Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

Calysto
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2 years 9 months ago - 2 years 9 months ago #289984 by Calysto

Replied by Calysto on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

I'm just talking to myself, that helps too :-)

So, it depends on your VFD what kind of read/write types are supported. In my manual there is no paragraph about that, but there is something that looks like it. They are talking about the following functions:

fnct_03_read_holding_registers (03 = 0x03)
fnct_06_write_single_register (06 = 0x06)
fnct_16_write_multiple_registers (16 = 0x10)

So, that's where I have to deal with.
I'm afraid that I need conversions in my HAL-file then....

Last edit: 2 years 9 months ago by Calysto.

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tommylight
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2 years 9 months ago #290002 by tommylight

Replied by tommylight on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

Calysto wrote:
I'm just talking to myself, that helps too

I did read it

I try to read everything, not always possible.

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Calysto
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2 years 9 months ago #290101 by Calysto

Replied by Calysto on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

Maybe I want to much.... I found this on the printnc discord. I guess I have to do it like this.... Although my brain says: that can't be in 2024!!! :-)

Mux-ing and scaling should be done bij mb2hal, but that's my opinion.

Code:

#*******************
#  SPINDLE
#*******************

# Start/Stop -- Command Selector Mux

loadrt mux4 names=mux4.runmode
addf mux4.runmode servo-thread

# bit 0-1 : Stop=0b01, Run=0b10
# bit 2-3 : reserved
# bit 4-5 : Fwd=0b01, Rev=0b10
# Fwd command: 0x0012 -> 18
# Rev command: 0x0022 -> 34
# Stop command: 0x0001 -> 1

setp mux4.runmode.in0 1        # Stop
setp mux4.runmode.in1 34    # Reverse
setp mux4.runmode.in2 1        # Stop
setp mux4.runmode.in3 18    # Forward
net spindle-on        spindle.0.on => mux4.runmode.sel0
net spindle-fwd        spindle.0.forward => mux4.runmode.sel1
net spindle-runmode    mux4.runmode.out => mb2hal.spindle_runmode.command

# Speed

loadrt mult2 names=mult2.speedmult,mult2.fbspeedmult
addf mult2.speedmult servo-thread
addf mult2.fbspeedmult servo-thread

loadrt near
addf near.0 servo-thread

setp mult2.speedmult.in0 100
net spindle-setpoint    spindle.0.speed-out-rps-abs => mult2.speedmult.in1
net spindle-freq    mb2hal.spindle_speed.freq_hz <= mult2.speedmult.out

setp mult2.fbspeedmult.in0 0.6
net spindle-freq-fb    mult2.fbspeedmult.in1 <= mb2hal.spindle_speed_feedback.fb_freq_hz.float
net spindle-speed-fb    <= mult2.fbspeedmult.out

setp near.0.scale 1.01
net spindle-setpoint-rpm    spindle.0.speed-out-abs    => near.0.in1
net spindle-speed-fb        => near.0.in2
net spindle-at-speed    spindle.0.at-speed <= near.0.out

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pawel77
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2 years 9 months ago #290106 by pawel77

Replied by pawel77 on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

Hi Calysto,
before communicating with VFD via Modbus I would buy a simple modbus input/output relay and start practicing modbus and MB2hal.

Do you know if is it possible to position spindle with MS300?

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Calysto
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2 years 9 months ago - 2 years 9 months ago #290193 by Calysto

Replied by Calysto on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

A few days ago I didn't know anything about modbus... now I know much more... The most important thing is that I've learn that not every device supports reading at bit-level, that's why I see people using mux4/enum/weighted_sum.

The Delta MS300 manual says that adres 2000H, bit 0 and1 made high, should make it able to Jog... but I've never used it. I also don't know if that is spindle depended.There is a lot to read about jogging in the manual, but I'll probably never use it

Last edit: 2 years 9 months ago by Calysto.

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Calysto
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2 years 9 months ago #290202 by Calysto

Replied by Calysto on topic Delta MS300 VFD, RS485, RPI4, QTdragon, getting it to work

To make things even more interesting (or difficult :-)

) I will also try Mesa_modbus. I'm not sure if it will work with my 7c80, but there is a serial port on it, it should be on with my firmware. Wil test everything later... my machine is not nearby....

Mesa_modbus config-file I've made so far:

Code:

static const hm2_modbus_chan_descriptor_t channels[] = {
/*  {TYPE,     FUNC, ADDR,   COUNT, pin_name} */
    {HAL_BIT,   3,   0x2000, 6,   "runbits"},
    {HAL_FLOAT, 3,   0x2001, 1,   "freq"},
    {HAL_FLOAT, 6,   0x2106, 1,   "volt"},
    {HAL_FLOAT, 6,   0x210A, 1,   "amp"},
    {HAL_S32,   6,   0x210C, 1,   "rpm-out"},
};

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