Masso to Leeson VFD connections

[westyone]

Hello - I need a bit of help to configure and wire up my Masso to a Leeson SM Vfd. See below.

 

[breezy]

Wiring up the control side of a VFD is fairly straightforward.

You need to connect MASSO pin1 to the 0-10v input of VFD.

And pins 4-7 to the forward/reverse connections of the VFD.

And connect MASSO -ve to VFD common.

So in your case

MASSO pin VFD terminal​

1 5​

5 1​

7 13A​

4 & 6 11​

-ve 2​

You will also need to set VFD parameters as required to make 13A accept reverse signal.

Regards,

Arie.

 

[westyone]

Hello Arie - Thanks for the very sweet instructions but I'm a bit thick. I have tried the combination and no joy. The drive just sits there. I have made a chart of what I did below.

 

[evermech]

@westyone

you will need to adjust some parameters also. Especially parameter 05 set it to 03 which is for 0 to 10v control. You will also need to program min and max rpm ( or hertz ) to get your spindle speeds where you want them. There may also be a parameter to disable the built in key pad interface and set for exterior control method. You will have to carefully read through the parameter list to decide which ones are relevant to your application.

Guy

 

[breezy]

@westyone

The MASSO spindle setting should be VFD not PWM.

Also check the parameters in VFD as Guy suggested.

Regards,

Arie.

 

[westyone]

Please see pic below:

Questions:

1. Why does Masso have both TTL 5 Volt and Opto, (Optically Isolated I assume) for spindle control? None of the VFDs on the "Documents" site use them?
   
2. Why are there 2 sets of pins with the same function designation (Pin 4-5 and Pin 6-7)?
   
3. Pin 4 thru 7 are designated "PWM" output but the Masso spindle software requires you to NOT select that. I am told choose "VFD"?
   

Thanks Guys.

 

[breezy]

Quote from Westyone on August 7, 2019, 4:05 am

Questions:

1. Why does Masso have both TTL 5 Volt and Opto, (Optically Isolated I assume) for spindle control? None of the VFDs on the "Documents" site use them?
   
2. Why are there 2 sets of pins with the same function designation (Pin 4-5 and Pin 6-7)?
   
3. Pin 4 thru 7 are designated "PWM" output but the Masso spindle software requires you to NOT select that. I am told choose "VFD"?
   

1. TTL 5volt is very old technology and most VFD don't have the necessary input pins to use them. Opto outputs are more robust than TTL.
   
2. Each pair of pins are the connections to the opto transistor. So for the transistor to switch you have to supply both +ve & -ve via a load, depending on the internal wiring of the VFD you connect one side to the input pin of the VFD and the other to the VFD common.
   
3. Pins 4-7 are labeled Motor Direction / PWM meaning they're dual purpose outputs. So you can use them as PWM (Pulse Width Modulated) signals if you are connecting them to a PWM driver. But since you have a VFD you want the pin to switch on or off, not switching a variable width pulse which controls the speed of the spindle. You are controlling the speed with the 0-10v signal on pin1.
   

Hope that help you to understand.

Regards,

Arie.

 

[westyone]

Thank you Arie. Most kind of you to take the time to explain that.

I would buy you a beer but I'm on the other side of the plant.

Cheers