MULTIPORT ELECTRONIC CONTROLLER continued...

Any time during the movement of the valve, whether by remote commands in REMOTE mode, or by the STEP/JOG pushbutton in STEP mode, or by the HOME button on the circuit board, the valve can be stopped by switching the selector switch to JOG mode on the control station. In normal operation, the circuit board (MP-08) will be displaying a flashing RUN LED to indicate the microcontroller is running normally, similar to the flashing decimal point on the optional digital display. The circuit board also has a MOTOR RUN LED which will turn on while the motor is running.

The position of the valve plug is shown by the indicator and the indicator plate on top of the Multiport Selector Valve. The optional digital display shows the port number which where the valve is at, or near. See details in section for "OPTIONS".

CAUTION:

Since the valve can be controlled remotely, make sure power is disconnected

 

from the entire unit if maintenance is being done on the valve.

H. HOME PORT (POSITION #8) CALIBRATION

CAUTION:

Always ground yourself before touching the switch to prevent static discharge.

To calibrate the Multiport Valve to a home port position, remove the top cover to expose the controller circuit board (MP-08). Use the JOG button on the circuit board to position the valve plug exactly to the selected home port position.

NOTE:

Very brief momentary contact is required for small movements of the valve plug.

 

It is recommended that the home port blind flange be removed and the plug

 

position in the valve body be checked visually.

If the optional control station is connected, the valve can be positioned by switching to JOG mode and pressing the STEP/JOG pushbutton.

NOTE:

The correct alignment of the plug seal to the port can be visually checked by

 

lining up the hex corner of the lower connector with the applicable slot on the

 

indicator plate.

In the middle of the circuit board there is a small pushbutton marked "SET ZERO". Press and hold the "SET ZERO" button for 10 seconds and release. If the digital display option is installed, it will display #0 when the "SET ZERO" button is pressed for 10 seconds, but change to #8 when calibrated. As well, the RUN LED will flash rapidly for 10 seconds, until calibration is complete.

The present valve home port position is now calibrated and will be stored in the controller's memory as position #8. If the optional digital display is connected, the display will first show '0' when the SET ZERO button is depressed, and then change to show '8' to indicate for position #8. Further movements of the valve will be referenced to the home port. When viewed from above, the Multiport Valve rotates counter-clockwise (CCW) only, the first port CCW relative to the home port (#8) will be position #1. Note that the home position can be configured with a portable computer to be any port position on the Multiport Valve. The home port position is stored in EEPROM memory.

NOTE: The factory default home port is always set to #8. If the home port is set to any other port position (from #1 to #7), then the first port CCW relative to home port in this case will be the next higher #port (ie. if home is #7, then next port relative to home is #8).

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