State monitoring in printer system

A printer system, comprising:

• a host computer configured to generate and transmit print data;
• and
• a printer connected to the host computer via a communication line and configured to receive the print data and perform printing based on the print data, wherein
• the host computer includes:
• a first communication interface connected to the printer;
• a display;
• and
• a first control unit configured to perform a first monitoring operation to determine operation states of the host computer and the printer and a communication state of the communication line in association with a monitored time, the printer includes:
• a second communication interface connected to the host computer;
• and
• a second control unit configured to perform a second monitoring operation to determine operation states of the host computer and the printer and a communication state of the communication line in association with a monitored time, and control the second communication interface to transmit a result of the second monitoring operation to the host computer via the communication line, and
• the first control unit is configured to control the display to display a result of the first monitoring operation and the result of second monitoring operation received from the printer.

A printer system, comprising:

• a host computer configured to generate and transmit print data;
• and
• a printer connected to the host computer via a communication line and configured to receive the print data and perform printing based on the print data, wherein
• the host computer includes:
• a first communication interface connected to the printer;
• and
• a first control unit configured to perform a first monitoring operation to determine operation states of the host computer and the printer and a communication state of the communication line in association with a monitored time, and control the first communication interface to transmit a result of the first monitoring operation to the printer via the communication line, the printer includes:
• a second communication interface connected to the host computer;
• a display;
• and
• a second control unit configured to perform a second monitoring operation to determine operation states of the host computer and the printer and a communication state of the communication line in association with a monitored time, and control the display to display the result of the first monitoring operation received from the host computer and a result of second monitoring operation.