Image forming system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 23, 1992
Grant Date -
N/A
app pub date -
Nov 15, 1989
filing date -
Nov 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image forming system includes a processor, a print engine and optional units. A serial signal line couples the print engine and the optional units. The processor has a command sending function of sending the print engine a command which asks the print engine whether or not the print engine can communicate with each of the optional units. The print engine has a function of managing a variety of information including data relating to status of the optional units, and a function of determining, in response to the command, as to whether each of the optional units is in a communication active state where it can communicate with the print engine on the basis of the managed information and a function of sending the processor a response which indicates information on whether each of the optional units is in the communication active state.
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