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Post by Mitch on Sept 5, 2015 2:07:24 GMT
I ran autotune again on all 6 motors and got the following:
H030: 2.349 Ohm H031: 0.976 Ohm H032: 19.01 mH H034 0.009 kg m2 (above are an example from one of the VFD's - the value in the attached images might not match exactly - but they're close) I noticed that the autotune parameters did not show when I report what parameters are changed (see image) So I had to manually update H030 through H034. Again I could not complete the autotune with motion successfully, it would rotate, but I would always get a fail indication at the end.
I set the following parameters:
b033 = 5 (its the min setting for cable length) b083 = 12 (Carrier freq.) b090 = 0.9 (DC braking %, 1 is 100%) F002 = 0.5 F003 = 0.5 A001 = 01 (Frequency source = Control terminal) A002 = 01 (Run command = Control terminal) A044 = 03 (Sensorless Vector mode) A051 = 01 (DC braking enabled at stop) H002 = (Use autotune settings) H003 = 0.55kW
(see attached pictures for details)It moves reasonably well, but I still get error codes which stop the VFD.
E02.8 (E02 = Over current event during deceleration)
E03.4 (E03 = Over current event during acceleration)
-Mitch
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Post by Mitch on Sept 5, 2015 2:08:26 GMT
Attached some more images (3 image limit) Notice in this parameter comparison (image) set vs default, it does not show the correct autotuned settings for H030 through H034. I've also included a fault log for one of the VFDs Edit:I see the error events are occurring about 10Hz... I wonder if I should set A062 (low freq. limit) at 11hz... I thought my next action would be to adjust the accel and decel rates down towards 0.1 and enable the b027 over current trip suppression, but it's enabled by default. Other thoughts: Could try setting B036 higher- (reduced voltage start) Also B008 restart on over current trip with freq matching - but this doesn't actually solve the problem. |
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Post by Mitch on Sept 5, 2015 6:45:51 GMT
Update for you before I head to bed.
I adjusted:
F002 Accel and decel back to 0.1
B022 (overload restriction level) set lower to 3A or 60% of VFD rated amperage. Motor FL amps is 2.6A x 1.15
B023 (overload decel rate) set to 0.5
AMC - Set motor speed to 100%
AMC - Set min motor speed to 2
The problem is not fixed, but VFD's now do not fault over current. Movement is now unbearably slow.
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Post by vicpopo on Sept 5, 2015 11:36:42 GMT
If you have overload why didn't you increase the max level.
On my inverter I put this value to 150% form the nominal current.In fact it is the max value possible to setup.
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Post by clyevo on Sept 5, 2015 15:17:21 GMT
Update for you before I head to bed. I adjusted: F002 Accel and decel back to 0.1 B022 (overload restriction level) set lower to 3A or 60% of VFD rated amperage. Motor FL amps is 2.6A x 1.15 B023 (overload decel rate) set to 0.5 AMC - Set motor speed to 100% AMC - Set min motor speed to 2 The problem is not fixed, but VFD's now do not fault over current. Movement is now unbearably slow. It is very slow because you set accel and decel rate too low But did the rotation autotune work at this settings? It doesnt matter if acceleration or deceleration is slow Because all the rotation autotune need is to calculate the current at full load/max rpm But i am not sure your acc/dec rate applies during autotune, during rotation autotune did it accelerate slowly? I agree with vicpopo, maybe you should set the b022 higher than 100% Because i see your error history all overload current at around 90% Maybe if u scared damage the motor keep the motor circuit box open so you can smell and see smoke but i dont think that will happen  Try increase that b022 higher to whatever you feel comfortable and set the acc/dec back to default. Then you can recheck at what current level it got acc/dec error |
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Post by Mitch on Sept 5, 2015 17:23:05 GMT
If you have overload why didn't you increase the max level. On my inverter I put this value to 150% form the nominal current.In fact it is the max value possible to setup. Vicpopo: When I was getting the most trip events, I was set at default 7.5A before - which is too high. The way I understand it, B022 is based on the 'inverter' rated current. It was previously set at the default of 150% (which on the VFD display showed as 7.5A) The inverter is rated for 5A output in CT mode, so 150% is 7.5A. The motor has a full load amperage rating of 2.6A, so I should set B022 to 3.9A (150%), I set it at 3A which is 1.15x the FL amps of the motor. B012 is used for FL protection. The default rate of change that B022 uses to avoid this trip limit is set by B023 - normal 1 second. (I reduced that to 0.5) I have some time today, so i'll be working on this from now until the mid afternoon, I'm going to try increasing F002/F003 accel and decel back to 0.5, and change B022 to 3.9A. Also I will double check B012 is set to 2.6A. (B012 should be set to the FLA rating of motor, B012 is set as a % of inverter rated amperage and will use this value to protect to 115%. I will make sure this is set to 52% or 2.6A) |
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Post by vicpopo on Sept 5, 2015 17:35:57 GMT
Could you Check pls your com port settings!
Baudrate 250000
Latency 4ms
i need also more informations :
-could you remember me what you are testing when overload comes ?
-could you give me what the rated motor speed you use and the gearbox ratio ?
for your information my duration at full load 150% is 2 seconds.I advice you not to decrease this value but increase from 1 s to 2s not to 0,5s.
And finally the overload is maybe due to the moment when the inverter is in regenerative mode .But normally there is an overvoltage failure .if the energy from the inverter can't go to the braking resistor the inverter comes in failure.
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Post by Mitch on Sept 5, 2015 18:47:56 GMT
Could you Check pls your com port settings! Baudrate 250000 Latency 4ms Thanks, checked, it's fine. I have a hard time believing this has anything to do with it, I'm certain it's a motor/VFD issue. |
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Post by Mitch on Sept 5, 2015 19:00:28 GMT
i need also more informations : -could you remember me what you are testing when overload comes ? -could you give me what the rated motor speed you use and the gearbox ratio ? for your information my duration at full load 150% is 2 seconds.I advice you not to decrease this value but increase from 1 s to 2s not to 0,5s. And finally the overload is maybe due to the moment when the inverter is in regenerative mode .But normally there is an overvoltage failure .if the energy from the inverter can't go to the braking resistor the inverter comes in failure. 1. Any time I move the platform using Fabi's software (not a software problem) - usually quick directional changes in heave. 2. I attached a data sheet earlier in the thread if you need details. At 60hz it's 1725rpm. Gearbox is 60:1 worm. 3. Duration at full load is not what that setting is - it's the rate at which it should slow the movement down to prevent reaching that trip limit. I had a quick look through the settings, but i can't find something that does what you mention for over current events. Like a 'time until trip'. edit:I did find a sheet that shows its a function of the B012 setting. (see image) 4. I understand what you're getting at - but it happens on accel and decel. If it was only decel errors, I think what you're saying would be true. Attachments:
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Post by Mitch on Sept 5, 2015 19:01:17 GMT
Update:
I set B022 at 78% (150% of motor FLA) and B012 at 52% (100% of motor FLA)
AMC min motor speed is at 4%
When I heave using Fabi's software, the common error for me is E05.4, which is the code for a trip caused by B012 limit.
I wonder if it has to do with delta vs wye...
Can someone explain the relationship between motor wiring and VFD settings?
As far as I can tell - everything is correct at this point, the only unknown to me is how the delta wiring impacts the parameters I have already entered.
The motor is intended to be wired in wye (star) and I have it wired in delta - does that change any of parameters I have already entered in the VFD?
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Post by vicpopo on Sept 5, 2015 19:42:33 GMT
The wiring star / delta doesn't impact the vfd settings for me.Normally if you wired in delta that is the best way to have the greater motor power.
And if you have an autotune feature in your inverter when you select the torque control mode you have the right motor parameters ( resistor motor , induction value, etc..).
One parameter you can try to reduce to test another set of parameters is the motor speed.
Try to reduce it from,1725 to 1400 rpm .
For me the best result is when the ramp up and ramp down is the minimal as possible eventhough you reduced the max speed.
0,1 ramp up and down with max motor speed to 900 rpm ( 50% in amc if you leave the nominal,speed to 1725 rpm in your inverter) and min speed set in amc to 1%
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Post by Mitch on Sept 5, 2015 20:34:51 GMT
So I'm getting somewhere... After lunch, I re-wired one of my motors to Wye (star), and ran autotune on the WJ200. (see attached image for values) I was even able to run auto tune with motion! And it sounded better... much quieter and smoother and completed with no errors. I'm going to do this for all motors and then see how the motions are with Fabi's software. -Mitch Attachments:
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Post by vicpopo on Sept 5, 2015 20:59:21 GMT
Ok happy for you !
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Post by Mitch on Sept 6, 2015 0:23:00 GMT
Update:
So I spent some more time on it this afternoon, and it's finally moving quite well.
I rewired the motor connections to Wye (star) and ran autotune with motion for all 6 motors.
AMC is set to 90 max motor speed and 2 min,
Accel and Decel on F002 and F003 set to 0.10. I played with 0.5 and 0.25 and 0.1 seems best.
No errors yet, just intermittent electrical crackling noise at the setpoints, which I assume is from the feedback sensor resolution.
Haven't done the PID yet - operating with P=9, I=0, D=0
I had to adjust a couple of sensors at the midpoint to 30 degrees at 2.5V so it would heave in sync.
Hopefully I get some more time to work on it later in the weekend.
-Mitch
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Post by clyevo on Sept 6, 2015 5:35:19 GMT
Update: So I spent some more time on it this afternoon, and it's finally moving quite well. I rewired the motor connections to Wye (star) and ran autotune with motion for all 6 motors. AMC is set to 90 max motor speed and 2 min, Accel and Decel on F002 and F003 set to 0.10. I played with 0.5 and 0.25 and 0.1 seems best. No errors yet, just intermittent electrical crackling noise at the setpoints, which I assume is from the feedback sensor resolution. Haven't done the PID yet - operating with P=9, I=0, D=0 I had to adjust a couple of sensors at the midpoint to 30 degrees at 2.5V so it would heave in sync. Hopefully I get some more time to work on it later in the weekend. -Mitch That must be it, your motor is probably meant for star only connection. You can confirm this with the motor supplier just in case. Because a 230v motor wire in star has much less torque than a motor wired in delta unless the parameter is actually meant to be for 230v in star connection. |
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