DTR handshaking cannot be used if pin 6 is used as a reset signal input.

XON/XOFF Handshaking

When XON/XOFF handshaking is selected, the printer transmits XON/XOFF characters as follows:

XON (<11>H) is sent whenever the printer goes online or when the receive buffer is

released from the buffer-full state.

XOFF (<13>H) is sent whenever the printer goes offline, the receive buffer is full, or

when an error state exists.

XON/XOFF handshaking ignores DSR input signals (pin 6). The DTR output (pin

20) is always held to SPACE (logical 0) except during power-up, self-test, and error states.

Pin assignments for the serial port connector are as follows:

12/02

Serial Port Connector

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Sample Serial Connection

The following figure shows an example of connections made between a host computer (configured as the DTE) and a printer.