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How to calculate K_ACC & K_DEC from PTO table

5/30/2010 12:55 PM	Rate (0)
PawelO Posts: 2 Rating: (0)	Hello I want to dynamicly change ACC and DEC time from a user program, but K_ACC and K_DEC value in the PTO tabel is very strange calculating. For example i know that: 20ms is K_ACC=16#0100BDA0=dec16825760 so 1ms=16#CD648 but 200ms=16#10012F1 -> 1ms=7E11 I don't understand that.I hope that somebody know how to calcuate it from Hz or ms to PTO K_ACC/DEC value. Please HELP
PawelO Posts: 2 Rating: (0)	Last edited by: PawelO at: 5/30/2010 12:57 PM
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5/31/2010 1:46 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Hello, Please at leat tell us what blocks you use and what you try to control with these blocks. Now I don't understand where you find ACC and DEC parameters. Be more specific.
	Best regards, Darius
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6/1/2010 7:20 PM	Rate (0)
PawelO Posts: 2 Rating: (0)	When I creating new PTO profile the wizard cretating "PTO0 DATA" in V memory. You can observe this in "DATA BLOCK". There you will find K_ACC and K_DEC parameters.I would like to change this two values from HMI panel every time when the PTO output is stoped. But how to calculate this? Mayby is easier way to change acceleration and deceleration time???
PawelO Posts: 2 Rating: (0)
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6/2/2010 8:04 AM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Hello, Now I understand what you mean. I made some tests, but can't find calculation algorithm. I've experimented with MAX_SPEED, SS_SPEED, K_ACC and K_DEC, but values in data block changes in unexpected way. For example, I change only MAX_SPED and don't touch K_ACC and K_DEC, but they still changes somehow. Another example, If I change only K_ACC in wizard, nothing changes in data block. So I think better is not to change these parameters in data block or you need to find the way how it is calculated.
	Best regards, Darius
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5/6/2017 5:49 AM	Rate (0)
dattech Posts: 2 Rating: (0)	Hello I want to dynamicly change ACC and DEC time from a user program, but K_ACC and K_DEC value in the PTO tabel is very strange calculating. For example i know that: 20ms is K_ACC=16#0100BDA0=dec16825760 so 1ms=16#CD648 but 200ms=16#10012F1 -> 1ms=7E11 I don't understand that.I hope that somebody know how to calcuate it from Hz or ms to PTO K_ACC/DEC value. Please HELP.
dattech Posts: 2 Rating: (0)
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12/22/2017 11:17 AM	Rate (0)
Jen_Moderator Posts: 8171 Rating: (174)	New question published by dattech is split to a separate thread with the subject how to calcuate PTO table from Hz or ms to PTO K_ACC/DEC value. Best regards Jen_Moderator
Jen_Moderator Posts: 8171 Rating: (174)
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