This research design is aimed to: 1. Overcome the conflict signal on memory valve 5/2-way that may affect the piston motion. 2. Create motion of piston cylinder according to motion notation: A+ A- B+ B-. The method that used to solve problem is known " Modular System" module. The work principle of this modular system is adjusting input signal from sensor S1, S2, S3, and S4, and then to output solenoid actuator Y1 and Y2 with referred to preparing and eliminating signal. Adjusting of signals send be done by relays with it each contactor such as normally open (NO) or Normally Closed (NC). To result of piston cylinder motion above, are needed eleven relays which change signal processing from sensor to solenoid actuator. The signal from modular system will be sent to SET position Y and return spring as RESET position of the valve 5/2-way with signal conditioning that non conflict more. Research revealed that conflict signal did not occur more in the last valve control. This was proven by: a. There were not any signal at the valve 5/2-way in the position SET (Y=1) and position RESET by spring. b. There was an action of actuator in the work cylinder with an out in movement without obstacle more. It was then concluded that conflict signal on memory valve 5/2-way can be coped with by a modular system process so that piston cylinder motion with notation: A+ A- B+ B- can be reached. Keywords: overcome, conflict signal, modular system.