Epson TM-U950 Technical Manual page 31

CONFIDENTIAL
Parity (*)
Number of stop bits
Connector type
(*)Can be set with DIP switches on the bottom of the unit (See Tables 1-9 and 1-10.)
On-line/off-line switching
This printer has no on-line/off-line switch. It automatically goes off-line in the following cases:
During self-test.
When the cover is open.
When the paper feed button (receipt or journal/slip) is used to advance the paper.
When printing has stopped due to no paper ("no paper" condition selected with ESC c 4).
During the interval between power-on (including reset using the interface) and the end of
the initialization sequence, until data can be received.
When an error has occurred
During the macro execution switch waiting status.
Table 1-7. Interface Connector Specifications and Functions
Pin number
1
2
3
4
6
7
1-20 Features and General Specifications
None, even, odd
1 or more
D-SUB 25 female or equivalent
Signal name I/O Function
FG — Frame ground
TXD O Transmit data
RXD I Receive data
DIP SW1-6 off: Same as DTR signal (Pin20)
RTS O DIP SW1-6 on: Logical product of DTR signals of DM-D and TM (if both are
SPACE, the printer can receive data.
Indicates whether the host is ready to receive data. SPACE indicates
"ready," and MARK indicates "not ready." If DTR/DSR control is used, the
printer checks this signal before sending data (except when sending
DSR I data by GS ENG, DLE ENQ, GS a). If XON/OFF control is used, this signal is
not checked.This signal can be used to reset the printer according the
DIP switch settings. The printer is reset when the signal is MARK with more
than 1 ms pulse width.
SG — Signal ground
Rev. A