Test method, device and system for ECP manual instruction of reactor protection system

The invention discloses a reactor protection system ECP manual instruction test method, device and system, and the method comprises the steps: collecting an instruction signal of an ECP manual button through two triggering paths by each priority logic control module PLM, and inputting the collected ECP manual protection soft logic signal to a first input port of each PLM, an ECP manual protection hard logic signal is input to a second input port of each PLM; each PLM sends the collected first input port signal and the second input port signal to an NC DCS system through a gateway; in the NC DCS system, logic AND operation and logic OR operation are carried out on all the first input port signals and all the second input port signals respectively, and two indication signals are obtained; and according to the indication signal and the action state feedback of the field driver, the inspection of the two trigger paths and the field driver is completed at one time. According to the invention, the test process is s