Emerson VSG & VSSG Troubleshooting Guide download pdf (Page 56)

VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL

Installation Instructions For Replacement Of Optical Actuator

CAUTION: WHEN INSTALLING THE OPTICAL SLIDE

MOTOR, LOOSEN LOCKING COLLAR BEFORE SLID-

ING THE COLLAR DOWN THE SHAFT. DO NOT USE

A SCREWDRIVER TO PRY LOCKING COLLAR INTO

POSITION.

OVERVIEW

Calibration of an optical slide valve actuator is

a two step process that must be done for each

actuator installed on the compressor. The steps

are as follows.

1. The actuator motor control module, located

inside the actuator housing, is calibrated so

that it knows the minimum and maximum ro-

tational positions of the slide valve it controls.

The calibrated actuator will output 0 VDC at the

minimum position and 5 VDC at maximum posi-

tion.

2. After the actuator motor control module has been

calibrated for 0-5 Volts, the controlling channel

corresponding to the actuator motor (either the

capacity or volume) has to be calibrated. This in-

structs the PLC to learn the rotational 0% position

& rotation 100% position of the slide valve travel.

Please Note:

Because there is an optical sensor on this motor,

DO NOT attempt to calibration in direct sunlight.

3. Before applying power to the PLC disconnect the

gray and yellow cable.

4. Power the PLC back on.

5. Refer to Calibration Procedure of Optical Actua-

tors.

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Emerson VSG & VSSG Troubleshooting Guide Page 56