Specifications

ManualsBrandsEpson ManualsComputer equipmentU590P - TM B/W Dot-matrix Printer

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TM-U590 series

Specification

(STANDARD)

Table 2.1.1 TM-U590 series Printer Status and Signals (Continued)

Pin number Signal name Signal direction Function

2) When XON/XOFF control is selected:

The signal indicates whether the printer is correctly

connected and is ready to receive data. SPACE

indicates that the printer is ready to receive data. The

signal is always SPACE except in the following cases:

• During the period from when the power is turned on

to when the printer is ready to receive data

• During the self-test

25 INIT Input Changing the DIP switch setting enables this signal to be

used as a reset signal for the printer.

The printer is reset when the signal remains SPACE for

1 ms or more.

(*1) • When the remaining space in the receive buffer drops to 16 bytes, the printer status becomes

"buffer full" and it remains "buffer full" until the space in the receive buffer increases to 26

bytes.

• The printer ignores the data received when the remaining space in the receive buffer

is 0 bytes.

2.1.1.4 XON/XOFF transmit timing

When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows.

Transmit timing differs depending on the DIP SW2-1 setting.

Table 2.1.2 XON/XOFF Transmit Timing

DIP SW 2-1 status

Printer status ON OFF

XON transmission

① When the printer goes online after turning on the power

(or reset using interface)

Transmit Transmit

② When the receive buffer is released from the buffer

full state

Transmit Transmit

③ When the printer switches from offline to online

— Transmit

④ When the printer recovers from an error using the

DLE ENQ 1 or DLE ENQ 2 commands

— Transmit

XOFF Transmission

⑤ When the receive buffer becomes full

Transmit Transmit

⑥ When the printer switches from online to offline

— Transmit

NOTES: • The XON code is <11>H and the XOFF code is <13>H.

• In case ②, XON is not transmitted when the

• In case ③, XON is not transmitted when the receive buffer is full.

• In case ⑥, XOFF is not transmitted when the receive buffer is full.