Hello,

I noticed some people did use analog inputs with a (modbus) plc (brian? )
I am planning to use a modbus (coupler or plc). How does this work exactly.
I did check out the wiki pages on modbus, but it's not all clear to me.
If my analog modules are 8 bits, do i lose 8 oemtrigger inputs  or so?
are is it better to use direct access in scripting.
What i want to do is use an hall efect 3 axis joystick for jogging.
any hints?

Thanks,
Kris

To get the data from the analog input you look at the input register. So an analog register is read by Mach3 and is stored by Mach 3 till the next time mach3 reads the register. To get the data from the register you do the following:

 Getinput(64)

64 is the first register that you can use for an analog input register.

If it is an 32bit or 8 bit analog is going to change the max valuse that you get from the analog input...

hope that helps

Hello Brian,
Yes this helps, thank you.
Altough i'm not completely shure of what to do when more analog values are needed.
Say it was an 8-bit register, do i need to reed input 72 (=64+8) for the next value,
are does this mapping settings in modbus setup make it so that i need to read input 65
that is what i think actually.

Kris.

each register is a holding register when you are doing analog. So for a DL05 PLC I know that 10V is 4096 and 0V is 0... so any voltage in that range will be a value in register 64 from 0 - 4096. If you had two analog inputs register 64 & register 65 would have values from 0 - 4096... As you can see it only takes one register to get one analog channel .

Ok, thank you
I was guessing it would be that way
greetings