CERUS CI-007-P2 - Pre-Heat Level and Duty Cycle; VFD Start Modes; DC-Injection Start Time and Value; DC Injection Braking Parameters

Chapter 6 - Parameter Description
6-13
FG1  PreHeatLevel
11 20%
FG1  PreHeat Duty
12 30%
FG1  DcSt Time
21 0.0 sec
FG1  DcSt Value
22 50%
FG1  DcBr Delay
24 0.10 sec
FG1  DcBr Freq
25 20.00 Hz
FG1  DcBr Time
26 3.0 sec
FG1  DcBr Value
27 50%
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The FG1-11 parameter determines the pre-heat
current as a percentage of SET-03 Motor FLA.
Increase this level from default setting if ambient
temperature is lower than 41°F (5°C).
The FG1-12 parameter determines the pre-heat duty
cycle for on time as a percentage of Pre-Heat 10
sec. cycle. Increase this level from default setting if
ambient temperature is lower than 32°F (0°C).
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The FG1-20 parameter
has three selections:
Accel, DC-Start and Flying Start.
Accel-the VFD acceleration pattern is based on
FG1-01 selection.
DC-Start-the VFD stays at start frequency for
FG1-21 time providing an initial motor
magnetization by DC current to a level set in FG1-
22 and then ramps up to the speed reference.
Flying Start- the VFD can start with motor load
already rotating in forward or reverse direction. The
FG2-27 Flying Start Level should be set to less than
50% if load rotation direction is opposite of the
supplied command.
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If both parameters FG1-21 and FG1-22 are set to 0
or Sensorless Control Mode is selected in parameter
FG2-60, the DC-Start mode will be disabled.
The FG1-21 parameter determines the time for
initial magnetization and FG1-22 determines the
DC current value as a percentage of the Motor
FLA.
DC-start is deactivated in Sensorless mode.
The VFD can trip on No Motor Trip or Output
Phase Loss when DC-start is activated.
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These parameters become available when SET-16
Stop Mode is set to DC-Brake.
FG1-24 is the setting for the time delay before DC
Braking is activated.
FG1-25 is the frequency setting below which the
FG1  Start Mode
20 Accel
Output Frequency
Time
VFD
Start
ON
Output Current
Time
Time
Stop Command
DCBr
Freq
DCBr
Value
T1
T2
Deceleration
T
1:
FG1
-
24
T2: FG1-26
VFD Runs
DC
Inject
DC Injection
Voltage
Speed Reference
Output Frequency
Time
VFD
Start
ON
Output Voltage
Time
Time
Start
Frequency
FG1-21
Time
T1
T1: FG1-21 [Starting DC Magnetization Time]
D1: FG1-22 [Starting DC Magnetization value]
Output Current
Time
D1