Delta C2000 Plus Series User Manual

Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-07-3

07-06
Restart after Momentary Power Loss
Default: 0
Settings 0: Stop operation
1: Speed tracking by the speed before the power loss
2: Speed tracking by the minimum output frequency
 Determine the operation mode when the drive restarts from a momentary power loss.
 The power system connected to the drive may power off momentarily due to many reasons. This
function allows the drive to keep outputting voltages after the drive is repowered and does not
cause the drive to stop.
 Setting 1
: Frequency tracking begins before momentary power loss and accelerates to the master
Frequency command after the drive output frequency and motor rotator speed are synchronous.
Use this setting when there is a lot of inertia with little resistance on the motor load. For example,
in equipment with a large inertia flywheel, there is NO need to wait until the flywheel stops
completely after a restart to execute the operation command; therefore, it saves time.
 Setting 2: Frequency tracking starts from the minimum output frequency and accelerates to the
master Frequency command after the drive output frequency and motor rotator speed are
synchronous. Use this setting when there is little inertia and large resistance.
 In PG control mode, the AC motor drive executes the speed tracking function automatically
according to the PG speed when this setting is NOT set to 0.
 This function is only valid when the RUN command is enabled.

07-07
Allowed Power Loss Duration
Default: 2.0
Settings 0.0–20.0 sec.
 Determine the maximum time of allowable power loss. If the duration of a power loss exceeds this
parameter setting, the AC motor drive stops output after the power recovers.
 Pr.07-06 is valid when the maximum allowable power loss time is ≤ 20 seconds and the AC motor
drive displays “Lv”. If the AC motor drive is powered off due to overload, even if the maximum
allowable power loss time is  20 seconds, Pr.07-06 is invalid after the power recovers.

07-08
Base Block Time
Default: Depending on the
model power
Settings 0.0–5.0 sec.
 When momentary power loss is detected, the AC motor drive blocks its output and then waits for
a specified period of time (determined by Pr.07-08, called Base Block Time) before resuming
operation. Set this parameter to the time that allows the residual voltage at the output side to
decrease to 0 V before activating the drive again.
 This parameter is not only for the B.B. time, but also is the re-start delay time after free run.
 The RUN command during a free run operation is memorized, and runs or stops with the last
frequency command after the delay time.
 This delay time is only applicable in “Re-start after coast to stop” status, and does not limit ramp
to stop. The coast to stop can be caused by various control command source, or by errors.

Delta C2000 Plus Series Specifications

General

Brand	Delta
Model	C2000 Plus Series
Category	DC Drives
Language	English