Fanuc Parameter | 1860

If the absolute encoder battery dies, the machine "forgets" the value in 1860. You will see alarms (like DS0300 APC Alarm: Need ZRN ) because the stored value no longer matches a valid reference.

: Navigate to the SETTING screen and set PARAMETER WRITE (PWE) to 1.

To understand Parameter 1860, you must visualize the control hierarchy:

Under normal operation, you do not manually edit this parameter; the CNC system updates it automatically as the machine moves. Parameter 1860 vs. Parameter 1815 fanuc parameter 1860

The CNC router, a five-axis beast named “Goliath,” had fallen silent. Not the good silence of a job well done, but the terrible silence of a catastrophic alarm.

: Press the SYSTEM key, then the PARAM softkey, and type 1860 followed by [NO. SRH] . How to Enable Parameter Write Enable (PWE) on a Fanuc CNC

This parameter is a critical internal value that represents the absolute position of the axis relative to the reference point (home). When a machine is equipped with absolute encoders, it "remembers" its position even after being powered off. Parameter 1860 acts as the digital record of that specific physical location on the encoder's scale. Role in Absolute Homing If the absolute encoder battery dies, the machine

Another user reported a problem where after homing, the Z-axis position always displayed "11.8311" instead of zeroing out. The forum solution involved checking Parameter 1240, which holds the coordinate value of the reference position, not Parameters 1860 or 1861. This is a crucial distinction: Parameter 1240 defines the coordinate of the reference point, while 1860/1861 store the absolute position value of that point from the encoder. As one expert pointed out, "Machine Home Position and Machine Zero Position are usually not the same point". Adjusting Parameter 1240 to 0 would make the machine read zero when homed, but this will shift all work and tool offsets.

First, ensure mechanical freedom (check belt, bearings, drawbar). Then increase 1860 gradually.

Here's how it works:

The LCD on the guide box now read:

Defines the feedback resolution or the specific multiplier factor for the position detector stream. The Power-Up Logic

It is essential for rotary axes that use scales which may not hold speed data. Parameter 1860 Settings The parameter typically offers two settings: To understand Parameter 1860, you must visualize the

Modifying parameters on a FANUC control can be dangerous if done incorrectly. Forcing wrong values can cause the axis to runaway or trigger severe system alarms. Follow this industry-standard procedure to change the parameter safely: Step 1: Enable Parameter Write Enable (PWE) Press the mode button on the operator panel. Press the OFFSET/SETTING function key. Locate the SETTING screen.