You can use a Ping command to make sure the computer is connected to the printer. Follow the steps below to check the connection using a Ping command.
Check the printer's IP address for the connection that you want to check.
You can check this from the Network Status screen on the printer's control panel, a connection report, or the IP Address column of a network status sheet.
Run Network Utility.
Enter "Network Utility" in Spotlight.
Click the Ping tab, enter the IP address that you checked in step 1, and then click Ping.
Check the communication status.
If the printer and the computer are communicating, the following message is displayed.
If the printer and the computer are not communicating, the following message is displayed.