10/11/2017 4:30 PM | |
Posts: 12 Rating: (0) |
hi friends, I build one application of controlling the pressure in a pumping station using S7 1200 PLC model 1212C and using the the PID block in the ladder. i added one 4AQ analog modules to the CPU and configured 0-10 v in the device configuration. in the ladder , the PID output is properly showing and Iam converting the real output to integer as QW112 same as configured in the device configuration. BUT I AM NOT GETTING THE PHYSICAL OUTPUT FROM THE MODULE . please help ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 10/12/2017 10:12:34 AMNew subject after splitting |
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10/12/2017 7:22 PM | |
Joined: 7/7/2010 Last visit: 10/25/2024 Posts: 15361 Rating: (2436)
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2 things. 1. Download the hardware configuration (if you have not already.... the download button on the menu does not necessarily do that!!!!). 2. Use Norm / Scale to normalize a value from 0-1.0, then scale will work if you set it to 0 to 27648. Scale from 1.0 to 276.0 is wrong in most every case. A value of 38.39788 into a scale block is wrong. Scale block input ranges from 0.0 to 1.0 (normalized values are expected). Check the documentation for NORM and SCALE blocks and use them, one in front of the other in your ladder.
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science guy |
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This contribution was helpful to1 thankful Users |
10/17/2017 9:43 AM | |
Posts: 12 Rating: (0) |
Thank you very much for the valuable information and guidance. |
This contribution was helpful to1 thankful Users |
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