Duet 2 Wifi shutdown immediately after restart

[Loris]

Hi all,
i just end to build my printer, i'm using a regular 24v 500w psu, a ssr 25DA and a temporary 220v switch to allow auto shutdown.
M81 is working fine, i put M80 at the start of config.g.
Every time i chose to restart the board when config.g is saved, the board restarts but immediately the psu turns off.
The PSU is set to 24.2v.
Any suggestion?
Thanks

[Phaedrux]

Can you show us your config.g and maybe a diagram of how you have things wired?

[Loris]

This is my config

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Tue Aug 11 2020 17:42:02 GMT-0500 (Central Daylight Time)
 
; General preferences
M80														; Turns on the ATX power supply
G90                                                     ; send absolute coordinates...
M83                                                     ; ...but relative extruder moves
M550 P"BLV Cube"                                        ; set printer name
M669 K1													; Select CoreXY mode
 
; Network
M552 S1                                                 ; enable network
M586 P0 S1                                              ; enable HTTP
M586 P1 S0                                              ; disable FTP
M586 P2 S0                                              ; disable Telnet
 
; Drives
M569 P0 S1                                              ; physical drive 0 goes forwards
M569 P1 S0                                              ; physical drive 1 goes backwards
M569 P2 S0                                              ; physical drive 2 goes backwards
M569 P3 S0                                              ; physical drive 3 goes backwards
M569 P4 S0                                              ; physical drive 3 goes backwards
 
M671 X-64.75:366.75 Y150:150 S10	   			   ; leadscrew pivot point: Left -65:150, Right 364:150
;Distance between leadscrews = 429.5mm
;Center of leadscrew 12.5mm away from outside edge of 2020 bed carriage extrusion
;If everything is centered correctly the center of the leadscrew is 150mm away from front and back of the bed
 
M584 X0 Y1 Z2:4 E3                                      ; set drive mapping Z2=Left, Z4=Right
M350 X32 Y32 Z16 E16 I1                            		; configure microstepping with interpolation
M92 X200.00 Y200.00 Z400.00 E406.56                		; set steps per mm
M566 X700.00 Y700.00 Z240.00 E2000.00                   ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z1000.00 E2000.00              ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z100.00 E4000.00                 ; set accelerations (mm/s^2)
M906 X1600 Y1600 Z800 E1600 I30                         ; set motor currents (mA) and motor idle factor in per cent
M84 S120                                                ; Set idle timeout
 
; Axis Limits
M208 X-23 Y0 Z0 S1                                       ; set axis min
M208 X320 Y321 Z350 S0                                  ; set axis max
 
; Endstops
M574 X1 S1 P"xstop"                                     ; configure active-high endstop for low end on X via pin xstop
M574 Y2 S1 P"ystop"                                     ; configure active-high endstop for high end on Y via pin ystop
M574 Z1 S2                                              ; configure Z-probe endstop for low end on Z
M591 D0 P1 C"e0stop" S1								    ; configure filament runout sensor for high end on extruder drive 0 via pin i03.in
 
; Z-Probe
M950 S0 C"exp.heater3"                                  ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F300 T9000                     ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z.780                                    ; set Z probe trigger value, offset and trigger height
M557 X30:270 Y30:270 P4                                 ; define mesh grid
 
; Heaters
M308 S0 P"bedtemp" Y"thermistor" A"Bed" T100000 B4725 C0.0000000706 R4700 ; 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 A284.0 C843.8 D11.0 B0							; Heatbed PID
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" A"Hotend" T100000 B4725 C0.0000000706 R4700  ; 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 A284.1 C115.5 D2.6 V23.9 S0.9 B0				; Hotend PID .4mm
M143 H1 S260											; set temperature limit for heater 0 to 260C
M308 S2 P"mcu-temp" Y"mcu-temp" A"Duet Board" 			; Configure MCU sensor
 
; Fans
M950 F0 C"fan0" Q500                                    ; create fan 0 on pin fan0 and set its frequency
M106 P0 C"MB Fan" T35:55 H2                             ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500                                    ; create fan 1 on pin fan1 and set its frequency
M106 P1 C"Layer fan" S0 H-1                             ; set fan 1 value. Thermostatic control is turned off
M950 F2 C"fan2" Q500                                    ; create fan 2 on pin fan2 and set its frequency
M106 P2 C"HE Fan" S1 H1 T40                             ; set fan 2 value. Thermostatic control is turned off
 
; Tools
M563 P0 D0 H1 F1                                   		; 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
M564 H0                                   	            ; Let the Jog buttons work blv: added to allow jog buttons
 
; Miscellaneous
M575 P1 S1 B57600                                       ; enable support for PanelDue

I follow exaclty this wiring,

[Loris]

Please help me

[A Former User]

Resetting the board has the same effect as M81 on the PS_ON pin, so that is expected behaviour even if not desired.

You can move the PS_ON pin to GND while setting up the printer to work around it, and move it back to PS_ON when you need to turn the printer off from web.

[BoA]

You could try putting capacitor on SSR input.