METHOD FOR MONITORING THE OPERABILITY OF AN ACTUATOR

摘要

A method of checking the operability of an actuator is provided. The actuator includes a control valve adjustable via an actuating drive by an actuating element, a position sensor detecting the actual position of the actuating element, and an electropneumatic position controller creating a pneumatic controlled variable depending on an actual position and a target position. The target position is provided to the actuating drive via an activated magnetic valve. The actuating element is moved over a section of an adjustment path for an execution of a partial-stroke test of the actuating element, the adjustment movement being detected. The magnetic valve is deactivated for a short time such that the actuating element is moved over only a section of the adjustment path. To facilitate the monitoring of the operability of the actuator, the partial-stroke test and the test of the magnetic valve are performed in a single test sequence.