Printer, method of controlling it, and data storage medium

摘要

Real-time commands are processed even when the printer is offline. When a stop sound command is received while the printer is offline, Report Completed Flag in each record in the error response table (271) is set to 1, and control then returns from the receive interrupt process. That is, emission of sound is stopped until a new error occurs. When the user notices that the printer is offline and starts to correct the cause of the offline status, by using the stop sound command the host (102) can stop the buzzer (231) and the user can correct the problem without listening to an irritating buzzer.