DE-STA-CO IM-pAC AC Drive Getting Started Guide - Manual (Page 24)

24 IM-pAC Getting Started Guide
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Step 6 - How to change the symmetrical current value Pr 62.
The new symmetrical current value is calculated by the following method.
Take the value of the maximum current value observed from step 4 and divide it by the
motor rated current value (Pr 06 or the name plate value) and then multiply it by 100.
e.g. XXX = 0.94 / 1.14 x 100 = 83
This means we would like the drive to fault at 83 percent of the motor rated current. We
may want to add a few percent to this to avoid some nuisance trips so we will round this
up to 100.
Press the M button on the key pad. Now, press the \/ button several until the left
parameter value changes to Pr 62. If you happen to go passed Pr 62, then use the /\
key to return to Pr 62. Once you are at the flashing Pr 62, press the M key and the
parameter value on the right 0.0 should start to flash. Press the /\ key several times until
the value of XXX appears [62 XXX.0]. (For our revised calculated example we would
have entered 100 [62 100.0].) Press the M key 2 times to return the display back to the
[ih 0.0]. The drive has now been configured to trip during a current overload. You can
take the drive out of the inhibit state by closing connections B2 and B4.
How to manually recover from an overload.
See the Safety Warning on the first page before starting this step.
You must put the control into inhibit mode by opening B2 and B4.
You must recover from the overload condition by returning the indexer to a dwell
position at a reduced speed. You can reduce the motor speed by either changing Pr 18
or turning the speed pot down if you have one wired.
Press the button on the key pad with the red circle.
Put the control out of inhibit mode by closing B2 and B4. If the index drive does not start,
then send a start signal. Once you are in a dwell position reset the motor preset value
back to its original value or return the speed pot back to its normal setting.
1.25 Drive parameter list for a motor reversing application
Never exceed a value of 165 for the symmetrical current or raise the value of Pr 06 above
the name plate value for the applied voltage.
NOTE
You should have a copy of the data sheet for the indexer application in order to set Pr 18
correctly. You must change Pr 10 (Security Level) to 2 or L3 before you can change
Pr 18, the preset speed. On the data sheet you will find the motor speed for your
application and the motor's rated rpm.
Use the following calculation to determine Pr 18.
Pr 18 = Pr 39 x Motor Speed for Application / Motor Rated RPM
Pr 18 = 60 hz x 1650 rpm / 1750 rpm = 57 hz (round all values up to a whole number)
NOTE