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PID with digital output

2/14/2011 8:27 PM	Rate (0)
Devin Decorte Posts: 8 Rating: (0)	Thanks for you're support man !!!! Regards Devin Decorte Attachment Project PWM.zip (510 Downloads)
Devin Decorte Posts: 8 Rating: (0)
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This contribution was helpful to 1 thankful Users phanthetien

2/15/2011 4:06 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 11/19/2024 Posts: 15406 Rating: (2446)	If you want to use PWM of a digital output, you will need to ensure it is enabled in the device configuration. Once configured, you can directly control the PWM digital output from the PID control. If you want to control with a simple on/off, you will need some compare instructions in your main loop to compare the control output signal against setpoint. Then set or reset the output based on the error or difference between setpoint and actual. You will also need to tune the PID once online if you use the PWM option. Maybe that will help get you started.
	science guy
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2/15/2011 8:44 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/19/2024 Posts: 4353 Rating: (1452)	Hi, if you want to use the PID in OB1, you can base your solution in the sample program: Sample program: PID Lean /tf/WW/en/Posts/45886#top To convert a Analogical value to PWM (slow), you can use the sample program: Sample program: PID Lean PWM generator for standard IO /tf/WW/en/Posts/42960#top
	Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 1 thankful Users 0_Einstein

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