Delta CFP2000 Series, User Manual

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Chapter 12 Description of Parameter Settings

CFP2000
12.1-06-1
06 Protection Parameters

This parameter can be set during operation.

Low Voltage Level
Default: 360.0
Settings 300.0–440.0 V
DC

Sets the Low Voltage (Lv) level. When the DC bus voltage is lower than Pr.06-00, the drive stops
output and the motor free runs to stop.

If the Lv fault is triggered during operation, the drive stops output and the motor free runs to stop.
There are three Lv faults: LvA (Lv during acceleration), Lvd (Lv during deceleration), and Lvn (Lv
in constant speed) that are triggered according to the status of acceleration or deceleration. You
must press RESET to clear the Lv fault. The drive automatically restarts if you set to restart after
momentary power loss (refer to Pr.07-06 Restart after Momentary Power Loss and Pr.07-07
Allowed Power Loss Duration for details).

If the Lv fault is triggered when the drive is in STOP status, the drive displays LvS (Lv during
stop), which is not recorded, and the drive restarts automatically when the input voltage is higher
than Pr.06-00 + Lv return level (as listed below).
Lv Return Level 460V
Frame A–D 60 V
DC
DC Bus Voltage
time
06-00
V
Lv Error
Lv Return Level

Over-voltage Stall Prevention
Default: 760.0
Settings 0: Disabled
0.0–900.0 V
DC

Setting Pr.06-01 to 0.0 disables the over-voltage stall prevention function (connected with
braking unit or braking resistor). Use this setting when braking units or resistors are connected to
the drive.

Setting Pr.06-01 to a value > 0 enables the over-voltage stall prevention. This setting refers to
the power supply system and loading. If the setting is too low, then over-voltage stall prevention
is easily activated, which may increase the deceleration time.

Related parameters: Pr.01-13, Pr.01-15, Pr.01-17, Pr.01-19 Deceleration Time 1–4,
Pr.02-13–Pr.02-15 Multiple-function Output (Relay1–3) and Pr.06-02 Selection for Over-voltage
Stall Prevention.