Spindle Analog Voltage Output not working after update to 3.37

S

scacob

scacob
Hello fellow MASSO users

After updating to 3.37 my VFD would only run at the minimum speed I have set. I checked the analog output of the MASSO and it is reading zero no matter what speed command is issued. This is true both via programs and directly issued MDI M3 and S commands.

I verified the VFD is working correctly by disconnecting from the MASSO and inputting a controlled voltage signal.

Has anyone else had this exact issue?

Serial 1497, V3.37, Core 1.26

VFD Lenze Type ESV222N02YXB

http://download.lenze.com/TD/ESV__SMV frequency inverter__v21-0__EN.pdf
 
S

scacob

scacob
I found the problem.

Not sure what happened but let the smoke out this little guy.
 

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masso-support

masso-support

MASSO Support
Staff member
that's not looking good, looks like the 24v or some other high voltage from the VFD was connected to the 0-10v output on the MASSO
 
S

scacob

scacob
@masso Yes - Everything else seems to be working. I can't figure out what happened because this has been hooked up since last December the same way. It definitely did not have any other voltage source connected to the spindle analog output. There is a dedicated cable that goes from the MASSO to the VFD. The connections are clean no shorts, no other voltage sources around. All I did was update to 3.37 and was testing it out to verify it was safe to use but kept having issues with my keyboard and mouse dropping connectivity. This was sorted out by removing a USB extension cable (not sure why that was suddenly an issue). I was trying to verify a program would run clean with the new update so I was running it with no tool in the air. I was starting and stopping the program with the feed hold and noticed that the spindle would slow way down but not stop when I would press feed hold and speed back up when I resumed this was different behavior from what I recalled. Then one time I resumed and it didn't speed back up. It turns out that the slow speed is the lowest speed allowable I have programmed into my VFD. I am therefore concluding that when I was pressing feed hold the MASSO was dropping the analog output but continuing to transmit the direction signal to the drive keeping it in the run state. I am sure most people don't press feedhold as frequently as I was doing during this test run. Please test this out on your test bed to verify MASSO behavior. Is there a US site that does repairs or can you provide the part number for the 0-10v output chip so I can get it repaired locally? I would rather not be down for an extended period for this.
 
masso-support

masso-support

MASSO Support
Staff member
its great that everything else is working good. Pressing feedhold or anything else can't trigger this as the output from MASSO is very low current and can't cause this much damage, some how very high voltage came from the VFD to MASSO.

Can you please share the wiring diagram on how you have wired the VFD.

Please also clean the board with some circuit board cleaning alcohol and send us the photos so that we can provide you with the part numbers of the components.
 
S

scacob

scacob
It is wired as your diagram posted on documentation. I have attached that as reference and a photo of the cleaned board. It appears some of the board coating has been baked loose.

I think it is just the 0-10 chip and perhaps the component to the right of it in the photo.
 

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masso-support

masso-support

MASSO Support
Staff member
@scacob we will email you the component numbers today, it will also be a good idea to change the components around the chip as the board has taken a lot of damage. Please also keep in mind that the tracks on the PCB might come of when desoldering the chip as the board has suffered a lot of damage, so please watch the tracks when removing the components.
 
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