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PID Control for S7300 (Forward & reverse)

2/25/2010 11:38 AM	Rate (0)
007 Posts: 34 Rating: (0)	Dear All, CPU313C is used. PID control is through FB41. 1. Our client requirement is ramp rate (%/sec)for all analog outputs (PID)which will be settable from HMI. 2. Our client requirement isForward and reverse button for PID control (Negative entry from shall not be possible i.e. values of P, I, D term shall be always positive). 3. Integral time (TI) & derivative time (TD) are required to set from HMI in secs(unit) whereas in PLC its having TIME as data type. Is there is any conversion from integer to TIME. How to do above, Please help me. With Regards, Rajesh
007 Posts: 34 Rating: (0)
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2/25/2010 1:21 PM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	007 ...Is there is any conversion from integer to TIME... Rajesh Hello Rajesh, Look at Possible method to converting Real to Time in seconds. Seems like your case. Best regards, Hristo Mihalev

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