bdring
Problem: Alarm when i use control pins
Wiki Search Terms
control pins Alarm 11
Controller Board
Custom board
Machine Description
DM542, VFD,...
Input Circuits
-Probe/reset/start/hold on R/C filters, internal pullups activated
-Endstops on TLP521 optocouplers
Configuration file
name: CNC V3 VFD XYYZ
stepping:
engine: I2S_STREAM
idle_ms: 250
pulse_us: 4
dir_delay_us: 0
disable_delay_us: 0
start:
must_home: false
check_limits: true
axes:
x:
steps_per_mm: 200
max_rate_mm_per_min: 2500
acceleration_mm_per_sec2: 50
max_travel_mm: 700
homing:
cycle: -1
positive_direction: false
motor0:
limit_all_pin: gpio.36
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
hard_limits: true
pulloff_mm: 1
standard_stepper:
step_pin: i2so.3
direction_pin: i2so.2
disable_pin: i2so.1
y:
steps_per_mm: 200
max_rate_mm_per_min: 2500
acceleration_mm_per_sec2: 50
max_travel_mm: 700
homing:
cycle: -1
positive_direction: false
motor0:
limit_all_pin: gpio.39
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
hard_limits: true
pulloff_mm: 1
standard_stepper:
step_pin: i2so.6
direction_pin: i2so.5
disable_pin: i2so.4
motor1:
limit_all_pin: NO_PIN
limit_neg_pin: gpio.35
limit_pos_pin: NO_PIN
hard_limits: true
pulloff_mm: 1
standard_stepper:
step_pin: i2so.13
direction_pin: i2so.12
disable_pin: i2so.11
z:
steps_per_mm: 200
max_rate_mm_per_min: 1000
acceleration_mm_per_sec2: 50
max_travel_mm: 150
homing:
cycle: -1
motor0:
limit_all_pin: NO_PIN
limit_neg_pin: NO_PIN
limit_pos_pin: gpio.34
hard_limits: true
pulloff_mm: 1
standard_stepper:
step_pin: i2so.10
direction_pin: i2so.9
disable_pin: i2so.7
i2so:
bck_pin: gpio.22
data_pin: gpio.21
ws_pin: gpio.17
probe:
pin: gpio.27:pu:low
toolsetter_pin: NO_PIN
check_mode_start: false
hard_stop: false
spi:
miso_pin: gpio.19
mosi_pin: gpio.23
sck_pin: gpio.18
sdcard:
card_detect_pin: NO_PIN
cs_pin: gpio.5
10V:
forward_pin: gpio.15
reverse_pin: gpio.4
pwm_hz: 5000
output_pin: gpio.2
enable_pin: NO_PIN
direction_pin: NO_PIN
disable_with_s0: false
s0_with_disable: true
spinup_ms: 0
spindown_ms: 0
tool_num: 0
speed_map: 0=0.000% 1000=0.000% 24000=100.000%
off_on_alarm: false
Laser:
tool_num: 1
output_pin: gpio.14
coolant:
flood_pin: I2SO.8
mist_pin: NO_PIN
delay_ms: 0
control:
reset_pin: gpio.26:pu:low
feed_hold_pin: gpio.33:pu:low
cycle_start_pin: gpio.25:pu:low
Startup Messages
[MSG:INFO: uart_channel0 created]
[MSG:RST]
[MSG:INFO: FluidNC v3.9.8 https://github.com/bdring/FluidNC]
[MSG:INFO: Compiled with ESP32 SDK:v4.4.7-dirty]
[MSG:INFO: Local filesystem type is littlefs]
[MSG:INFO: Configuration file:CNCV3_VFD_XYYZ412.yaml]
[MSG:INFO: Machine CNC V3 VFD XYYZ]
[MSG:INFO: Board None]
[MSG:INFO: I2SO BCK:gpio.22 WS:gpio.17 DATA:gpio.21Min Pulse:2us]
[MSG:INFO: SPI SCK:gpio.18 MOSI:gpio.23 MISO:gpio.19]
[MSG:INFO: SD Card cs_pin:gpio.5 detect:NO_PIN freq:8000000]
[MSG:INFO: Stepping:I2S_STREAM Pulse:4us Dsbl Delay:0us Dir Delay:0us Idle Delay:250ms]
[MSG:INFO: Axis count 3]
[MSG:INFO: Axis X (0.000,700.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.3 Dir:I2SO.2 Disable:I2SO.1]
[MSG:INFO: All Limit gpio.36]
[MSG:INFO: Axis Y (0.000,700.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.6 Dir:I2SO.5 Disable:I2SO.4]
[MSG:INFO: All Limit gpio.39]
[MSG:INFO: Motor1]
[MSG:INFO: standard_stepper Step:I2SO.13 Dir:I2SO.12 Disable:I2SO.11]
[MSG:INFO: Neg Limit gpio.35]
[MSG:INFO: Axis Z (-150.000,0.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.10 Dir:I2SO.9 Disable:I2SO.7]
[MSG:INFO: Pos Limit gpio.34]
[MSG:INFO: reset_pin gpio.26:low:pu]
[MSG:INFO: feed_hold_pin gpio.33:low:pu]
[MSG:INFO: cycle_start_pin gpio.25:low:pu]
[MSG:INFO: Kinematic system: Cartesian]
[MSG:INFO: STA SSID is not set]
[MSG:INFO: AP SSID FluidNC IP 192.168.0.1 mask 255.255.255.0 channel 1]
[MSG:INFO: AP started]
[MSG:INFO: WiFi on]
[MSG:INFO: Captive Portal Started]
[MSG:INFO: HTTP started on port 80]
[MSG:INFO: Telnet started on port 23]
[MSG:INFO: 10V Spindle Ena:NO_PIN Out:gpio.2 Dir:NO_PIN Fwd:gpio.15 Rev:gpio.4 Freq:5000Hz Period:8191]
[MSG:INFO: Laser Ena:NO_PIN Out:gpio.14 Freq:5000Hz Period:8191]
[MSG:INFO: Flood coolant I2SO.8]
[MSG:INFO: Probe gpio.27:low:pu]
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
[MSG:ERR: reset_pin is active at startup]
[MSG:ERR: cycle_start_pin is active at startup]
[MSG:INFO: ALARM: Control Pin Initially On]
ALARM:11
ok
[VER:3.9 FluidNC v3.9.8:]
[OPT:PHS]
[MSG:Machine: CNC V3 VFD XYYZ]
[MSG:Mode=AP:SSID=FluidNC:IP=192.168.0.1:MAC=4C-C3-82-BE-DE-B1]
ok
User Interface Software
No response
What happened?
Hi, At startup, i get this message: [MSG:ERR: reset_pin is active at startup] [MSG:ERR: cycle_start_pin is active at startup] [MSG:INFO: ALARM: Control Pin Initially On] ALARM:11 my control pins and probe are mounted with R/C filters If i desactivate the alarm, i get the same alarm when i push on the reset switch If i put reset button on the optocoupler circuit instead of a limit switch, i don't get Alarm at startup, but i still get the same alarm when i touch the reset button. I use this board for 4 years with "GRBL esp32" with no problem, i only get this problem since i installed FluidNC. All my switches work well in the "calibrate" section of the FluidNC installer . I tried with another ESP vroom32, with older FluidNC version, same result. Thank for your help ;)
GCode File
No response
Other Information
No response
You have a switch that is active at startup. All switches except for the door switch should be momentary that activate when pushed.
You can see what is active with the ? command.
Change the :low to :high in the switch config values.
http://wiki.fluidnc.com/en/config/control#initial-state
Thanks for fast reply, I would love that would be so simple ! here my ? command: <Idle|MPos:0.000,0.000,0.000|FS:0,0|WCO:0.000,0.000,0.000> if i define :high, all switches are trigered ! :low is a good configuration
Sometimes i don't get Alarm at startup, i get IDLE but when i touch reset switch, even few minutes after startup, i get: [MSG:ERR: reset_pin is active at startup] [MSG:INFO: ALARM: Control Pin Initially On] ALARM:11
Are you using external pullups on the control pins, or depending on the internal pullups? If you are using the internal pullups, the RC time constant could be quite long. What is the filter capacitor value?
Hi Mitch, Yes i'm using internal pullups on control pins I'm using a R/C filter (low pass) with a 100R resistors and 100nf capacitors.
here's my old config that worked well in GRBL ESP32
// Inverts pin logic of the control command pins based on a mask. This essentially means you can use
// normally-closed switches on the specified pins, rather than the default normally-open switches.
// The mask order is ...
// Macro3 | Macro2 | Macro 1| Macr0 |Cycle Start | Feed Hold | Reset | Safety Door
// For example B1101 will invert the function of the Reset pin.
#define INVERT_CONTROL_PIN_MASK B00001111
#define ENABLE_CONTROL_SW_DEBOUNCE // Default disabled. Uncomment to enable.
#define CONTROL_SW_DEBOUNCE_PERIOD 32 // in milliseconds default 32 microseconds
FluidNC has a fixed debounce period of 5 ms. The internal pullup can be as high as 100K, which results in a 10 ms time constant. Using an internal pullup for any signal that is potentially connected to an external device is problematic. Add 10K pullups to your circuit.
I just tested to add 10K pullups instead of internal one, i get the same issue... By the way, when i put reset pin on the opto circuit (who as external 10k pullup), i never get Alarm at startup, but i still get Alarm11 when i trigger reset switch after startup. I'm going to go crazy !
We probably need to special-case the check for reset active on restart.
when i trigger reset switch, i get this:
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
[MSG:ERR: reset_pin is active at startup]
[MSG:INFO: ALARM: Control Pin Initially On]
ALARM:11
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
I think I know what is happening. It will take me awhile to fix it because I am working on something else right now.
I did a little testing and the control pins appear to be working as designed.
Try sending the $message/level=debug command. It will show you all switch state changes. This will show you if the state is changing due to noise, etc.
Hi Bart, The startup issue i got cames from noise on R/C entries and FLuidNC who have not the same level of debounce than GRBL ESP32. (i'll redo a new board with all opto entries) I put probe/reset/start/hold on opto entries of my board (instead of endstops) and i don't get any issue at startup, BUT, when i'm triggering the reset switch, i still get the Alarm
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
ok
[MSG:DBG: reset_pin 1]
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
[MSG:ERR: reset_pin is active at startup]
[MSG:DBG: reset_pin 0]
[MSG:INFO: ALARM: Control Pin Initially On]
ALARM:11
A friend with a different board get the same issue when triggering reset_pin, its board has entries with opto+shmidt triggers, external pullups.... well protected ! We only get issue with Reset_pin. No problem with probe,start, hold...
As I said, I think I know the cause of the problem. I just need to find time to fix it. I am doing many other things at the moment.
Hi Bart and Mitch,
I'm the Cyberhornet34's friend. Don't worry Mitch. we red you and understood you are working on many other things at the same time. We'll be patient. So, my post is only for information which could help you and confirm your analisys.
Here is my controller board's schematic.
Here is my config.yaml file.
board: SixDeCNC
name: XYZABC external drivers
meta: (09/01/2025) By HTheatre
arc_tolerance_mm: 0.002
junction_deviation_mm: 0.010
verbose_errors: false
report_inches: false
enable_parking_override_control: false
use_line_numbers: false
start:
must_home: false
deactivate_parking: false
check_limits: true
stepping:
engine: I2S_STREAM
idle_ms: 250
pulse_us: 4
dir_delay_us: 0
disable_delay_us: 0
segments: 12
axes:
shared_stepper_disable_pin: NO_PIN
x:
steps_per_mm: 60.000
max_rate_mm_per_min: 2500.000
acceleration_mm_per_sec2: 80.000
max_travel_mm: 550.000
soft_limits: false
homing:
cycle: 2
allow_single_axis: true
positive_direction: false
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.33:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.1
direction_pin: I2SO.3
step_pin: I2SO.5
y:
steps_per_mm: 60.000
max_rate_mm_per_min: 2500.000
acceleration_mm_per_sec2: 80.000
max_travel_mm: 570.000
soft_limits: false
homing:
cycle: 2
allow_single_axis: true
positive_direction: false
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.32:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.7
direction_pin: I2SO.9
step_pin: I2SO.11
z:
steps_per_mm: 400.000
max_rate_mm_per_min: 1000.000
acceleration_mm_per_sec2: 50.000
max_travel_mm: 100.000
soft_limits: false
homing:
cycle: 1
allow_single_axis: true
positive_direction: true
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.35:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.13
direction_pin: I2SO.14
step_pin: I2SO.15
a:
steps_per_mm: 100.000
max_rate_mm_per_min: 1000.000
acceleration_mm_per_sec2: 80.000
max_travel_mm: 300.000
soft_limits: false
homing:
cycle: 0
allow_single_axis: false
positive_direction: false
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.34:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.0
direction_pin: I2SO.2
step_pin: I2SO.4
b:
steps_per_mm: 100.000
max_rate_mm_per_min: 1000.000
acceleration_mm_per_sec2: 80.000
max_travel_mm: 300.000
soft_limits: false
homing:
cycle: 0
allow_single_axis: false
positive_direction: false
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.39:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.6
direction_pin: I2SO.8
step_pin: I2SO.10
c:
steps_per_mm: 100.000
max_rate_mm_per_min: 1000.000
acceleration_mm_per_sec2: 80.000
max_travel_mm: 300.000
soft_limits: false
homing:
cycle: 0
allow_single_axis: false
positive_direction: false
mpos_mm: 0
seek_mm_per_min: 2000.000
feed_mm_per_min: 200.000
settle_ms: 250
seek_scaler: 1.100
feed_scaler: 1.100
motor0:
limit_neg_pin: NO_PIN
limit_pos_pin: NO_PIN
limit_all_pin: gpio.36:low
hard_limits: false
pulloff_mm: 2.000
standard_stepper:
disable_pin: I2SO.12
direction_pin: I2SO.16
step_pin: I2SO.17
i2so:
bck_pin: gpio.22
data_pin: gpio.21
ws_pin: gpio.17
spi:
miso_pin: gpio.19
mosi_pin: gpio.23
sck_pin: gpio.18
sdcard:
cs_pin: gpio.5
card_detect_pin: NO_PIN
control:
safety_door_pin: NO_PIN
reset_pin: gpio.16:low
feed_hold_pin: gpio.4:low
cycle_start_pin: gpio.26:low
macro0_pin: NO_PIN
macro1_pin: NO_PIN
macro2_pin: NO_PIN
macro3_pin: NO_PIN
coolant:
flood_pin: I2SO.19
mist_pin: I2SO.18
delay_ms: 0
probe:
pin: gpio.27
check_mode_start: true
macros:
startup_line0:
startup_line1:
macro0:
macro1:
macro2:
macro3:
# SERVO RC
user_outputs:
analog0_pin: gpio.25
analog1_pin: gpio.12
#analog2_pin: gpio.13
analog2_pin: NO_PIN
#analog3_pin: gpio.15
analog3_pin: NO_PIN
analog0_hz: 50
analog1_hz: 50
analog2_hz: 50
analog3_hz: 50
digital0_pin: I2SO.23
digital1_pin: I2SO.22
digital2_pin: NO_PIN
digital3_pin: NO_PIN
# SPINDLE
10V:
forward_pin: I2SO.20
reverse_pin: I2SO.21
pwm_hz: 2000
output_pin: gpio.2
enable_pin: I2SO.24
direction_pin: NO_PIN
disable_with_s0: false
s0_with_disable: true
spinup_ms: 0
spindown_ms: 0
tool_num: 0
speed_map: 0=0.000% 4999=0.000% 5000=5.000% 5001=10.000% 25000=100.000%
# LASER
Laser:
pwm_hz: 2000
output_pin: gpio.14:low
enable_pin: NO_PIN
disable_with_s0: false
s0_with_disable: true
tool_num: 100
speed_map: 0=0.000% 1000=100.000%
off_on_alarm: true
Here is the start sequence of FluidNC: no error or warning messages. I only have something wrong on the Z endstop entry. I will fix it. This is probably due to a defective endstop switch.
[MSG:INFO: FluidNC v3.9.8 https://github.com/bdring/FluidNC]
[MSG:INFO: Compiled with ESP32 SDK:v4.4.7-dirty]
[MSG:INFO: Local filesystem type is littlefs]
[MSG:INFO: Configuration file:config.yaml]
[MSG:INFO: Machine XYZABC external drivers]
[MSG:INFO: Board SixDeCNC]
[MSG:INFO: I2SO BCK:gpio.22 WS:gpio.17 DATA:gpio.21Min Pulse:2us]
[MSG:INFO: SPI SCK:gpio.18 MOSI:gpio.23 MISO:gpio.19]
[MSG:INFO: SD Card cs_pin:gpio.5 detect:NO_PIN freq:8000000]
[MSG:INFO: Stepping:I2S_STREAM Pulse:4us Dsbl Delay:0us Dir Delay:0us Idle Delay:250ms]
[MSG:INFO: User Digital Output: 0 on Pin:I2SO.23]
[MSG:INFO: User Digital Output: 1 on Pin:I2SO.22]
[MSG:INFO: User Analog Output: 0 on Pin:gpio.25 Freq:50Hz]
[MSG:INFO: User Analog Output: 1 on Pin:gpio.12 Freq:50Hz]
[MSG:INFO: Axis count 6]
[MSG:INFO: Axis X (0.000,550.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.5 Dir:I2SO.3 Disable:I2SO.1]
[MSG:INFO: All Limit gpio.33:low]
[MSG:INFO: Axis Y (0.000,570.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.11 Dir:I2SO.9 Disable:I2SO.7]
[MSG:INFO: All Limit gpio.32:low]
[MSG:INFO: Axis Z (-100.000,0.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.15 Dir:I2SO.14 Disable:I2SO.13]
[MSG:INFO: All Limit gpio.35:low]
[MSG:INFO: Axis A (0.000,300.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.4 Dir:I2SO.2 Disable:I2SO.0]
[MSG:INFO: All Limit gpio.34:low]
[MSG:INFO: Axis B (0.000,300.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.10 Dir:I2SO.8 Disable:I2SO.6]
[MSG:INFO: All Limit gpio.39:low]
[MSG:INFO: Axis C (0.000,300.000)]
[MSG:INFO: Motor0]
[MSG:INFO: standard_stepper Step:I2SO.17 Dir:I2SO.16 Disable:I2SO.12]
[MSG:INFO: All Limit gpio.36:low]
[MSG:INFO: reset_pin gpio.16:low]
[MSG:INFO: feed_hold_pin gpio.4:low]
[MSG:INFO: cycle_start_pin gpio.26:low]
[MSG:INFO: Kinematic system: Cartesian]
[MSG:INFO: STA SSID is not set]
[MSG:INFO: AP SSID FluidNC IP 192.168.0.1 mask 255.255.255.0 channel 1]
[MSG:INFO: AP started]
[MSG:INFO: WiFi on]
[MSG:INFO: Captive Portal Started]
[MSG:INFO: HTTP started on port 80]
[MSG:INFO: Telnet started on port 23]
[MSG:INFO: 10V Spindle Ena:I2SO.24 Out:gpio.2 Dir:NO_PIN Fwd:I2SO.20 Rev:I2SO.21 Freq:2000Hz Period:32767]
[MSG:INFO: Laser Ena:NO_PIN Out:gpio.14:low Freq:2000Hz Period:32767]
[MSG:INFO: Flood coolant I2SO.19]
[MSG:INFO: Mist coolant I2SO.18]
[MSG:INFO: Probe gpio.27]
ok
<Idle|MPos:0.000,0.000,0.000,0.000,0.000,0.000|Bf:15,256|FS:0,0|Pn:Z>
And finally, here is the alarm message I get when I press the RESET button. I use momentary and normally closed switches on all the X, Y, Z, A, B, C (endstops), START and HOLD entries.
[SixDeCNC_schematic.pdf](https://github.com/user-attachments/files/22083805/SixDeCNC_schematic.pdf)
[SixDeCNC_schematic.pdf](https://github.com/user-attachments/files/22083818/SixDeCNC_schematic.pdf)
Grbl 3.9 [FluidNC v3.9.8 (wifi) '$' for help]
$Report/Interval=300
[MSG:WARN:: Active limit switch on Z axis motor 0]
[MSG:ERR: reset_pin is active at startup]
[MSG:INFO: ALARM: Control Pin Initially On]
ALARM:11
ALARM:11
[MSG:INFO: websocket auto report interval set to 300 ms]
ok
<Alarm|MPos:0.000,0.000,0.000,0.000,0.000,0.000|Bf:15,256|FS:0,0|Pn:Z|WCO:0.000,0.000,0.000,0.000,0.000,0.000>
[GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
<Alarm|MPos:0.000,0.000,0.000,0.000,0.000,0.000|Bf:15,256|FS:0,0|Pn:Z|Ov:100,100,100>
Thank you for all the fantastic job you do guys!
Hi Mitch ! I come to get news after 3 weeks. Did you take the time to take a look on the issue when reset button is pressed ? Thank you :)