Epson TM-U200 Series, Technical Manual

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Rev. A Features and General Specifications 1-23
TM-U200 Series (Type A/AM) Technical Manual
C o n fid e n tia l
When ASB status is received following this, a total of eight (8) bytes of ASB will be transmitted
as follows: Accumulated ASB (
➀
+
➁
+
➂
).
Notes on setting DIP switch 1-8 to ON
The printer mechanism stops but does not become busy when an error occurs, printing stops for
a paper end, or paper is fed using the
FEED button.
When setting DIP switch 1-8 to ON to enable handshaking with the printer, be sure to check the
printer status with
GS a and 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.
When using DLE EOT and DLE ENQ , be sure that the receive buffer does not become full.
❏
If the host cannot transmit data when the printer is busy or if an error occurs, DLE EOT and
DLE ENQ cannot be used when printer is busy because the receive buffer has become full.
❏
With a host that can transmit data when the printer is busy, if the printer’s receive buffer
becomes full while the host is sending bit-image data, a
DLE EOT or DLE ENQ command
transmitted during sending of bit-image data is processed as bit-image data, not as a
command. Secondly, any data transmitted when the receive buffer is full may be lost.
Example: Check printer status using GS r after transmitting each line of data and use the 1KB
receive buffer. Transmit one line of data so that the receive buffer does not become full.
First Status Second Status Third Status Fourth Status
Accumulated ASB (¿
+
¡
+
¬) 0101 1000 0000 0000 0000 0011 0000 0000
+ First Status Second Status Third Status Fourth Status
The latest ASB (¬)
Fourth Status 0001 0000 0000 0000 0000 0011 0000 0000