Fanuc Alarm 86: DR SIGNAL OFF
Fanuc Alarm 86: DR SIGNAL OFF
Fanus Control Model: Fanuc 16, 18, and 21 Series (including i-series), Fanuc 0/0i Series (0-M, 0-T, 0i-MA, 0i-TB, 0i-MC, etc.)
Description
This simply means that the controller is not receiving a “Data Set Ready” (DSR) signal from the external device PC or laptop.
This problem mostly occurs when you try to transfer a program via the RS-232 port.
How to Fix Alarm
The I/O CHANNEL must be set to the correct number. Typically for RS-232 this is 0 or 1.