Notes for input and output: Power: +24V、-GND
Signal of potentiometer: P1, P2, P3
I. Input signal: (command from control room: low-level pulse effective, GND is a common port) 1. CLOSE (valve needs to be closed) 2. MID (valve needs to be in neutral position) 3. OPEN (valve needs to be opened) (Note: The system will make relevant action according to the control command received finally)
II. Output signal: (state signal input to control room: 24V, GND is a common port) OUTC: the valve is in close position; OUTM: the valve is in neutral position;
OUTO: the valve is in open position;
III. Solenoid valve signal: (control duplex electric-controlled solenoid valve) 1.Close the valve signal (VC+, VC-) 2.Open the valve signal (VC+, VC-)
Instruction on manual control:
Manual control key (3): 1. Commissioning keys: 3 keys (manual control function/analog command of control room--distinguishing functions according to SW1:ON/OFF) K_C: manual closing of valve/request to close valve; K_M: set function key/request the valve to be in neutral position; K_O: manual opening of valve/request to open valve;
2. Setting function: K_M key (when SW1=ON, it is active, used for setting closing position, neutral position and opening position) Operating procedure: (after entering the setting state, valve position can be adjusted manually by K_C and K_O keys). A) Press K_M key for long time to make LED yellow light flash for several times, then release this button and make the system go into setting state; B) Press K_C key to make the valve in close position, press K_M key for short time to make LED yellow light flash for one time, go into the next setting state: C) Press K_C or K_O key to make the valve in neutral position, press K_M key for short time to make LED yellow light flash for one time, go into the next setting state:
D) Press K_O key to make the valve in open position, press K_M key for short time to make LED yellow light flash for several times, the setting is finished.
Pull SW1 to OFF position to make the system enter into normal working state automatically (if yellow light flashes continuously, it means the positions are overlapped or the potentiometer is in blind area, the start position of potentiometer needs to be adjusted for resetting). |