Notes On Setting Dip Switch 2-5 To On; Notes On Resetting The Printer Using The Interface - Epson TM-U925 Manual

2.1.2 Notes on setting DIP switch 2-5 to ON

1) The printer mechanism stops but does not become busy when an error occurs, the cover is open,
printing stops due to a paper-end, or paper is fed using the PAPER FEED button.
2) When setting DIP switch 2-5 to ON to enable handshaking with the printer, be sure to check the
printer status using the GS a command and the ASB function. In this setting, the default value of n
for GS a is 2. The printer automatically transmits the printer status, depending on on-line/off-line
changes.
3) When using DLE EOT, DLE ENQ, and GS ENQ, be sure that the receive buffer does not become full.
· When using a host that cannot transmit data when the printer is busy:
If an error occurs, DLE EOT, DLE ENQ, and GS ENQ cannot be used when the printer is busy due
to a receive buffer-full state.
· When using a host that can transmit data when the printer is busy:
If the receive buffer becomes full while transmitting bit-image data, a DLE EOT, DLE ENQ, or GS
ENQ command used while sending the bit-image data is processed as bit-image data. The data
transmitted when the receive buffer is full may be lost.
Example: Check the printer status using ESC v or ESC u after transmitting each line of data and
use the 2K byte receive buffer. Transmit one line of data so that the receive buffer
does not become full.

2.1.3 Notes on resetting the printer using the interface

The printer can be reset using interface pins 6 and 25 by changing the DIP switch setting (refer to
Section 3.3.3, DIP switch 2).
Signal Line
Pin 6 (DSR)
Pin 25 (INIT)
To reset the printer, the following requirements must be satisfied:
· DC characteristics:
Input HIGH voltage
Input LOW voltage
Input HIGH current:
Input LOW current:
Input impedance:
EPSON
Table 2.1.3 Reset Switching
DIP Switch
DSW 2-7: ON
DSW 2-8: ON
Table 2.1.4 Reset DC Characteristics
V +3 to +15 V
IH
V -15 to + -3 V
IL
I 5 mA (maximum)
IH
I -5.3 mA (maximum)
IL
R
IN
TITLE
TM-U925
Specification
(STANDARD)
Reset Condition
MARK level input
SPACE or TTL-HIGH level input
Pin 6 (DSR)
3 KW (minimum)
SHEET
REVISION
A
Pin 25 (INIT)
+2 to +15 V
-15 to + 0.8 V
1 mA (maximum)
-2 mA (maximum)
NO.
NEXT SHEET
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