Configuration - Drive
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9
iControl DC
Drive - Calibration Tab
Offsets Please refer to “Automated Drive Setup Procedure” on page 2-49.
• Current loop integral: Adjust to nullify Current loop integrator offset in the SCR System 12
drive. Adjust after Output DAC, monitoring the SCR-LGA board JP7 jumper.
• Current sensor: Adjust to nullify Current sensor offset in the SCR System 12 drive. Adjust
after Current loop integral, monitoring the SCR-LGA board TP3F test point.
• Zero crossing: This adjustment is used only if zero crossing must be adjusted for ride qual-
ity reasons and the zero crossing trim pot (R376 on the System 12 Drive SCR-LGA board)
does not allow sufficient adjustment. See the following Note.
System 12 Drive trim pot R376 and test point IZO are used to set the “zero crossing” point if
necessary. R376 is set and locked at the factory and should not require adjustment. If, when
adjusting ride quality of the car, you notice a sharp bump when transitioning from acceleration
to steady speed or from steady speed to deceleration, you may need to adjust zero crossing.
• Output DAC: Adjust to nullify the Output offset when adjusting initial System 12 drive out-
puts. Adjust while monitoring SCR-LGA board jumper JP3.
• Input ADC: The Input ADC offset values are determined when the drive setup procedure is
performed (Controller > Setup > Drive tab).
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