@siam This fixed the issue, thank you.

@phaedrux The z probe value in duet web control is at 0 before trigerring, and remains at 1000 after triggering.

I have a Duet 2 Wifi with a Precision Piezo set up in digital mode. I had some initial trouble setting it up, but now the Z-Probe will trigger, but will never untrigger. The leds on the Zprobe still trigger correctly. Any thoughts on solutions? Config pasted below.

Config

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Wed Jun 16 2021 15:39:56 GMT-0400 (Eastern Daylight Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"FT6" ; set printer name

; Network
M551 P"harold" ; set password
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P2 S0 ; physical drive 2 goes forwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P0 S1 ; physical drive 0 goes backwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X2 Y1 Z0 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z722.00 E420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X350 Y720 Z400 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"!zstop" ; configure active-low endstop for low end on X via pin zstop
M574 Y1 S1 P"!ystop" ; configure active-low endstop for low end on Y via pin ystop
M574 Z1 S2 ; use z probe as endstop

; Z-Probe
M558 C"!e0stop" P5 R0.4 F300 T6000 ; precision piezo, digital mode, NO/NC, delay, speed, not used as axis endstop
G31 P900 X0 Y0 Z-0.1 ; X, Y, Z offsets, debounce interval
M557 X25:325 Y20:700 P4:10 ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M307 H0 R0.416 C361.2 D3.91 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 R2.428 C222.6 D7.17 S1.00 V27.5 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S300 ; set temperature limit for heater 1 to 300C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency. Part Cooling Fan.
M106 P0 S0 H-1 C"BERD AIR" ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency. Hotend Fan.
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"fan2" Q500 ; create fan 1 on pin fan1 and set its frequency. CPU Fan.
M106 P2 S1 H0 T40 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0 S"Extruder" ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M575 P1 S1 B57600 ; enable support for PanelDue
M591 D0 P3 C"e0_stop" C3 R40:120 E3.0 S0 ; filament monitor connected to E0_stop M591 D0 P5 S1 L25.70 R70:130 E3.00
T0 ; select first tool