Epson 100-88002 Miscellaneous Communication Features, Power-cycle Recovery, Off-line Control

Epic 880TM Extended Printer Control

Miscellaneous Communication Features

Power-cycle Recovery

Sometimes the host needs to know if the printer was power cycled. An example would be after the receipt tape was changed. It is not necessary to turn off the printer to change the receipt. However, if the operator does, any information sent to the printer before the power cycle will be lost.

The Epic 880TM Printer has a flag that is set after a reset. The flag stays set until the host requests a reset. The [ENQ] <11> command reads the flag. If the command returns power-cycled status, the power has been reset or power cycled since the last request. All unprinted information has been lost.

If the print operation is critical, it is a good idea to check the power-cycle flag before and after all transactions. An alternate approach is to check the flag after every off- line to on-line transition.

Note: If the printer mode was changed by the [ESC] y <2> or <3> command, a power- cycle reset will return to the initial configuration.

Off-line Control

A configuration flag that prevents the printer from going off-line (in most cases) is available. Off-line mode allows the application to query the printer for status rather than assume a status from the control signals. The feature allows the host application to query the printer at all times except when there is no power; a full input buffer; or a hard failure. For example, when the printer’s cover is open, the printer stops printing but still accepts data and inquiries. The inquire cover status command returns, “Cover open.”

Hard failures result when there is no power or a printer fault occurs. If the printer is off-line, either the input buffer is full or a hard fault has occurred. The host application should not allow the input buffer to fill.

100-88002 Rev B Page 233