Emerson VSG Operation Manual page 32

· Capacity Control °F Increase – The capacity of the compressor will increase when process temperature is at
or above the ON setpoint, and the increase "off" timer has cycled. Capacity will continue to increase until the
Capacity Control °F Increase OFF setpoint is reached. If closer system control is desired, set the ON and OFF
setpoints at the same values. This will essentially eliminate and difference between the ON and OFF setpoints.
Process temperature control of the capacity is active only if the Compressor Control Via Process Temperature
option is selected on the Setup screen.
· Capacity Control °F Decrease – The capacity of the compressor will decrease when process temperature is at
or below the ON setpoint, and the increase "off" timer has cycled. Capacity will continue to decrease until the
Capacity Control °F Decrease OFF setpoint is reached. If closer system control is desired, set the ON and OFF
setpoints at the same values. This will essentially eliminate and difference between the ON and OFF setpoints.
Process temperature control of the capacity is active only if the Compressor Control Via Process Temperature
option is selected on the Setup screen.
32
Compressor Control Setpoints
VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL