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need to help Pid in S7 1200

5/24/2014 9:26 AM	Rate (0)
Deleted User Posts: 767 Rating: (69)	hi newbieplc1200! I have to problem like you! When I power off plc s7-1200 cpu 1214C in two days, pid_compact not work. help me method save parameter in pid_compact when power off! English of me very bad ! Thanks you!
Deleted User Posts: 767 Rating: (69)
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5/24/2014 12:23 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	vuongvuong1234 hi newbieplc1200! I have to problem like you! When I power off plc s7-1200 cpu 1214C in two days, pid_compact not work. help me method save parameter in pid_compact when power off! English of me very bad ! Thanks you! In case of critical PID controller parameters , try keep them in retentive memories or document them if they are result of extensive works! also check: How can you prevent the PID Compact controller of the S7-1200 from switching off when the controller is switched off and on again and in the case of invalid process values?
	Last edited by: hdhosseini at: 5/24/2014 12:36 PM Demo Channel on Youtube
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2/6/2015 11:31 AM	Rate (0)
frosties Posts: 2 Rating: (0)	newbieplc1200 hi, Tonight when I tried to read manual s7 1200 again, I done , thanks for everybody help me. the key variable to control pid is "PID_Compact_1".sRet.i_Mode" . g9 Can you give a step by step guide how to change sRet.i_Mode to keep pid running after power off please because i have the same problem with you. PID does not start after power off. i have to go online and press enable. thank you
frosties Posts: 2 Rating: (0)
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4/28/2015 11:45 AM	Rate (0)
Min_Moderator Posts: 4757 Rating: (122)	New question published by iv73nikolov is split to a separate thread with the subject Problems in simulate PID controller. Best regards Min_Moderator
Min_Moderator Posts: 4757 Rating: (122)
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