Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: adryan on December 13, 2007, 12:41:53 PM
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Hi,
anyone got an Idea if it's possible to display the analog output signal of my VFD in the mach screen? (Amp measurement of the VFD)
This way you can have a cool "spindle load meter" on the screen!
regards,
Adryan
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Does the VFD have modbus - If so I am sure you could do it.
KTM
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KTM is exactly right. :)
Brett
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Att: KTM
I wouldn't know....
I've connected the ABB VFD to my PC using an opto isolated LPT card. Speed is controlled with a index signal.
On my VFD I have a mA signal on the analog output witch corresponds to the drawn Amps by the spindle motor.
I'm not sure how to (if it is possible) bring this signal back to my pc and display it in Mach3
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I am not so familiar with ABB products. Does your VFD have a comm port. Most VFD's have a RS485 port.
If it does - the check the manual to see if your VFD supports modbus.
The other option is to a modbus plc with an analog input card.
KTM
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just spend 2 hours reading what Modus is...
I can say that I don't have one! sure want one!
On the VFD is no RS485 , so the only think to do using a modbus with analog input card.
a pitty.. I have 3 LPT ports in my PC I can use, and still have left over inputs, which it would be so simple I could just use one of those
Adryan
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well if you can spend a little money, get your self a DL05 PLC about 100 bucks, and get an Analog input card prices range from 50-150 bucks depending on how many chanels, they can do voltage or current. then you can convert the signal to a modbus that mach can read ansd displya
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came acrosse this thread searching for spindle load via mach 3.
my inverter has a rs485 connection i believe. it is just 2 terminals labelled A and B in the middle of the io list.
i know sweet FA about modbus but happy to learn. is this something i can work with?