Epson C31C636A898 Technical Reference - Page 52
NVRAM Non-volatile Memory, Bar Code Printing - scanners
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Note: When DIP SW2-1 is ON, the printer will not become BUSY even if printer hardware stops operating. • When an error has occurred • When the cover is open • When printing has stopped for a paper out • When paper is fed by the FEED button 3.5 NVRAM (Non-volatile Memory) NVRAM is mounted on this printer, and bitmap images (for example, business logos) or other data are written to it. Pay attention to the following when using NVRAM. ❏ The following restriction applies when performing operations (including storing and deleting data) in NVRAM. • Do not use the FEED button. ❏ The printer sometimes enters the BUSY state when data is being written to NVRAM. It is important not to send data from the host computer while the printer is in the BUSY state, because the printer cannot process any received data. ❏ Frequent use of the functions for writing data to and deleting data from NVRAM may damage the memory. As a rule, in using the various commands to write to NVRAM, avoid writing more than an average of ten times per day. 3.6 Bar Code Printing This printer can print the following types of bar codes: UPC-A, UPC-E JAN 8 (EAN 8), JAN 13 (EAN 13) CODE 39 ITF (Interleaved 2 of 5) CODABAR (NW-7) CODE 93 CODE 128 PDF417 (2D code ) QR Code To set and print each bar code, refer to the OPOS, Advanced Printer Driver, and ESC/POS command documentation, respectively. Note: Take a consideration as described below to determine whether the ability of the reader (scanner) can be satisfied when the print result on the receipt, such as bar code, 2-dimensional code, or characters. • Print density The print density may vary depending on the type of roll paper or the environmental conditions. 3-12 Application Development Information Rev. A