Emerson VSG & VSSG Troubleshooting Guide download pdf (Page 36)

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

Motor Speed Setpoints & Control Screen

VFD SCREEN SETTINGS

Settings:

Auto Button:

Choosing Auto will do the following:

1. While the fan is off the Output Mode will be forced to Manual Mode.

2. When the fan starts, it will remain in Manual Mode at the Initial Speed for the period defined as

Delay Auto.

3. After the Delay Auto time expires, the Output Mode will change to Auto Mode.

4. In Auto Mode, the VFD is enabled to increase and decrease speed to maintain the temperature set-

tings.

5. Increase At: High setting where an increase of speed is desired.

6. Decrease At: Low setting where a decrease of speed is desired

7. Initial Speed: Desired forced speed to start the fan at as described above. Note: The PLC will auto-

matically keep this value to at least the Minimum Speed setting.

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Emerson VSG & VSSG Troubleshooting Guide Page 36