MULTIPORT ELECTRONIC CONTROLLER continued...

Register

 

 

Read disable positions.

40003

 

 

- Bits 1 to 8 indidacte which positions are disabled.

 

 

 

 

Register

 

 

Read current encoder position.

40004

 

 

- 0 to 1023

Register

 

 

Write to set home position number.

40005

 

 

Read current home position number.

 

 

 

- 1 to 8

RS-232 connections to MP-08 DA-09 connector:

Pin #2

= RX-232 TX to host

Pin #3

= RS-232 RX from host

Pin #5

=

Signal ground

Pin #7

=

RTS to host

Pin #8

=

CTS from host

RS-485 connections to MP-08 DA-09 connector:

Pin #6

= RS-485 -

Pin #9

=

RS-485 +

General RS-485 cable specifications are:

-1 pair twisted shielded

-120 ohm impedance

-30 Volt rating

-24 gauge

-stranded conductors

Example: Belden #9841 with RS-485, maximum distance is 4000 ft. When using other cable, the terminating resistance may vary from 120 OHM. Contact the factory for assistance.

Optional software is available for personal computers in DOS, Windows 3.11, and Windows 95 versions.

E.ELECTRONIC CONTROLLER FEATURES

When a command is sent from the host device to move the valve to a position, the MEC turns on the motor and monitors the position until the valve is within a few degrees of actual position. At that time the motor will be turned off to prevent its momentum from overshooting the required position. If the valve is still not quite on position, the microcontroller will pulse the motor to slowly move to the exact position. The microcontroller will also compensate for changes in torque requirements to accurately position the valve, regardless of the media or valve conditions.

Small pushbuttons on the circuit board allow local control for calibration/maintenance purposes.

Jumpers on the circuit board will disable any ports on the Multiport Valve which are not being utilized.

LED's on the circuit board indicate operating status.

8