Programmers Guide
TH320/420
128
Triggers that cause the journal flash buffer to be cleared are:
Clear Journal command (described below)
Flash Memory User Sectors Allocation command
(0x1D 0x22 0x 55 n1 n2)
reallocates flash memory.
New Flash firmware is downloaded to the printer
Exception Conditions in Auto Journal Mode
When there isn’t enough memory available in the journal flash buffer, the printer beeps at each receipt
to signal the flash full condition. The printer will print a duplicate receipt and cut after it, instead of
writing it to flash, and clear out the RAM buffer. When the trigger for writing to flash is a knife cut (which
would be the usual case in Auto Journal Mode) the customer receipt is easily detached from the
duplicate receipt by the operator.
If a receipt is over 4Kbytes in size, and there are less than 4Kbytes available in the journal flash buffer,
the printer will not print a portion of the duplicate receipt in the middle of the original receipt. This
portion of the duplicate receipt is lost.
Exception Conditions in Direct Journal Mode
When there isn’t enough memory available in the journal flash buffer, the printer beeps but doesn’t try
to print anything. The printer clears out the RAM buffer and this data intended for the journal is lost.
Security
There is no offline method implemented for configuring the printer to power up in Auto Journal Mode
or in DirectJournal Mode. There is no offline method implemented for printing the journal or erasing
the journal flash buffer. These functions are available only via command, during run time. Other than
the contents of the journal flash buffer, nothing is preserved over power cycle.
Summary of Contents for TH320
Page 1: ...TH320 TH420 Two Color Thermal Impact Hybrid Printer Programmers Guide ...
Page 75: ...TH320 TH420 Programmers Guide 67 ...
Page 121: ...TH320 TH420 Programmers Guide 113 Character Sets Character code 437 USA Standard Europe ...
Page 122: ...Programmers Guide TH320 420 114 Codepage 737 Greek ...
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Page 142: ...Programmers Guide TH320 420 134 TH420 Additional Features ...
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Page 157: ...TH320 TH420 Programmers Guide Wincor Nixdorf International GmbH D 33094 Paderborn ...