edward.ortiz
Member
I am working with a 1214 siemens plc and I have connected the pulse output of a flowmeter into the digital input of the cpu with the HSC enabled for that input. I am able to read the flow rate and i have converted this value into the amount of pounds that are flowing through the meter. I have a manifold, which is about 4 feet long and with a 1 inch diameter, and i have 5 valves tied into the manifold at a 45 degree angle. The manifold then makes a 90 degree turn and flows into the flow meter. I have a valve 3 inches after the flow meter. I am having issues in calculating the offset that is involved. For example, if i input of a set point of 20 pounds of chemical one, the plc will output a signal to chemical 1 solenoid valve and simultaneously open the end product valve at the end of the flow meter. I noticed that if i input 20 pounds, the end product which i weigh with a scale i get an amount more than 20 pounds. Is there an equation or a way in order to calculate and account for the amount i need to subtract from the setpoint in order that the product that flow out is equal to the setpoint? If you need anymore information please let me know. Thank you