I am using mb2hal (modbus) and it exposes a pin `mb2hal.00.00.int` that is an input, the values can be 1, 2, or 5. I need to set the values based on other bit pin:
if spindle.0.forward = true then mb2hal.00.00.in = 1
if spindle.0.reverse = true then mb2hal.00.00.in = 2
if spindle.0.on = false then mb2hal.00.00.in = 5
This way you can net your three spindle signals to the three selections of the mux and you can define your modbus values to the corresponding inputs of the mux.
Yes there is a mux4. But then you will one have 2 selction bits and he needs three. Assuming there is a fourth state where nothing is active otherwise mux4 is doable I would say.
loadusr -Wn modbus mb2hal config=mb2hal-gt.ini
loadrt mux4 count=1
addf mux4.0 servo-thread
# esnure all is stopped! (int and float are add together and the result is sent to modbus)
setp modbus.vfd.command.int 0
setp modbus.vfd.command.float 5
# set the logic of that command to send the vdf
# 5 = stop, 1 = forward, 2 = reverse
setp mux4.0.in0 5
setp mux4.0.in1 1
setp mux4.0.in2 2
setp mux4.0.in3 5
net vfd-cmd1 mux4.0.sel0 <= spindle.0.forward
net vfd-cmd2 mux4.0.sel1 <= spindle.0.reverse
net vfd-command modbus.vfd.command.float <= mux4.0.out
net spindle-speed-fb <= modbus.vfd.status.rotation_speed.float
