Emerson VSG & VSSG, Software Manual

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54
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.