| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump control device in which an additional inverter device can be easily installed at low cost and that can continue pump operation even if a state quantity measuring device such as a pressure sensor fails.SOLUTION: A first inverter device VFD1 functions as a master device that generates a control signal to control the operation of motor pumps MP1 and MP2 on the basis of a state quantity measured by a first state quantity measuring device DP1, and a second inverter device VFD2 functions as a slave device that receives the control signal to drive the motor pump MP2 connected to the second inverter device VFD2. When an abnormality occurs in the first inverter device VFD1 or the first state quantity measuring device DP1, the second inverter device VFD2 functions as a master device, and the first inverter device VFD1 functions as a slave device. |
