#1
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ModBus 101
It has come the time for me to have a go at the ModBus thingy in Mach3.
Done my Google on the subject & hours of staring at the screen reading documents written in Sanskrit... Would most appreciate if anyone could give me a jump start by explaining the followings terms in plain English? Coil Descrete Input Holding Reg Input Reg Single Coil Single Reg Million thanks in advance. |
#2
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i have made a modbus,
coil its output like relays or other on off thing. discrete input can be 0 or 5v input depends on the electronics. on off thing. Holding Reg can have a value of 0 to 255 . usefull for pwm of control vfd driver Input Reg its a 0-255 input. like potentiometer or voltage reading. on mach3 this uses brains control. you have some videos here http://www.machsupport.com/videos.php i have this controller 7 relays 10 digital inputs 1 pwm output 1 mpg input 3 analogical input. works on serial rs232 i have some interference problems that i have to fix. beside that works great. on the web you can find network modules, serial, rs485. all work the same. |
#3
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Hi Fernanda,
Thanks for the heads up. Helps a lot! Q's When you say pwm out put, do you mean frequency output or Analog Voltage using PWM. |
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