Best posts made by developeralgo222

@developeralgo222 @dc42 & @droftarts Finally got this fixed . The issue was bad cable /connection from 6XD to Expansion Board 1 of 3HC . Never trust any cables from China , OMG when i decided to splice them , they are really crappy no shields and no proper insulations per pair. Buyer be aware.Have seen this in many chinese made products on Amazon.

@droftarts said in Duet 3HC Expansion looses Connection:

@developeralgo222 Yes, that is correct. The three V- terminals on each power supply are basically one output, they are linked to the same rail. Use a decent sized gauge of wire, at least as big as the other power wires.

I asked @dc42 the other day if your problem might be down to an issue with shared ground. I hadn't spotted that you are using two PSUs. However, I thought the CAN bus was pretty tolerant of this sort of thing, but maybe not.

Ian

connected the cable ,now they are syncing without any timeouts

M122  B1
Diagnostics for board 1:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.4 (2021-12-10)
All averaging filters OK
Never used RAM 156976, free system stack 202 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,138) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,5.7%,103) MAIN(1,running,93.1%,413) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.1%,263), total 100.0%
Last reset 00:00:42 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 35139, writes 11 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 35139, writes 11 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 35140, writes 11 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -4/5, peak Rx sync delay 156, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.2, current 24.2, max 24.2
V12 voltage: min 12.4, current 12.4, max 12.4
MCU temperature: min 17.9C, current 20.5C, max 20.5C
Last sensors broadcast 0x00000000 found 0 142 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 364, send timeouts 0, received 221, lost 0, errs 54, boc 0, free buffers 38, min 38, error reg 360000
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0
ok

M122  B2

Diagnostics for board 2:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.4 (2021-12-10)
All averaging filters OK
Never used RAM 156976, free system stack 202 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,5.7%,103) MAIN(1,running,93.1%,436) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.1%,263), total 100.0%
Last reset 00:00:46 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 48746, writes 11 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 48746, writes 11 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 48747, writes 11 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -5/7, peak Rx sync delay 157, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.3, current 24.3, max 24.3
V12 voltage: min 12.3, current 12.3, max 12.4
MCU temperature: min 21.1C, current 23.9C, max 23.9C
Last sensors broadcast 0x00000000 found 0 133 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 392, send timeouts 0, received 239, lost 0, errs 57, boc 0, free buffers 38, min 38, error reg 3a0000
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0
ok

M122  B3

Diagnostics for board 3:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.4 (2021-12-10)
All averaging filters OK
Never used RAM 156976, free system stack 202 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,5.7%,103) MAIN(1,running,93.1%,424) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.1%,263), total 100.0%
Last reset 00:00:53 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 10560, writes 11 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 10560, writes 11 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 10561, writes 11 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -7/6, peak Rx sync delay 155, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.2, current 24.2, max 24.2
V12 voltage: min 12.3, current 12.3, max 12.4
MCU temperature: min 21.1C, current 23.8C, max 23.8C
Last sensors broadcast 0x00000000 found 0 143 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 448, send timeouts 0, received 275, lost 0, errs 60, boc 0, free buffers 38, min 38, error reg 3c0000
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0
ok

M122  B4

Diagnostics for board 4:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.4 (2021-12-10)
All averaging filters OK
Never used RAM 156976, free system stack 204 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,5.7%,103) MAIN(1,running,93.1%,429) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.1%,263), total 100.0%
Last reset 00:00:55 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 21146, writes 11 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 21147, writes 11 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 80.0 steps/mm, standstill, SG min 0, mspos 8, reads 21147, writes 11 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -5/4, peak Rx sync delay 153, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.2, current 24.3, max 24.3
V12 voltage: min 12.4, current 12.4, max 12.4
MCU temperature: min 21.6C, current 24.4C, max 24.4C
Last sensors broadcast 0x00000000 found 0 110 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 470, send timeouts 0, received 287, lost 0, errs 63, boc 0, free buffers 38, min 38, error reg 3f0000
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0
ok

M122  B0

=== Diagnostics ===
RepRapFirmware for Duet 3 MB6XD version 3.5.0-rc.2 (2023-12-14 10:33:00) running on Duet 3 MB6XD v1.01 or later (standalone mode)
Board ID: 0JD2M-999AL-D25S0-7J9DA-3SJ6S-T43V2
Used output buffers: 1 of 40 (7 max)
=== RTOS ===
Static ram: 153284
Dynamic ram: 117344 of which 0 recycled
Never used RAM 72508, free system stack 176 words
Tasks: NETWORK(1,ready,105.3%,182) ETHERNET(5,nWait,0.0%,312) HEAT(3,nWait,0.0%,369) Move(4,nWait,0.0%,340) CanReceiv(6,nWait,0.0%,797) CanSender(5,nWait,0.0%,334) CanClock(7,delaying,0.0%,342) MAIN(1,running,226.8%,444) IDLE(0,ready,2.7%,30), total 334.8%
Owned mutexes: USB(MAIN)
=== Platform ===
Last reset 02:16:05 ago, cause: power up
Last software reset at 2024-01-15 20:32, reason: User, Gcodes spinning, available RAM 72304, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
MCU temperature: min 25.5, current 42.1, max 42.7
Supply voltage: min 0.1, current 24.0, max 24.7, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 0.1, current 12.2, max 12.2, under voltage events: 0
Heap OK, handles allocated/used 99/0, heap memory allocated/used/recyclable 2048/12/12, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: ok
Driver 1: ok
Driver 2: ok
Driver 3: ok
Driver 4: ok
Driver 5: ok
Date/time: 1970-01-01 00:00:00
Slowest loop: 21.40ms; fastest: 0.07ms
=== Storage ===
Free file entries: 20
SD card 0 detected, interface speed: 25.0MBytes/sec
SD card longest read time 2.5ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, segments created 0, maxWait 0ms, bed compensation in use: none, height map offset 0.000, max steps late 0, ebfmin 0.00, ebfmax 0.00
no step interrupt scheduled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
=== DDARing 0 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== DDARing 1 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks held by null, null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is ready with "M122  B0" in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
File2 is idle in state(s) 0
Queue2 is idle in state(s) 0
Q0 segments left 0, axes/extruders owned 0x0000000
Code queue 0 is empty
Q1 segments left 0, axes/extruders owned 0x0000000
Code queue 1 is empty
=== CAN ===
Messages queued 40919, received 2240, lost 0, errs 39255999, boc 1404
Longest wait 2ms for reply type 6024, peak Tx sync delay 22911, free buffers 50 (min 49), ts 40828/341/0
Tx timeouts 0,0,39777,47,0,0 last cancelled message type 30 dest 127
=== Network ===
Slowest loop: 0.47ms; fastest: 0.03ms
Responder states: MQTT(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 0 of 8
= Ethernet =
Interface state: active
Error counts: 0 0 0 1 0 0
Socket states: 2 2 2 2 2 0 0 0
=== Multicast handler ===
Responder is inactive, messages received 0, responses 0
ok

@droftarts said in Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards:

@developeralgo222 said in [Configs for PCB PnP for Duet3D 6XD and 3 x 3HC expansion boards]
This sounds like the functionality that we need to replicate. Like I've said, the enable wires aren't connected on either of the links you sent. My best guess is that the enable signal isn't quite right, but it seems to work with Mach3 with enable disconnected. Disconnect the enable wires.

@droftarts , i disconnected and the ENABLE Wires from the External Drive and the Duet 6XD and that did the trick. Now i am able to move X and Y -axis Motors now

@sebkritikel

The 6HC, 3HC, and 1HCL internally derive the STEP/DIR/etc and can directly control the phases of the stepper motors - like you said, you can connect the A+ to A+, A- to A-, B+ to B+, and B- to B- to directly drive the stepper motors.

This is helpful to know that 3HC internally derive the STEP/DIR/etc and can directly control the phases of the stepper motors and i don't need the External Drivers for fine tunning microsteps of STEP/DIR/ENA etc

@oliof said in Duet 3HC Expansion looses Connection:

@developeralgo222 and just to be sure, termination only happens on the last 3HC in the chain?

Yes

@infiniteloop said in Duet 3HC Expansion looses Connection:

@developeralgo222

Decided to retest the isolated boards (Test bench setup )

Thank you for the tests. Looks like some meters of CAN more or less make a difference - that’s not OK at all. Could you please run two quick tests on the bench, both starting with the setup as on the photo:

1. physically swap 3HC boards #1 and #2 in the CAN chain, take the 15m cable to link the 6XD with 3HC2 (chaining 6XD -> 3HC2 -> 3HC1 -> 3HC3 -> 3HC4). No change of IDs. This is to see whether a different CAN port on at least one end of the connection with the 6XD makes a difference or not.

TEST 1

• Same Test with 0.5m and 4m Works OK, Syncs and No errors
• Same Test with 15m Kenable ADSL 2+ cable Does Not Work . Just reconnected errors and CAN timeout errors

......
1/28/2024, 6:08:17 PM	Error: Expansion board 3 reconnected
1/28/2024, 6:08:15 PM	Error: Expansion board 4 reconnected
.....
...
1/28/2024, 6:11:03 PM	

M122 B0

=== Diagnostics ===
RepRapFirmware for Duet 3 MB6XD version 3.5.0-rc.2 (2023-12-14 10:33:00) running on Duet 3 MB6XD v1.01 or later (standalone mode)
Board ID: 0JD2M-999AL-D25S0-7J9DA-3SJ6S-T43V2
Used output buffers: 1 of 40 (29 max)
=== RTOS ===
Static ram: 153284
Dynamic ram: 117412 of which 0 recycled
Never used RAM 72440, free system stack 204 words
Tasks: NETWORK(1,ready,29.1%,172) ETHERNET(5,nWait,0.1%,323) HEAT(3,nWait,0.0%,369) Move(4,nWait,0.0%,340) CanReceiv(6,nWait,0.0%,795) CanSender(5,nWait,0.0%,334) CanClock(7,delaying,0.0%,342) MAIN(1,running,50.4%,444) IDLE(0,ready,20.4%,30), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:05:22 ago, cause: power up
Last software reset at 2024-01-19 15:33, reason: User, Gcodes spinning, available RAM 71300, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
MCU temperature: min 30.5, current 42.7, max 42.9
Supply voltage: min 23.9, current 24.0, max 24.0, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.1, current 12.2, max 12.2, under voltage events: 0
Heap OK, handles allocated/used 99/0, heap memory allocated/used/recyclable 2048/12/12, gc cycles 0
Events: 265 queued, 265 completed
Driver 0: ok
Driver 1: ok
Driver 2: ok
Driver 3: ok
Driver 4: ok
Driver 5: ok
Date/time: 2024-01-28 18:11:00
Slowest loop: 1200.90ms; fastest: 0.07ms
=== Storage ===
Free file entries: 20
SD card 0 detected, interface speed: 25.0MBytes/sec
SD card longest read time 2.8ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, segments created 0, maxWait 0ms, bed compensation in use: none, height map offset 0.000, max steps late 0, ebfmin 0.00, ebfmax 0.00
no step interrupt scheduled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
=== DDARing 0 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== DDARing 1 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks held by null, null
HTTP is ready with "M122 B0" in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
File2 is idle in state(s) 0
Queue2 is idle in state(s) 0
Q0 segments left 0, axes/extruders owned 0x0000000
Code queue 0 is empty
Q1 segments left 0, axes/extruders owned 0x0000000
Code queue 1 is empty
=== CAN ===
Messages queued 1972, received 923, lost 0, errs 12242198, boc 0
Longest wait 0ms for reply type 0, peak Tx sync delay 0, free buffers 50 (min 49), ts 1614/0/0
Tx timeouts 0,0,1613,58,0,298 last cancelled message type 30 dest 127
=== Network ===
Slowest loop: 7.24ms; fastest: 0.03ms
Responder states: MQTT(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8
= Ethernet =
Interface state: active
Error counts: 0 0 0 1 0 0
Socket states: 5 5 2 2 2 0 0 0
=== Multicast handler ===
Responder is inactive, messages received 0, responses 0


1/28/2024, 6:11:03 PM	Error: Expansion board 4 reconnected
1/28/2024, 6:11:00 PM	CAN response timeout: board 4, req type 6024, RID 58
                        Error: Expansion board 4 reconnected
                        Error: Expansion board 4 reconnected
1/28/2024, 6:10:59 PM	M122 B4
.........
.........
                        Error: Expansion board 4 reconnected
1/28/2024, 6:10:58 PM	Error: Expansion board 4 reconnected
............
1/28/2024, 6:10:56 PM	CAN response timeout: board 3, req type 6024, RID 57
                        Error: Expansion board 4 reconnected
                        Error: Expansion board 2 stopped sending status
1/28/2024, 6:10:54 PM	M122 B3
............
............
Error: Expansion board 4 reconnected
1/28/2024, 6:10:53 PM	Error: Expansion board 4 reconnected
......
......
1/28/2024, 6:10:52 PM	CAN response timeout: board 2, req type 6024, RID 56
1/28/2024, 6:10:50 PM	M122 B2
.......
1/28/2024, 6:10:50 PM	Error: Expansion board 4 reconnected
                        Error: Expansion board 4 reconnected
.......
1/28/2024, 6:10:49 PM	Error: Expansion board 2 stopped sending status
......
1/28/2024, 6:10:46 PM	M122 B1
                        CAN response timeout: board 1, req type 6024, RID 55

TEST 2:

2. again starting with the initial arrangement, replace the short cable between 3HC3 and 3HC4 with the 15m one. The result might indicate a problem with either the overall length of the CAN bus, or the position of the long section within the chain of boards.

For both tests, would you mind to post the M122 reports (if available)?

NOTE: i can confirm that we might have an Issue with CAN Bus cable Length . If this can be reproduced by someone else then its bad news.

• Same Test with 0.5m and 4m Works OK, Syncs and No errors
• Same Test with 15m Kenable ADSL 2+ cable Does Not Work ,

Where 6XD-->0.5m-->3HC1 -->0.5m-->3HC2-->0.5m-->3HC3-->15m-->3HC4

• 6XD-->0.5m-->3HC1 -->0.5m-->3HC2-->0.5m-->3HC3 All Sync except 3HC4 Which has 15m kenable ADSL 2+ cable connected between 3HC3 and 3HC4

1/28/2024, 6:34:08 PM	

M122 B4
CAN response timeout: board 4, req type 6024, RID 82


1/28/2024, 6:34:04 PM	

M122 B3
Diagnostics for board 3:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.8 (2023-07-25)
All averaging filters OK
Never used RAM 156832, free system stack 194 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,6.0%,103) MAIN(1,running,92.8%,391) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.2%,263), total 100.0%
Last reset 00:06:57 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 48852, writes 17 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 48853, writes 17 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 48854, writes 17 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -4/13, peak Rx sync delay 182, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.2, current 24.3, max 24.3
V12 voltage: min 12.3, current 12.3, max 12.4
MCU temperature: min 22.6C, current 29.6C, max 29.6C
Last sensors broadcast 0x00000000 found 0 148 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 3382, send timeouts 0, received 2066, lost 0, errs 14241581, boc 0, free buffers 38, min 38, error reg ffff00
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0


1/28/2024, 6:34:01 PM	

M122 B2
Diagnostics for board 2:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.8 (2023-07-25)
All averaging filters OK
Never used RAM 156832, free system stack 194 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,6.0%,103) MAIN(1,running,92.8%,393) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.2%,263), total 100.0%
Last reset 00:06:54 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 38393, writes 17 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 38393, writes 17 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 8.9 steps/mm, standstill, SG min 0, mspos 8, reads 38394, writes 17 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -11/10, peak Rx sync delay 183, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.2, current 24.2, max 24.3
V12 voltage: min 12.3, current 12.3, max 12.4
MCU temperature: min 23.2C, current 30.8C, max 31.0C
Last sensors broadcast 0x00000000 found 0 128 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 3360, send timeouts 0, received 2052, lost 0, errs 14147821, boc 0, free buffers 38, min 38, error reg ffff00
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0


1/28/2024, 6:33:59 PM	

M122 B1
Diagnostics for board 1:
Duet EXP3HC rev 1.02 or later firmware version 3.5.0-rc.2 (2023-12-14 08:56:47)
Bootloader ID: SAME5x bootloader version 2.8 (2023-07-25)
All averaging filters OK
Never used RAM 156904, free system stack 194 words
Tasks: Move(3,nWait,0.0%,182) HEAT(2,nWait,0.0%,120) CanAsync(5,nWait,0.0%,67) CanRecv(3,nWait,0.0%,80) CanClock(5,nWait,0.0%,70) TMC(2,nWait,6.0%,103) MAIN(1,running,92.8%,413) IDLE(0,ready,0.0%,39) AIN(2,delaying,1.2%,263), total 100.0%
Last reset 00:06:52 ago, cause: power up
Last software reset data not available
Driver 0: pos 0, 20.0 steps/mm, standstill, SG min 0, mspos 8, reads 28357, writes 17 timeouts 0, steps req 0 done 0
Driver 1: pos 0, 20.0 steps/mm, standstill, SG min 0, mspos 8, reads 28357, writes 17 timeouts 0, steps req 0 done 0
Driver 2: pos 0, 20.0 steps/mm, standstill, SG min 0, mspos 8, reads 28358, writes 17 timeouts 0, steps req 0 done 0
Moves scheduled 0, completed 0, in progress 0, hiccups 0, segs 0, step errors 0, maxLate 0 maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0, ebfmin 0.00 max 0.00
Peak sync jitter -5/15, peak Rx sync delay 180, resyncs 0/0, no timer interrupt scheduled
VIN voltage: min 24.1, current 24.1, max 24.2
V12 voltage: min 12.4, current 12.4, max 12.4
MCU temperature: min 20.5C, current 26.3C, max 26.3C
Last sensors broadcast 0x00000000 found 0 16 ticks ago, 0 ordering errs, loop time 0
CAN messages queued 3343, send timeouts 0, received 2042, lost 0, errs 14059073, boc 0, free buffers 38, min 38, error reg ffff00
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 0


1/28/2024, 6:33:56 PM	

M122 B0
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6XD version 3.5.0-rc.2 (2023-12-14 10:33:00) running on Duet 3 MB6XD v1.01 or later (standalone mode)
Board ID: 0JD2M-999AL-D25S0-7J9DA-3SJ6S-T43V2
Used output buffers: 1 of 40 (29 max)
=== RTOS ===
Static ram: 153284
Dynamic ram: 117916 of which 0 recycled
Never used RAM 71936, free system stack 202 words
Tasks: NETWORK(1,ready,35.2%,172) ETHERNET(5,nWait,0.1%,317) HEAT(3,nWait,0.0%,369) Move(4,nWait,0.0%,340) CanReceiv(6,nWait,0.0%,797) CanSender(5,nWait,0.0%,334) CanClock(7,delaying,0.0%,350) MAIN(1,running,64.4%,444) IDLE(0,ready,0.3%,30), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:06:49 ago, cause: power up
Last software reset at 2024-01-19 15:33, reason: User, Gcodes spinning, available RAM 71300, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
MCU temperature: min 28.3, current 42.7, max 42.7
Supply voltage: min 24.0, current 24.0, max 24.1, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.1, current 12.2, max 12.2, under voltage events: 0
Heap OK, handles allocated/used 99/0, heap memory allocated/used/recyclable 2048/12/12, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: ok
Driver 1: ok
Driver 2: ok
Driver 3: ok
Driver 4: ok
Driver 5: ok
Date/time: 2024-01-28 18:33:55
Slowest loop: 5.37ms; fastest: 0.07ms
=== Storage ===
Free file entries: 20
SD card 0 detected, interface speed: 25.0MBytes/sec
SD card longest read time 2.3ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, segments created 0, maxWait 0ms, bed compensation in use: none, height map offset 0.000, max steps late 0, ebfmin 0.00, ebfmax 0.00
no step interrupt scheduled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
=== DDARing 0 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== DDARing 1 ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Movement locks held by null, null
HTTP is ready with "M122 B0" in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
File2 is idle in state(s) 0
Queue2 is idle in state(s) 0
Q0 segments left 0, axes/extruders owned 0x0000000
Code queue 0 is empty
Q1 segments left 0, axes/extruders owned 0x0000000
Code queue 1 is empty
=== CAN ===
Messages queued 2108, received 9884, lost 0, errs 13969212, boc 96
Longest wait 30ms for reply type 6018, peak Tx sync delay 1586, free buffers 50 (min 49), ts 2047/1998/0
Tx timeouts 0,0,0,0,0,0
=== Network ===
Slowest loop: 7.36ms; fastest: 0.03ms
Responder states: MQTT(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8
= Ethernet =
Interface state: active
Error counts: 0 0 0 0 0 0
Socket states: 5 2 2 2 2 0 0 0
=== Multicast handler ===
Responder is inactive, messages received 0, responses 0

I think further Testing with different Length using TEST 1 and 2 is required to rule out this issue of cable length. I have tried several self-made CAN Bus cables with different lengths around 4m to 5m and some work but some don't , i am assuming that my Network Cable craftmanship might not be the top notch ( BTW, i have always terminated all my own Network cables for over 25 years as an engineer). I assumed that Kenable ADSL 2+ cables should work in this case to rule out if its my cable termination work.

@gloomyandy said in Duet 3HC Expansion looses Connection:

@developeralgo222 Just to clarify, when you are using the boards individually are you enabling the termination resistors on the 3HC boards that is being tested?

Yes , Each 3HC board is CAN Bus terminated when testing individually.