In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

Nick,
  If the PWM is not working, then that is your first task. There is no sense trying to get a closed loop system working unless the PWM is working properly. 
  What does the tach signal look like ? Is it a positive pulse or a negative pulse ? What is the maximum tach frequency ?
Bean.

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