Delta CFP2000 Series, User Manual

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Chapter 12 Description of Parameter Settings

CFP2000
12.1-00-7
Load Selection
Default: 0
Settings 0: Light load
1: Normal load

Light load: over-load rated output current 120% in 60 seconds. Refer to Pr.00-17 for the setting
for the carrier wave. Refer to Pr.00-01 or the specification table in Section 09 for the rated
current.

Normal load: over-load rated output current 120% in 60 seconds (160%, 3 seconds). Refer to
Pr.00-17 for the setting for the carrier wave. Refer to Pr.00-01 or the specification table in Section
9 for the rated current.

Pr.00-01 varies with the setting value for Pr.00-16. The default value and maximum setting value
for Pr.06-03 and Pr.06-04 also vary with the setting value for Pr.00-16.
Carrier Frequency
Default: Table below
Settings 2–15 kHz

This parameter determinates the PWM carrier frequency for the AC motor drive.
460V
Settings 2–15 kHz 2–10 kHz 2–9 kHz
Light Load
Models 1–25 HP [0.75–18.5 kW] 30–100 HP [22–75 kW] 125 HP [90 kW]
Default 6 kHz 6 kHz 6 kHz
Normal
Load
Models 0.5–20 HP [0.4–15 kW] 25–75 HP [18.5–55 kW] 100 HP [75 kW]
Default 6 kHz 6 kHz 6 kHz

From the table, you see that the PWM carrier frequency has significant influences on the
electromagnetic noise, the AC motor drive heat dissipation, and the motor acoustic noise.
Therefore, if the surrounding noise is greater than the motor noise, lower the carrier frequency to
reduce the temperature rise. Although the motor has quiet operation in the higher carrier
frequency, consider the entire wiring and interference.

When the carrier frequency is higher than the default, decrease the carrier frequency to protect
the drive. Refer to Pr.06-55 for the related setting and details.
PLC Command Mask
Default: Read Only
Settings bit0: Control command forced by PLC control
bit1: Frequency command forced by PLC control

Determines if frequency command or control command is locked by PLC