PLC not following program set

[robertmee]

Ok thank you very much trying to get our electronics guy to come look at it , he just keeps saying it’s from Germany and just seems like doesn’t know what to look for


I appreciate that guidance I wish I knew how to test it myself with multimeter or I would by now

Steve Bailey outlined it pretty well, calling out the exact terminal numbers on the Drive to measure. That's the only place you need to measure as that holds both the PLC signal 0-10V and the Ouput voltage to the DC Drive. Again, if possible, run multiple spindles at the same speed and have your tech measure:

Incoming AC Voltage to each drive (should be 230VAC)
Incoming Analog 0-10VDC signal from PLC. Could be anywhere between 0 and 10V, but should be consistent across drives if running same speed
Outgoing DC Voltage from Drive to Motor. Could be anywhere from likely 0 to 90VDC, but should be the same across drives

Then when you do a speed change, both the Incoming Analog voltage and the DC Voltage out to the motor should change somewhat proportionally to your new speed.

 

[John Lee]

Steve Bailey outlined it pretty well, calling out the exact terminal numbers on the Drive to measure. That's the only place you need to measure as that holds both the PLC signal 0-10V and the Ouput voltage to the DC Drive. Again, if possible, run multiple spindles at the same speed and have your tech measure:

Incoming AC Voltage to each drive (should be 230VAC)
Incoming Analog 0-10VDC signal from PLC. Could be anywhere between 0 and 10V, but should be consistent across drives if running same speed
Outgoing DC Voltage from Drive to Motor. Could be anywhere from likely 0 to 90VDC, but should be the same across drives

Then when you do a speed change, both the Incoming Analog voltage and the DC Voltage out to the motor should change somewhat proportionally to your new speed.

Ok thanks again I appreciate it

 

[John Lee]

Ok thanks again I appreciate it

Ok thanks again I appreciate it

Hi I tested
All the drives one of them was a 8.7 AC

All the other 5 were 24v and up

And checking at the PLC terminals X3.14 and X3.15 getting 1.31 and 2.64 in DC

 

[robertmee]

Your meter is set up wrong. Black lead should be on COM on your meter.

 

[John Lee]

Your meter is set up wrong. Black lead should be on COM on your meter.

Corrected it

 

[John Lee]

Another issue I see this morning the HMI screen shows 2 of my stations on the programs “times set”

The word “INPUT I1”

I never put that suppose to be a set time

 

[robertmee]

If you are measuring the Voltage on the drive to the motors and the voltage from the PLC, your meter should be on DC, not AC. The only AC voltage is the incoming 230VAC power supply to the drives.

 

[robertmee]

Input 1 means it is waiting in the previous step until an external Input occurs, then in both cases, it appears to turn on spindle 1. In one instance it turns it on at 350 RPM, then turns on 2 and 3 with it at 350 RPM. The other instance, it turns on Spindle 1 at 180 RPM then changes it and turns on 2 and 3 to 350 RPM.

That Input could be an operator pushbutton, or some indication that some cycle has completed.

 

[IO_Rack]

I am in South Jersey how I can find someone to look at it ?

You have a couple of options in your area. Applied Controls in Malvern, PA has a knowledgeable group I've worked with. If they can't send someone out, they'll know a local integrator that could help out.

 

[John Lee]

If you are measuring the Voltage on the drive to the motors and the voltage from the PLC, your meter should be on DC, not AC. The only AC voltage is the incoming 230VAC power supply to the drives.

In DC setting only 1 of the drive Roxy is at .10

 

[robertmee]

What terminals are you measuring that voltage on? That's awfully low across the board.

What is the DC voltage to the motor?

Are all the Spindles running the same speed during this test?

 

[robertmee]

As a reminder, the 0-10V signal should be measured across terminals X2.5 and X2.10

Motor Voltage measured across terminals X3.13 and X3.14

See attachments

 

[John Lee]

What terminals are you measuring that voltage on? That's awfully low across the board.

What is the DC voltage to the motor?

Are all the Spindles running the same speed during this test?

Speed adjusted

 

[robertmee]

That's an Inductive reactor. Why are you measuring voltage there?

 

[John Lee]

That's an Inductive reactor. Why are you measuring voltage there?

Sorry my inexperience , so where would I check underneath ?