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method, change the FlagWhenIdle property to TRUE. When all data has finished printing, the
printer becomes idle and a StatusUpdateEvent is fired to the application with the value of
PTR_SUE_IDLE.
5.1.2.2 Printer Errors and Status
A change in printer status when asynchronous data is being sent is made available to the
program by the firing of an ErrorEvent and StatusUpdateEvent. When the printer changes status
while nothing is happening, the change is told to the program by a StatusUpdateEvent only.
As an example, assume that the printer cover becomes open. Usually, when data is not being
sent to the printer and the cover is opened, a StatusUpdateEvent is fired to the application. After
the AsyncMode property is set to TRUE and a method is used to print data, if the cover is
opened while the data is being sent, the program is notified by an ErrorEvent. ErrorEvents are
fired when the error has interrupted the data that is being sent. Only StatusUpdateEvent will
fire when the error does not effect the data and the data will continue being sent as normal.
Reasons for the ErrorEvent being fired and the corresponding error names are listed below.
ResultCode/ ResultCodeExtended Reason
OPOS_E_ILLEGAL
OPOS_E_EXTENDED
OPOS_EPTR_COVER_OPEN
OPOS_EPTR_REC_EMPTY
OPOS_E_FAILURE
OPOS_EPTR_UNRECOVERABLE
OPOS_EPTR_CUTTER
OPOS_EPTR_MECHANICAL
OPOS_EPTR_OVERHEAT
OPOS_EX_DEVBUSY
OPOS_EPTR_REC_CARTRIDGE_REMOVED
OPOS_EPTR_REC_CARTRIDGE_EMPTY
OPOS_EPTR_REC_HEAD_CLEANING
After an error occurs, more detailed information about the error can be obtained from the
ErrorLevel, ErrorStation, and ErrorString properties.
5.1.2.3 ESC/POS commands
When you use ESC/POS commands to control the printer, you can get the status by using
"status command" including Auto Status Back command (ASB.) Please refer to "ESC/POS
APG."
Rev. H
There is an abnormality with the device. (Includes the
following 1 error)
Error determined by the device's SO (Includes the
following 4 errors)
Cover is open.
Receipt paper is empty.
Hard error (Includes the following 6 errors).
Error that cannot be recovered from.
Error with the auto cutter.
Mechanical error.
Head overheat error.
Device busy error.
Receipt cartridge is removed.
Receipt cartridge is empty.
Receipt head starts cleaning.
Application Development Information 5-3
TM-U220 Technical Reference Guide
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