11/24/2019 10:27 AM | |
Posts: 32 Rating: (1) |
Dear Experts, i have flow meter with pulse input, i want program(s7-1500) based on pulse input display the real flow value. if anybody have sample program using pulse input please attach. ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 11/25/2019 07:27:36New subject after splitting |
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12/7/2019 2:46 PM | |
Posts: 32 Rating: (1) |
Dear expert, TIA PORTAL 15.1, NORMAL DI, FLOW METER AIR VELOCITY |
12/7/2019 8:27 PM | |
Joined: 9/16/2013 Last visit: 1/5/2024 Posts: 511 Rating: (106) |
Hello ganga10, In the case you have checked what Mr. CaOd said, You can measure number of impulses in some fixed period. You should know from flow sensor datasheet how much flow brings 1 impulse. Another option is that your sensor gives you frequency of impulses for rated flow. By measuring frequency of incoming impulses , with linear law you can find correct flow. Based on your CPU and DI or HSC DI there are some options to manage this task, therefore accuracy is determined by your hardware. For example you can determine fixed time period with hardware interrupt or with HSC Gate Input or simply something inside regular cycle OB or even inside OB1. Based on what you choice you get wanted accuracy.
Best Regards Soble |
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