"M950: parameter 'F' too high" - Is there a limit to fan count?

clegg78

@dc42 Is there a limit to how many fans M950 can provision? I see I can get to F11 and after that it throws errors about F12. I didn't see this limit documented anywhere in the Gcode.

Phaedrux

What firmware version are you running?

clegg78

RRF3.01RC12

dc42

On which Duet?

clegg78

Duet2 Ethernet

dc42

Ths current limits for Duet 2 are:

constexpr size_t MaxSensors = 32;

constexpr size_t MaxHeaters = 10;					// The maximum number of heaters in the machine
constexpr size_t MaxMonitorsPerHeater = 3;			// The maximum number of monitors per heater

constexpr size_t MaxBedHeaters = 4;
constexpr size_t MaxChamberHeaters = 4;
constexpr int8_t DefaultBedHeater = 0;
constexpr int8_t DefaultE0Heater = 1;				// Index of the default first extruder heater, used only for the legacy status response

constexpr size_t NumThermistorInputs = 8;
constexpr size_t NumTmcDriversSenseChannels = 2;

constexpr size_t MaxZProbes = 4;
constexpr size_t MaxGpInPorts = 10;
constexpr size_t MaxGpOutPorts = 10;

constexpr size_t MinAxes = 3;						// The minimum and default number of axes
constexpr size_t MaxAxes = 10;						// The maximum number of movement axes in the machine, usually just X, Y and Z
constexpr size_t MaxDriversPerAxis = 5;				// The maximum number of stepper drivers assigned to one axis

constexpr size_t MaxExtruders = 7;					// The maximum number of extruders
constexpr size_t NumDefaultExtruders = 1;			// The number of drivers that we configure as extruders by default

constexpr size_t MaxAxesPlusExtruders = 12;

constexpr size_t MaxHeatersPerTool = 8;
constexpr size_t MaxExtrudersPerTool = 8;

constexpr size_t MaxFans = 12;

constexpr unsigned int MaxTriggers = 16;			// Must be <= 32 because we store a bitmap of pending triggers in a uint32_t

constexpr size_t MaxSpindles = 4;					// Maximum number of configurable spindles

p8blr

@dc42 said in "M950: parameter 'F' too high" - Is there a limit to fan count?:

Ths current limits for Duet 2 are:

constexpr size_t MaxSensors = 32;

constexpr size_t MaxHeaters = 10;					// The maximum number of heaters in the machine
constexpr size_t MaxMonitorsPerHeater = 3;			// The maximum number of monitors per heater

constexpr size_t MaxBedHeaters = 4;
constexpr size_t MaxChamberHeaters = 4;
constexpr int8_t DefaultBedHeater = 0;
constexpr int8_t DefaultE0Heater = 1;				// Index of the default first extruder heater, used only for the legacy status response

constexpr size_t NumThermistorInputs = 8;
constexpr size_t NumTmcDriversSenseChannels = 2;

constexpr size_t MaxZProbes = 4;
constexpr size_t MaxGpInPorts = 10;
constexpr size_t MaxGpOutPorts = 10;

constexpr size_t MinAxes = 3;						// The minimum and default number of axes
constexpr size_t MaxAxes = 10;						// The maximum number of movement axes in the machine, usually just X, Y and Z
constexpr size_t MaxDriversPerAxis = 5;				// The maximum number of stepper drivers assigned to one axis

constexpr size_t MaxExtruders = 7;					// The maximum number of extruders
constexpr size_t NumDefaultExtruders = 1;			// The number of drivers that we configure as extruders by default

constexpr size_t MaxAxesPlusExtruders = 12;

constexpr size_t MaxHeatersPerTool = 8;
constexpr size_t MaxExtrudersPerTool = 8;

constexpr size_t MaxFans = 12;

constexpr unsigned int MaxTriggers = 16;			// Must be <= 32 because we store a bitmap of pending triggers in a uint32_t

constexpr size_t MaxSpindles = 4;					// Maximum number of configurable spindles

Is there still a fan limit in firmware 3.4? I've got a duet 3 printer with several expansion boards and I'm using "fans" to control a lot of devices with relays and I've ran into the error "M950: parameter 'F' too high" on M950 F20.

Phaedrux

@p8blr Can you control them as GPIO instead of as a fan?

https://docs.duet3d.com/User_manual/Reference/Gcodes#m950-create-heater-fan-spindle-or-gpioservo-pin

p8blr

@Phaedrux I can but what object model would I use in my conditional statements such as:

if fans[6].requestedValue != 1
...

Thanks.

edit: state.gpOut[6].pwm worked!