Epson TM-H5000II series User Manual

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TM-H5000
II
IIII
II
series
Specification
(STANDARD)
2.1.2.7 Reception of status from the printer through the bidirectional parallel interface
In the bidirectional parallel interface specifications, the printer status transmission is available by
using the both-way communication facility in the Nibble/Byte Modes in accordance with the IEEE
1284.
In this case, different from in the RS-232 serial interface specifications, the real-time
interruptions from the printer to the host are disabled and thus precautions must be taken to the
followings.
1) Allowable capacity of the printer internal buffer is 99 bytes (except ASB status). The status
signals exceeding this capacity will be discarded. To prevent possible loss of status, the
host shall be ready for data acception (Reverse Mode).
2) When ASB is used, the host is preferably in the wait state for data acception (Reverse Idle
Mode). When this state is not available, the host shall enter the Reverse Mode to always
monitor the presence of data.
3) When ASB is used, preference shall be given to the ASB status for transmission over the
other status signals. Any accumulated ASB status signals left for transmission from the last
to the newest ASB status transmission shall be transmitted together at a time as one ASB
status showing the presence of change, followed by the latest ASB status.
Example: In the normal (wait) state, the ASB status is configured as follows.
First Status Second Status Third Status Fourth Status
0001 0000 0000 0000 0110 0000 0000 1111
When a sequence of operations are proceeded, the near end is detected
and the printer cover is opened, then the printer cover is closed, the
following pieces of data are accumulated.
First Status Second Status Third Status Fourth Status
¬
0001 0000 0000 0000 0110 0011 0000 1111
Near end detection
-
0011 1000 0000 0000 0110 0011 0000 1111
The printer cover is
opended.
®
0001 0000 0000 0000 0110 0011 0000 1111
The printer cover is
closed.
When the ASB status is received following this, a total of eight (8) bytes of
ASB will be transmitted as follows.
Accumulated ASB (①+②+③)
First Status Second Status Third Status Fourth Status
Accumulated ASB(①+②+③)
0011 0000 0000 0000 0110 0011 0000 1111
+
First Status Second Status Third Status Fourth Status
The latest ASB (③)
0001 0000 0000 0000 0110 0011 0000 1111
Fourth Status

Epson TM-H5000II series Specifications

General

Brand	Epson
Model	TM-H5000II series
Category	Printer
Language	English