Installation manual

Geo Direct PWM Amplifier
Power PMAC2 Drive Setup 40
POWER PMAC2 DRIVE SETUP
Caution
The ADC Strobe Word, Gate1[i].AdcStrobe, must be set to $3FFFFF
for proper operation in default mode. Failure to do so could result in
damage to the amplifier.
Key Gate Parameters
The following Gate-specific parameters are essential for the proper software setup of the Geo Direct
PWM Drive:
Structure Element
Description
Typical/Default
Notes
Gate1[i].PwmPeriod
PWM Frequency
6527
4.50 KHz PWM
Gate1[i].PhaseClockDiv
Phase clock divider
0
9.00 KHz Phase
Gate1[i].ServoClockDiv
Servo clock divider
3
2.25 KHz Servo
Gate1[i].HardwareClockCtrl
Hardware Clocks
2258
2.50 MHz ADC Clock
Sys.ServoPeriod
= 1000 * (Gate1[4].ServoClockDiv + 1) / 18000
Sys.PhaseOverServoPeriod
= 1 / (Gate1[4].ServoClockDiv + 1)
Gate1[i].AdcStrobe
ADC Strobe Word
$3FFFFF
Default Mode
Gate1[i].Chan[j].OutputMode
Output mode
0
PWM output
Note
Sys.ServoPeriod and Sys.PhaseOverServoPeriod must be re-computed
if the main clocks (Phase, PWM, and Servo) are changed.
Note
The above settings require a Save and a Reset ($$$) on the PMAC
side in order to take effect.