Download Tuning the P700VC in Sens Vector and FVC

Tuning the P70EC and P700VC in Sensrls Vector and FVC
Tuning the drive to the motor is extremely important. The purpose of Autotune is to identify
the correct motor flux and stator resistance. This will ensure higher starting torque and better
performance at low speed operation. An improperly tuned drive can cause the motor to exhibit
instability at low speeds, uneven performance load vs. unloaded through the motors speed
range and generate unnecessary faults such as over currents and over voltages etc… The
following pages should at least help if not eliminate the above issues.
Entering the Motor Nameplate Data
Before starting an Autotune, the motor data, contained in Parameters 40- 49, must be entered
exactly as it appears on the motor nameplate. The Autotune relies on this data to create an accurate
model of the motor to tune the drive to the motor during the Autotune process.
Motor Data: (NP=Name Plate), (FLA=Full Load Amps), (OL=Overload), (S.F. =Service Factor)
P40 [Motor Type]
Default is”0 Induction”
P41 [Motor NP1 Volts]
Default is “Based on Drive Rating”
P42 [Motor NP FLA2]
Default is “Based on Drive Rating”
P43 [Motor NP Hertz]
Default is “Based on Drive Catalog Number”
P44 [Motor NP RPM]
Default is “1750 RPM”
P45 [Motor NP Power]
Default is “Based on Drive Rating”
P46 [Mtr NP Pwr Units]
Default is “Based on Drive Rating”
P47 [Motor OL3 Hertz]
Default is “Motor NP HZ/3”
P48 [Motor OL Factor]
Default is”1.00” (is “S.F.”4 on the Motor NP)
P49 [Motor Poles]
Default is”4” poles (1800RPM, 60HZ)
For 60HZ (3600RPM=2 Poles, 1800=4, 1200=6, 900=8) For 50HZ (3000=2, 1500=4, 1000=6, 750=8)
Note:
If you ever get F12 Overcurrents as soon as start is pressed - Then set P47 [Motor OL Hertz].
Next complete the Following:
Direction test, Rotate or Static tune (No Load–Use P61) and Inertia Autotune (Fully Loaded–Use P67).
If this is the 1st time start-up and 1st time doing an autotune with parameters at factory default then go
to Step A. If not then go to Step B (help finish Step A) or Step C (Inertia Tuning with P67).
Once you have successfully completed a Static Tune or Rotate Tune then go to Step C
1
(P53 must be set to one of these “0 Sensrls Vect” or “4 FVC”)
Step A
Note :> The Static Tune and the Rotate Tune both should take less than 25 sec to finish.
1.) [Direction Test] is simply bump the motor using jog and check that the motor is turning in the
Correct direction. If not power down and swap any 2 motor leads at U, V, and W then power up
again. (The encoder should not be connected or P80 is set to “0 Open Loop”)
Note: > When the drive is going in the correct direction then, the encoder can be connected. Make
sure it’s still going in the same direction. If not, then it’s something with the encoder.
2.) [Rotate Tune] If you can rotate the motor with no load then set P61 to “2 Rotate Tune” and
Press start - (the gearbox can still be connected)
3.) [Static Tune] If you can’t rotate the motor with no load then set P61 to “1 Static Tune” and
Press start
Note :> Setting P61 to either “1 Static Tune” or “2 Rotate Tune” - Pressing start and allowing the tune
to finish P61will then change to “0 Ready” this is supposed to happen and can be left at zero.
4.) If the Static Tune or Rotate Tune finished properly then go to Step C. If not then go to Step B
General rule of thumb for what values are good in parameters P62 and P63
[When using P61 to Start and complete the autotune with (No Load on the motor)]
P62 [IR Voltage Drop] for all HP’s typically is between (0-10volts)
(The Voltage value is read @ zero speed)
If tuning is complete and the voltage is higher than 10Volts make sure P61 is at a value of
“0 Ready” then set P62 to a value of 10Volts. If P88 is set to a anything other than “1 Speed Reg”
mode then just leave P62 set to whatever the tuning set it to.
For 5HP and less P63 is typically (½) of the motors name plate FLA.
(The current value is read @45HZ) P63 [Flux Current Ref] is the value of Amps for full motor flux.
For 7.5HP and higher the value for P63 runs between 20-30% of the motor name plate FLA
(Typically it’s closer to 30%) (The current value is read @45HZ)
P63 [Flux Current Ref] is the value of Amps for full motor flux.
P64 [Ixo Voltage Drop] is the voltage drop across the leakage inductance of the motor at rated motor
current. Typical values range is (80-180)
(The setting of P53 to “0 Sensrls Vect” or “4 FVC” and running the “Rotate Tune” or the
“Static Tune” will automatically change the values in -P62, P63 and P64
If tuning never works then see page 4.
2
Step B Check these Parameters ;(P61, P62, P63, and P64) – (P67, P445, P446, P449, and P450) –
Some of these parameters may need to be adjusted manually. Somehow they got set incorrectly.
These values can cause the tuning to fail or not run properly. See Step A or Step C Refer to the
General rule of thumb area to see the proper settings for the parameters listed above. Make the
proper adjustments then go through Step A or Step C again. If Step A, Step B and Step C fail to
help with tuning - then reset defaults with P197 and cycle power. Start Step A or Step C again.
Step C
(Make sure you have completed the Static Tune or Rotate Tune before doing the Inertia Tune)
Note :> the Inertia tune with P67 will try and run the motor up to 60HZ as fast as it can per the
parameter settings and the load. When the Inertia Tune has completed -Then the time it took to
accelerate to 60HZ (in seconds) is entered into P450 [Total Inertia]
(Make sure the application/machine can handle the motor running to 60HZ quickly) –
(The Inertia Tune should take less than 35 sec)
1.) Set P449 [Speed Desired BW] to a value of 20 before running the Inertia Tune with P67
2.) (P53= “4 FVC”) - (Then typically P66 [Autotune Torque] needs to be increased to a higher value.
Typical is 100 it may need to be set higher
3.) Set P67 to “1 Inertia Tune” and then press start
Note :> Setting P67 to “1 Inertia Tune”, Pressing start and allowing the tune to finish P67 will then
change to “0 Ready” this is supposed to happen and can be left at zero.
(Start with low values and slowly increase the value to meet your application needs when setting
P449 [Speed Desired BW] and P450 [Total Inertia])
General rule of thumb for what values are good in parameters P449 and P450
[When using P67 to Start and complete the autotune with the motor (Fully loaded)]
(These settings are application dependent -they can be higher or lower)
A good place to start with P449 is a value range of 12 – 40 Radians/Sec
A good place to start with P450 is a value range of 0.10 – 3 Sec
Note :> to make any manual changes to P450 you must first set P67 to “0 Ready” – (Default)
When you enter a value in P449 [Speed Desired BW] it automatically enters a value in P445 [Ki Speed Loop] and P446 [Kp Speed Loop]. Setting P449 to a value of Zero will allow you to
manually change P445 and P446
P449/450 can change drastically depending on the application Load and whether there is any kind of
mechanical advantage like a Gear box or belt and pulleys.
Note :> to make any manual changes to P445 and P446 you must set P449 to zero (Typically set
P445 to zero then slowly bring up P446 to desired level then slowly bring up P445 to desired level)
If tuning never works then see page 4.
3
If tuning never works see information below
If you used the “Start-Up” menu - then after completing the autotunes you may need to –
Check the following parameters P53 [Motor Cntl Sel], P80 [Feedback Select], the Digital Inputs 1-6/
(P361-366), P276 [Logic Mask], P277 [Start Mask] and P278 [Jog Mask] - they don’t get set back to
their original settings - if you get out of the start-up procedure without doing a proper abort. Or go
back into the “Start-Up and then abort properly.
Check Output Current on phases U, V and W. (With a clamp-on meter)(Verifying that phases U, V and W are balanced).
If unbalanced then (with AC Power OFF) rotate the motor wires. Move U to V, V to W and W to U.
then Apply AC Power again check with a clamp-on meter. If the odd one out follows the motor wires/
(moves to a different phase) then the motor is bad. If it’s the same phase then the drive is bad.
Example:
With a clamp on meter U measures 10amps, V measures 2amps and W measures 10amps – the odd
one out is V at 2amps. Then turn OFF the AC Power and rotate the motor wires Moving U to V, V to
W and W to U. after applying AC Power again check with a clamp-on meter. If W is now at 2amps
and U and V are both 10amps then the motor is bad.
If after Moving U to V, V to W and W to U. and AC Power is reapplied - then again check with a
clamp-on meter and if V is still at 2amps then the drive is bad.
Note :> (Do this before replacing the bad drive)
If the condition is that the drive is bad we then recommend disconnecting the motor leads at U, V and
W and meggar the motor at 1000Volts to check condition of the motor windings.
Check Output Voltage at U, V and W. (With a Volt meter AC setting).
This can be done with the motor wires disconnected at U, V and W- then run the drive at 60HZ and
measure U, V and W Phase to Phase it should be close to what the input voltage is.
Also check Phase to Ground which should be the same as the AC input voltage divided by the –
(Square-root of 3 = 1.732).
Example:
On a 460V drive running at 60HZ with no motor connected.
You should measure 460V AC phase to phase – U to V, U to W and V to W.
Phase to ground it should be (AC volts divided by 1.732) example (480v divided by 1.732 or 277V AC)
Check Input Voltage at R/ (L1), S/ (L2) S and T/ (L3). (With a Volt meter AC setting)
(AC power – “based on what is ordered”)
200V - 208V
240V
380V / 400V
480V
600V Frame 0-4
600V/690V Frames 5-6
Check DC Bus Voltage at terminals DC (+) and DC (–). (With a Volt meter DC setting)
The nominal DC bus voltage is as follows;
(AC power– “based on what is ordered”)
200V - 208V
240V
380V / 400V
480V
600V Frame 0-4
600V/690V Frames 5-6
281V DC
324V DC
540V DC
648V DC
810V DC
932V DC
(Nominal DC bus voltage– “based on what is ordered”)
4