Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 376)

MicroLogix 1000 and PLC-500 A.I. Series Software Reference
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Available Commands
The following functions are available from this screen.
[Alt-B] Sends a 0.5 second break.
[Alt-C] Clears the Terminal Screen. This function changes the display only, it does
not actually send a command to the modem.
[Alt-H] Sends the Hang Up command to the modem. Use this function to terminate
an existing connection.
[Alt-X] Exits the Terminal Program Utility. If you are currently connected with
another modem, you will be asked to hang up the line. Press [F1] Yes to
hang up the modem; press [F5] No (or [Esc] ) to leave the connection active
for future communications.