Use of ABB frequency converters
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Control an oil pump using an ABB frequency converter. How can the following process be achieved?
1. Upon receiving the start signal, the pump starts up and operates from 0 Hz to 30 Hz, after which it runs at a frequency of 30 Hz. 2. After some time, adjust the operating frequency manually to an appropriate value based on the operating conditions
I need you to provide further clarification: 1. By \"manual adjustment,\" do you mean adjusting it using a panel? Should it still be adjusted using the remote end (DCS)? 2. Where is your pump started from, an on-site start button? Still a panel? Still DCS? 3. Is the frequency of manual adjustment upward or downward, or is either possible?
Start/stop of control system? If so, the inverter has a start terminal and a 4–20mA input terminal; the two wires are connected to the system’s DO points, and the inverter starts when a start signal is sent from the system ； By setting the frequency value to 30HZ in the system settings, you can basically achieve the function you want. I just don’t know if you have any requirements regarding the frequency range of 0~30HZ
This is the most basic setting; the startup time is 30 seconds or even longer. You can set it according to your needs, and when 30 seconds have passed, the frequency will reach 30Hz； This requires a second setting: a minimum frequency of 30Hz. After completing these two settings, adjust the frequency freely after it starts up, but it must not be lower than 30Hz; thus, what you mentioned will be achieved.