Firmware 1.20 released
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I seriously think my WiFi module is bad. this thing has been nothing but issues, drops connection. won't reconnect 1/2 the time with out a complete power down and restart and then I always had to go in and reconfigure the network info. Every single time. did everything you stated above ad it won't work. Now I can't even get the wifi to turn back on under 1.8.
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M552 S1
SENDING:M552 S1
WiFi module started
Error: Failed to initialise WiFi module, code -10
[ERROR] Error: Failed to initialise WiFi module, code -10or,…
M552 S0
SENDING:M552 S0
WiFi module started
Error: Failed to initialise WiFi module, code -10
[ERROR] Error: Failed to initialise WiFi module, code -10 -
That error usually means that the main firmware and wifi firmware are out of step, i.e. one is pre-1.19 and the other is 1.19 or later. So use M115 to check that your main firmware is version 1.20; then use your PC to put a fresh copy of DuetWiFiServer.bin from the 1.20 release area of github into /sys on the SD card; put it in the Duet, start the Duet, connect via USB, and send M997 S1 to install it. If/when it reports success, try M552 S1 again.
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seems to be working.
thanks… so far anyway!! AWESOme!Connecting...
Printer is now online.m115
SENDING:M115
FIRMWARE_NAME: RepRapFirmware for Duet WiFi FIRMWARE_VERSION: 1.20 ELECTRONICS: Duet WiFi 1.0 FIRMWARE_DATE: 2017-12-23
Disconnected.
Connecting...
Printer is now online.
M997 S1
SENDING:M997 S1
Trying to connect at 230400 baud:
success
Erasing 4096 bytes...
Erasing 233472 bytes...
Uploading file...
5% complete
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Upload successful
M552 S1
SENDING:M552 S1
WiFi module started
Wifi module is connected to access point ####, IP address ####### -
so it is working… I recorded this so I could show it if it didn't work and see if I was doing something wrong or it was omething that you guys could see I was missing, or what ever... anyway.. I'll post it for kicks.
https://youtu.be/ICiRkWutB2U -
I had problems installing newer versions than 1.19 on my Duet 0.6 - it would not run.
Can I use the 1.20 on this old board or is the board limited to 1.19?
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Yes there is a build of 1.20 for the Duet 0.6 and 0.8.5.
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Great! Thanks.
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I'm still having problems I'm afraid. Cannot connect to my Duet 0.6 after upgrade to 1.20.1 (RepRapFirmware.bin). I can see that it boots up and runs for about 25 secs, then both ethernet connecor LEDs go out for 3-4 seconds and pattern repeats over an over.
I've installed manually the DuetWebControl associated with this firmware release.
Any ideas?
Regards /Thom
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I tested 1.20 on a Duet 0.8.5 but not on a 0.6. You could try putting a minimal config.g file on the SD card, with the network parameters and not much else in it.
Version 1.19.2 was tested on a Duet 0.6.
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This is my current config.g
[c]
; Configuration file for Duet 0.6 (firmware version 1.17 to 1.19)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Fri Nov 17 2017 18:51:38 GMT+0100 (Västeuropa, normaltid); General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves
M555 P1 ; Set firmware compatibility to look like RepRapFirmare;Delta parameters
M665 L190.000 R90 H236.8 B72.0 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; Endstops
M208 Z-0.5 S1 ; Set minimum Z; Endstops
M574 X2 Y2 Z2 S1 ; Set active high endstops
M558 P4 X0 Y0 Z0 H4 F120 T8000 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds
G31 P600 X0 Y0 Z-0.10 ; Set Z probe trigger value, offset and trigger height
M557 R78 S20 ; Bed mesh; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M92 X100 Y100 Z100 E141.8 ; Set steps per mm
M566 X1200 Y1200 Z1200 E1500 ; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 Z18000 E12000 ; Set maximum speeds (mm/min)
M201 X2200 Y2200 Z2200 E2000 ; Set accelerations (mm/s^2)
M906 X960 Y960 Z960 E1600 I60 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout; Heaters
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B3950 C0 R1000 H10 ; Set thermistor + ADC parameters for heater 0
M143 H0 S130 ; Set temperature limit for heater 0 (bed) to 130C
M305 P1 T100000 B4267 C0 R1000 H10 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C; Tools
M563 P0 D0 H1 ; 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; Network
M550 PMy Mini Kossel ; Set machine name
M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet; Fans
M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency.
; thermostatic control is turned off; Read in calibration override settings
M501
G29 S1 ; Read in bed height correction map; Miscellaneous
T0 ; Select first tool
[/c]I'm going to try the network parameters only and then if I manage to connect to it, I'll uncomment paragraphs
step by step./Thom
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I'm still having problems I'm afraid. Cannot connect to my Duet 0.6 after upgrade to 1.20.1 (RepRapFirmware.bin). I can see that it boots up and runs for about 25 secs, then both ethernet connecor LEDs go out for 3-4 seconds and pattern repeats over an over.
I've installed manually the DuetWebControl associated with this firmware release.
Any ideas?
Regards /Thom
This sounds exactly like my problem with 0.85 too.
I did not think about simplifying the config.g, since this is not an option to my opinion, but I am curious to see the results. I am still on 1.18.1 because of that. The 1.19 does run, but it is very unstable, and the 1.20 will not start up at all with my config. -
I'm able to make connection via the USB port using Repetier-Host V2.05. A short clip from the serial log:
[c]22:27:09.813 : RepRapFirmware for Duet is up and running.
22:27:09.816 : N10 M111 S686
22:27:09.816 : FIRMWARE_NAME: RepRapFirmware for Duet FIRMWARE_VERSION: 1.20.1RC2 ELECTRONICS: Duet 0.6 FIRMWARE_DATE: 2018-01-01
22:27:09.816 : N11 T010
22:27:09.847 : X:0.000 Y:0.000 Z:0.000 E0:0.0 E1:0.0 E2:0.0 E3:0.0 E4:0.0 E5:0.0 Count 0 0 0 User 0.0 0.0 0.0
22:27:09.847 : serial: T0
22:27:09.847 : serial: M20
22:27:09.847 : Begin file list
22:27:09.849 : Enclosures
22:27:09.849 : Kossel
22:27:09.849 : Art
22:27:09.849 : Supports and mounts
22:27:09.849 : X5S
22:27:09.849 : Couplings
22:27:09.849 : MK PLA L015 N035 (Noraft) PrtAlignmentModel.gcode
22:27:09.849 : Diverse
22:27:09.849 : Gee(i3)
22:27:09.849 : Alu profile 20x20
22:27:09.852 : End file list
22:27:09.852 : serial: M80
22:27:09.852 : serial: M105
22:27:09.853 : serial: M111 S6
22:27:09.853 : serial: T0
22:27:12.803 : N12 M10520
22:27:12.805 : serial: M105
22:27:15.863 : N13 M10521
22:27:15.864 : serial: M105
22:27:18.929 : N14 M10518
22:27:18.930 : serial: M105
22:27:21.989 : N15 M10519
22:27:21.990 : serial: M105
22:27:25.048 : N16 M10516
22:27:25.049 : serial: M105
22:27:28.114 : N17 M10517
22:27:28.114 : serial: M105
22:27:31.174 : N18 M10530
22:27:31.175 : serial: M105
22:27:34.240 : N19 M10531
22:27:34.241 : serial: M105
22:27:37.300 : N20 M10521
22:27:37.301 : serial: M105
22:27:40.367 : N21 M10520
22:27:40.368 : serial: M105
22:27:43.426 : N22 M10523
22:27:43.428 : serial: M105
22:27:46.492 : N23 M10522
22:27:46.493 : serial: M105
22:27:49.552 : N24 M105*17
22:27:49.553 : serial: M105
[/c]However, if I connect the Ethernet cable, Repetier-Host gets disconnected and the Reboot pattern starts to run again. The current config.g:
[c]
; Configuration file for Duet 0.6 (firmware version 1.17 to 1.19)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Fri Nov 17 2017 18:51:38 GMT+0100 (Västeuropa, normaltid); General preferences
;M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
;M83 ; ...but relative extruder moves
;M555 P1 ; Set firmware compatibility to look like RepRapFirmare;Delta parameters
;M665 L190.000 R90 H236.8 B72.0 ; Set delta radius, diagonal rod length, printable radius and homed height
;M666 X0 Y0 Z0 ; Endstops
;M208 Z-0.5 S1 ; Set minimum Z; Endstops
;M574 X2 Y2 Z2 S1 ; Set active high endstops
;M558 P4 X0 Y0 Z0 H4 F120 T8000 ; Set Z probe type to switch, the axes for which it is used and the dive height + speeds
;G31 P600 X0 Y0 Z-0.10 ; Set Z probe trigger value, offset and trigger height
;M557 R78 S20 ; Bed mesh; Drives
;569 P0 S1 ; Drive 0 goes forwards
;569 P1 S1 ; Drive 1 goes forwards
;M569 P2 S1 ; Drive 2 goes forwards
;M569 P3 S1 ; Drive 3 goes forwards
;M92 X100 Y100 Z100 E141.8 ; Set steps per mm
;M566 X1200 Y1200 Z1200 E1500 ; Set maximum instantaneous speed changes (mm/min)
;M203 X18000 Y18000 Z18000 E12000 ; Set maximum speeds (mm/min)
;M201 X2200 Y2200 Z2200 E2000 ; Set accelerations (mm/s^2)
;M906 X960 Y960 Z960 E1600 I60 ; Set motor currents (mA) and motor idle factor in per cent
;M84 S30 ; Set idle timeout; Heaters
;M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
;M305 P0 T100000 B3950 C0 R1000 H10 ; Set thermistor + ADC parameters for heater 0
;M143 H0 S130 ; Set temperature limit for heater 0 (bed) to 130C
;M305 P1 T100000 B4267 C0 R1000 H10 ; Set thermistor + ADC parameters for heater 1
;M143 H1 S280 ; Set temperature limit for heater 1 to 280C; Tools
;M563 P0 D0 H1 ; 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; Network
M550 PMy Mini Kossel ; Set machine name
M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet; Fans
;M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency.
; thermostatic control is turned off; Read in calibration override settings
;M501
;G29 S1 ; Read in bed height correction map; Miscellaneous
;T0 ; Select first tool
[/c] -
As I work with embedded systems myself I see the typical symptoms of a stack crash. While watching the output from the serial line I could observe some kind of "hartbeat" messages from classes running inside the Duet. All seems normal until I plug the ethernet cable in. Then everything just stops.
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If you run M122 from USB, how much free memory does it report?
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I'm not sure wich number you're after so I copied the entire response:
[c]17:34:17.138 : serial: M122
17:34:17.143 : LINK
17:34:17.145 : xmit: 0
17:34:17.145 : recv: 0
17:34:17.145 : fw: 0
17:34:17.145 : drop: 0
17:34:17.145 : chkerr: 0
17:34:17.145 : lenerr: 0
17:34:17.145 : memerr: 0
17:34:17.145 : rterr: 0
17:34:17.145 : proterr: 0
17:34:17.145 : opterr: 0
17:34:17.145 : err: 0
17:34:17.145 : cachehit: 0
17:34:17.145 : ETHARP
17:34:17.145 : xmit: 0
17:34:17.145 : recv: 0
17:34:17.145 : fw: 0
17:34:17.145 : drop: 0
17:34:17.145 : chkerr: 0
17:34:17.145 : lenerr: 0
17:34:17.145 : memerr: 0
17:34:17.145 : rterr: 0
17:34:17.146 : proterr: 0
17:34:17.146 : opterr: 0
17:34:17.146 : err: 0
17:34:17.146 : cachehit: 0
17:34:17.146 : IP_FRAG
17:34:17.146 : xmit: 0
17:34:17.146 : recv: 0
17:34:17.146 : fw: 0
17:34:17.146 : drop: 0
17:34:17.146 : chkerr: 0
17:34:17.146 : lenerr: 0
17:34:17.146 : memerr: 0
17:34:17.146 : rterr: 0
17:34:17.146 : proterr: 0
17:34:17.146 : opterr: 0
17:34:17.146 : err: 0
17:34:17.146 : cachehit: 0
17:34:17.146 : IP
17:34:17.146 : xmit: 0
17:34:17.146 : recv: 0
17:34:17.146 : fw: 0
17:34:17.146 : drop: 0
17:34:17.146 : chkerr: 0
17:34:17.146 : lenerr: 0
17:34:17.147 : memerr: 0
17:34:17.147 : rterr: 0
17:34:17.147 : proterr: 0
17:34:17.147 : opterr: 0
17:34:17.147 : err: 0
17:34:17.147 : cachehit: 0
17:34:17.147 : IGMP
17:34:17.147 : xmit: 0
17:34:17.147 : recv: 0
17:34:17.147 : drop: 0
17:34:17.147 : chkerr: 0
17:34:17.147 : lenerr: 0
17:34:17.147 : memerr: 0
17:34:17.147 : proterr: 0
17:34:17.147 : rx_v1: 0
17:34:17.147 : rx_group: 0
17:34:17.147 : rx_general: 0
17:34:17.147 : rx_report: 0
17:34:17.147 : tx_join: 0
17:34:17.148 : tx_leave: 0
17:34:17.148 : tx_report: 0
17:34:17.148 :
17:34:17.148 : ICMP
17:34:17.148 : xmit: 0
17:34:17.148 : recv: 0
17:34:17.148 : fw: 0
17:34:17.148 : drop: 0
17:34:17.148 : chkerr: 0
17:34:17.148 : lenerr: 0
17:34:17.148 : memerr: 0
17:34:17.148 : rterr: 0
17:34:17.148 : proterr: 0
17:34:17.148 : opterr: 0
17:34:17.148 : err: 0
17:34:17.148 : cachehit: 0
17:34:17.148 : UDP
17:34:17.148 : xmit: 0
17:34:17.148 : recv: 0
17:34:17.148 : fw: 0
17:34:17.148 : drop: 0
17:34:17.148 : chkerr: 0
17:34:17.148 : lenerr: 0
17:34:17.148 : memerr: 0
17:34:17.149 : rterr: 0
17:34:17.149 : proterr: 0
17:34:17.149 : opterr: 0
17:34:17.149 : err: 0
17:34:17.149 : cachehit: 0
17:34:17.149 : TCP
17:34:17.149 : xmit: 0
17:34:17.149 : recv: 0
17:34:17.149 : fw: 0
17:34:17.149 : drop: 0
17:34:17.149 : chkerr: 0
17:34:17.149 : lenerr: 0
17:34:17.149 : memerr: 0
17:34:17.149 : rterr: 0
17:34:17.149 : proterr: 0
17:34:17.149 : opterr: 0
17:34:17.149 : err: 0
17:34:17.149 : cachehit: 0
17:34:17.149 : MEM HEAP
17:34:17.149 : avail: 1024
17:34:17.150 : used: 0
17:34:17.150 : max: 0
17:34:17.150 : err: 0
17:34:17.150 : MEM UDP_PCB
17:34:17.150 : avail: 5
17:34:17.150 : used: 2
17:34:17.150 : max: 2
17:34:17.150 : err: 0
17:34:17.150 : MEM TCP_PCB
17:34:17.150 : avail: 16
17:34:17.150 : used: 0
17:34:17.150 : max: 0
17:34:17.150 : err: 0
17:34:17.150 : MEM TCP_PCB_LISTEN
17:34:17.151 : avail: 4
17:34:17.151 : used: 0
17:34:17.151 : max: 0
17:34:17.151 : err: 0
17:34:17.151 : MEM TCP_SEG
17:34:17.151 : avail: 16
17:34:17.151 : used: 0
17:34:17.151 : max: 0
17:34:17.151 : err: 0
17:34:17.151 : MEM REASSDATA
17:34:17.151 : avail: 2
17:34:17.151 : used: 0
17:34:17.151 : max: 0
17:34:17.151 : err: 0
17:34:17.151 : MEM FRAG_PBUF
17:34:17.151 : avail: 8
17:34:17.151 : used: 0
17:34:17.151 : max: 0
17:34:17.151 : err: 0
17:34:17.151 : MEM IGMP_GROUP
17:34:17.152 : avail: 8
17:34:17.152 : used: 0
17:34:17.152 : max: 0
17:34:17.152 : err: 0
17:34:17.152 : MEM SYS_TIMEOUT
17:34:17.152 : avail: 8
17:34:17.152 : used: 6
17:34:17.152 : max: 6
17:34:17.152 : err: 0
17:34:17.152 : MEM PBUF_REF/ROM
17:34:17.152 : avail: 4
17:34:17.152 : used: 0
17:34:17.152 : max: 0
17:34:17.152 : err: 0
17:34:17.152 : MEM PBUF_POOL
17:34:17.152 : avail: 5
17:34:17.152 : used: 0
17:34:17.152 : max: 0
17:34:17.152 : err: 0
17:34:17.152 : === Diagnostics ===
17:34:17.153 : Used output buffers: 1 of 32 (15 max)
17:34:17.153 : === Platform ===
17:34:17.153 : RepRapFirmware for Duet version 1.20.1RC2 running on Duet 0.6
17:34:17.153 : Static ram used: 44836
17:34:17.153 : Dynamic ram used: 40508
17:34:17.153 : Recycled dynamic ram: 672
17:34:17.153 : Stack ram used: 3520 current, 5528 maximum
17:34:17.153 : Never used ram: 6760
17:34:17.154 : Last reset 00:07:46 ago, cause: power up
17:34:17.154 : Last software reset time unknown, reason: Stuck in spin loop, spinning module Network, available RAM 8620 bytes (slot 2)
17:34:17.154 : Software reset code 0x2041 HFSR 0x00000000, CFSR 0x00000000, ICSR 0x0440f80f, BFAR 0xe000ed38, SP 0x20087e6c
17:34:17.155 : Stack: 000bfb1f 01c8a8c0 fffffff9 00ffffff 20087ebc 20070fe8 01c8a8c0 20087ebc 000a6221 000a6220 21000000 20087ea0 2007a938 00000000 2007376c 200737a8 20087ebc 0000012c 2007aea8 75207369 01c8a8c0 2007376c 000a5b1d 2001376c
17:34:17.155 : Error status: 0
17:34:17.155 : Free file entries: 10
17:34:17.155 : SD card 0 detected, interface speed: 21.0MBytes/sec
17:34:17.155 : SD card longest block write time: 0.0ms
17:34:17.155 : MCU temperature: min 26.2, current 27.3, max 27.8
17:34:17.156 : Date/time: 1970-01-01 00:00:00
17:34:17.156 : Slowest main loop (seconds): 0.009165; fastest: 0.000104
17:34:17.156 : === Move ===
17:34:17.156 : MaxReps: 0, StepErrors: 0, LaErrors: 0, FreeDm: 100, MinFreeDm 100, MaxWait: 0ms, Underruns: 0, 0
17:34:17.156 : Scheduled moves: 0, completed moves: 0
17:34:17.156 : Bed compensation in use: none
17:34:17.157 : Bed probe heights: 0.000 0.000 0.000 0.000 0.000
17:34:17.157 : === Heat ===
17:34:17.157 : Bed heaters = 0, chamberHeaters = -1 -1
17:34:17.157 : === GCodes ===
17:34:17.157 : Segments left: 0
17:34:17.157 : Stack records: 1 allocated, 0 in use
17:34:17.157 : Movement lock held by null
17:34:17.157 : http is idle in state(s) 0
17:34:17.157 : telnet is idle in state(s) 0
17:34:17.157 : file is idle in state(s) 0
17:34:17.157 : serial is ready with "M122" in state(s) 0
17:34:17.158 : aux is idle in state(s) 0
17:34:17.158 : daemon is idle in state(s) 0
17:34:17.158 : queue is idle in state(s) 0
17:34:17.158 : autopause is idle in state(s) 0
17:34:17.158 : Code queue is empty.
17:34:17.158 : === Network ===
17:34:17.158 : Free connections: 16 of 16
17:34:17.158 : Free transactions: 24 of 24
17:34:17.158 : Locked: 0, state: 2, listening: 0x0, 0x0, 0x0
[/c] -
The "heartbeat" message
[c]17:36:25.475 : N151 M10534
17:36:25.476 : serial: M105
17:36:28.535 : N152 M10533
17:36:28.537 : serial: M105
17:36:31.062 : Class GCodes spinning
17:36:31.062 : Class Move spinning
17:36:31.062 : Class Platform spinning
17:36:31.062 : Class Network spinning
17:36:31.062 : Class Network spinning
17:36:31.064 : Class Heat spinning
17:36:31.064 : Class PrintMonitor spinning
17:36:31.601 : N153 M10532
17:36:31.602 : serial: M105
17:36:34.660 : N154 M10539
17:36:34.661 : serial: M105
17:36:37.720 : N155 M10538
17:36:37.721 : serial: M105
17:36:40.786 : N156 M10537
17:36:40.787 : serial: M105
[/c] -
I upgraded my Duet WiFi firmware from 1.19 to 1.20 yesterday. All seems to be working but I'm getting strange error messages when I start a print. They start at layer 0 but I was slow to capture them - each layer gives an error like this:
[c]17:34:59Error: Bad command: // starting layer 19 at 2.47368mm
17:34:47Error: Bad command: // starting layer 18 at 2.4mm
17:34:35Error: Bad command: // starting layer 17 at 2.2mm
17:34:24Error: Bad command: // starting layer 16 at 2.18947mm
17:34:12Error: Bad command: // starting layer 15 at 2mm
17:34:01Error: Bad command: // starting layer 14 at 1.90526mm
17:33:49Error: Bad command: // starting layer 13 at 1.8mm
17:33:37Error: Bad command: // starting layer 12 at 1.62105mm
[/c]The print worked OK but layer height was 0.2mm so I'm a little surprised by some of the layer heights.
What does this mean, please?
Thanks.
Richard
(edited to correct the starting layer from 1 to 0)
-
OK, I figured out what it is. The slicer was adding a comment to the beginning of each layer. This was in the format "// starting layer [layer_num] at [layer_z]mm"
The // was being interpreted as a comment but is no longer being interpreted so. I have changed the setting to "; starting layer [layer_num] at [layer_z]mm" and will try this as soon as I have finished the running print and can try another.
I'll report back once I confirm that this is the issue and is sorted.
-
This is confirmed - it was a slicer setting, nothing at all to do with the Duet firmware but a bit strange that the prior version didn't report errors with that format. Anyway, all sorted, thanks.
OK, I figured out what it is. The slicer was adding a comment to the beginning of each layer. This was in the format "// starting layer [layer_num] at [layer_z]mm"
The // was being interpreted as a comment but is no longer being interpreted so. I have changed the setting to "; starting layer [layer_num] at [layer_z]mm" and will try this as soon as I have finished the running print and can try another.
I'll report back once I confirm that this is the issue and is sorted.
