Special detection method for underwater acoustic equipment based on PLC (Programmable Logic Controller)

The invention relates to a special detection method for underwater acoustic equipment based on a PLC (Programmable Logic Controller), which is based on a detection device tool, acts through a main program in the PLC, and comprises the following steps of: after starting, rotating a horizontal motor forwards, and after encountering a sensor which rises for 5cm by a mechanical rod, stopping a lifting motor, and counting and recording the descending number; after the data of the first row is actually measured, pressing down the lifting button again, restarting the lifting motor to rotate forwards to the second row, and counting and so on; when the twelfth path of the first column is measured, a counter C0 is electrified, at the moment, a descending button is pressed down, the lifting motor rotates reversely to the position of a limiting switch of the first column, meanwhile, a mechanical rod ascends by 60 cm, and after a sensor is electrified, the reversely-rotating lifting motor is stopped; and returning to the