Created Date: March 10,2016

Created by: Program

Thanks for the replies. I found some of the information helpful. After doing some more testing this is what I have found. Hopefully there is enough information for someone to help.

I have set all my devices to use 8bits, Odd, 1 stop bit.

The attached images show my various settings.

The scripts I'm using are as follows. I downloaded these from another post and am not familiar with the nomenclature to identify any problems.

M3

call setmodoutput (0,1)

call setmodoutput (1,1)

call setmodoutput (64,600)

DoSpinCW()

M4

call setmodoutput (0,1)

call setmodoutput (1,0)

call setmodoutput (64,600)

DoSpinCCW()

M5

call setmodoutput (0,0)

call setmodoutput (2,1)

DoSpinStop()

Spindle Speed

rpm = GetRPM()

SetSpinSpeed( rpm )

The following link shows the modbus addresses for the VFD starting at 9.26 (page 5-9 lower right corner)

https://www.automationdirect.com/static/manuals/gs3m/ch5.pdf

If someone can explain to me why I have found a need to drop the first 4 when I enter the address into Mach3 I would appreciate it. When I enter the address as listed I get an "illegal data address " status message.

I also saw another post setting up a GS2 drive where they had also dropped the 4.

http://www.machsupport.com/forum/index.php/topic,27376.0.html

The above has a starting register of 2330 and 2331 I have mine set to 2331 and 2332.

What I have observed. With Starting Registers 2331 and 2332

VFD display on startup: Stop, 0 RPM, Forward

In MDI I enter an M4 command and observe that the vfd displays: 0 RPM, Stop, Reverse

M5: Stop, 0 RPM, Forward

M3: External Fault , Reverse, Stop -----the external fault address is 42334, the next address after direction address

When I enter M5: Stop, Forward, External Fault message

If I enter an s command there is no change.

Now if I change my starting addresses to 2330 and 2331 the following is displayed

M4: Run, Forward, 1765 RPM (this is rpm at 60hz) ---Direction has changed, It's running vs stopped, and RPM is not 0

M5: Stop, Forward, 0 RPM

M3: Run, Reverse, 17 RPM

M4: Run, Forward, 17 RPM

The RPM for M4 will remain 1765 until an M3 command is given then both will be 17 following that command. I have no idea why.

If I give an s command, s600 m4, the vfd displays a message of invalid data.

I hope there is enough information available for people to provide me with some insight into what is going on. And what I can do to fix it.

Thanks

Created Date: March 10,2016

Created by: bcarlton

Modbus references:

The 'first 4 ' is just a memory area identifier for the region called 'holding registers '. These typically are word length registers (not bits) that aren't directly from its own analog input.

In the first Modbus capable (Modicon) PLCs this may very well have had a numeric reference for the address. But now they may as well be a heart, club, diamond and spade as it really isn't a 'number '.

Just read the '4 ' as 'Holding Register ' then the rest of the number. When you create a Modbus request the type of the request implies the same thing as that initial number - so stating it isn't necessary.

But unfortunately it will continue to be confusing.

Created Date: March 11,2016

Created by: Program

No reason for the 65KHz, other then I was testing the machine and wanted to increase my feedrate and needed to increase this due to encoder count.

Currently the VFD is the only thing I have connected to mach3. I'm not powering my controller or any of the servos. I just wanted to test the VFD.

The 'fd ' is an error when I was editing my post and re writing a section, I didn't notice it when I went to post it. It is not in the script.

The 's ' command is the spindle command I enter in mach3 in the MDI section.

For example I entered 's1000 m3 ' hoping to see an output on my VFD of : run, forward, 1000rpm.

Created Date: March 11,2016

Created by: kewakl

The 's ' command is the spindle command I enter in mach3 in the MDI section.

For example I entered 's1000 m3 ' hoping to see an output on my VFD of : run, forward, 1000rpm.

Is 's1000 m3 ' a valid sequence?

I seem to remember that for a called macro to USE a value, you have to pass that value to the param and the macro would have to apply the param.

I don't know about setting a system param such as 's '

And as a note from the Macro programming guide for Mach 3.x

complete with typo's

SpindleSpeed Should modify Spindle Speed, but does not work in all versions. User

SetSpinSpeed() instead.