Rev. B
Features and General Specifications 1-21
TM-U200D/U200PD Technical Manual
Switching between on-line and off-line
The printer is not equipped with any on-line/off-line switch. The printer is placed into off-line
status in either of the followings:
❏
When the power is turned on or until the printer becomes ready for data transmission after it
is initialized by the reset signal (nInit) from the interface.
❏
In the process of self-test.
❏
In the process of paper feeding using the paper feed switch.
❏
Between the time when the printer stops printing due to a paper-end and when the on-line
recovery wait time finishes after loading paper. (in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt feature set enabled due to paper shortage by ESC c 4).
❏
When an error has occurred.
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.
❏
Allowable capacity of the printer internal buffer is 100 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).
❏
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.
❏
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 lastest ASB status.
Example: In the normal (wait) state, the ASB status is configured as follows:
When a sequence of operations are proceeded, the
PAPER FEED
button is pressed and released,
the following pieces of data are accumulated.
First Status
Second Status
Third Status
Fourth Status
0001 0000
0000 0000
0000 0000
0000 0000
Содержание TM U200D - B/W Dot-matrix Printer
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Страница 154: ...Appendix A 6 Rev B Main Circuit Board A Parts Layout ...
Страница 155: ...Rev B Appendix A 7 TM U200D U200PD Technical Manual Main Circuit Board C Parts Layout ...
Страница 156: ...Appendix A 8 Rev B RS 232 Serial Interface Circuit Board Parts Layout ...
Страница 168: ...Rev B A 20 TM U200D U200PD Technical Manual Case Unit Lubrication Points Diagram 2 color Print Version ...
Страница 169: ...Rev B A 21 TM U200D U200PD Technical Manual Case Unit Lubrication Points Diagram ...