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Changing servo parameters can cause axis runaways or crashes. Clear the machine work zone and be prepared to hit E-STOP immediately.
Use the directional cursor keys to highlight the specific axis you need to modify. Type the new value in detection units using the keypad. Press the softkey to save the change. Repeat for any other axes if necessary. Step 4: Clear the PWE Alarm Press the [OFFSET/SETTING] key again. Change PARAMETER WRITE (PWE) back from 1 to 0 . Press the [RESET] key to clear the flashing P/S 100 alarm.
You cannot effectively manage Parameter 1860 without understanding , as they are the two halves of the absolute positioning system.
If the machine loses reference position after power-off or experiences gradual home position drift, increasing P1860 slightly (e.g. from 500 to 2000) gives the control more tolerance to find the nearest grid point. (worn dogs, dirty limit switches, loose couplings). fanuc parameter 1860 full
handles small mechanical "grid shifts" for fine-tuning, Parameter 1860 handles the primary data offset for the absolute detector. Tool Change Alignment : On some machines, if the
: The value is established after an axis is successfully zeroed using Parameter 1815.4 (APZ)
Across different FANUC models and machine tool builder configurations, Parameter 1860 can appear in unexpected contexts. Changing servo parameters can cause axis runaways or crashes
The control will issue a "100 PARAMETER WRITE ENABLED" alarm; this is normal. Navigate to [PARAMETER] , and press to find the specific axis values.
Working with parameters like 1860 brings you into the very core of the machine's positioning logic. A few final points to keep in mind:
What is the (e.g., 0i-MD, 18i-TB)? What specific alarm number are you seeing? Type the new value in detection units using the keypad
If your machine is constantly tripping a alarm during rapid movements, Parameter 1860 is flagging a genuine system failure. While you can temporarily increase the value in Parameter 1860 to diagnose the issue, the root cause is rarely the parameter itself. Look for these common mechanical and electrical issues: 1. Mechanical Binding or Heavy Friction
Before concluding, it is vital to include the warnings found in the FANUC additional manuals, as these are often missed:
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