12 Descriptions of Parameter Settings | VFD-ED
Settings 0: Run according to current command
1: Run according to the operation direction of power generation mode, and execute
the power generation direction detection when in power generation mode.
2: After determining the power generation direction, the host controller sends a
running direction command. (When at STOP, the direction of power generation
mode (MO = 32) confirms and the direction of power generation mode does not
remain.) Execute the power generation direction detection every time.
3: After determining the power generation direction, the host controller sends a
running direction command. (When at STOP, the direction of power generation
mode (MO =32) confirms and the direction of power generation mode remains.)
Execute the power generation direction detection one time.
4: Run according to the operation direction of power generation mode, and execute
the power generation direction detection when in normal mode.
Pr.06-46 is enabled when the external terminal detects the emergency power signal EPS (MI=43).
When you set Pr.06-46 to 1 and a forward/reverse run command is given, the drive checks for the
elevator loading and operates in the power regeneration direction (the motor is in power generating
status). The drive uses and operates in the direction that was detected as its power regeneration
direction. For safety, the drive does not operate in user command direction to prevent emergency power
voltage drop (EPS).
When you set Pr.06-46 to 4 (motor with gear box, for IM):
1. When the normal mode runs to the largest power factor angel, the results are saved in Pr.06-69.
2. Compare the power factor angle detected by the power generation direction with Pr.06-68 setting
value, if the value is larger than Pr.06-68, the current direction is saved in Pr.06-70.
3. When in emergency power mode, the drive runs according to the Pr.06-70 operation direction.
VF and SVC control modes: In the time setting in Pr.06-47, the drive detects the elevator loading status by
performing forward/reverse run. Then the elevator operates in the power regeneration direction (the motor
is in power generating status). Refer to the diagram below for the Auto-Detection Timing Graph.
Drive's DC volt age
Output Frequ ency
Operation comma nd
FWD /REV
Emergency pow er
det ect ion
M
I= 43
ON
ON
DC br ake t ime
Power generation
direction search
time
06-44
Operation spe ed
of enege ncy power
Drive is ready
MO=9
ON
ON
ON
MO=31
Low voltage level
Emergency DC voltage
07-03
06-47
MO=32
Power generation
direction searching
Power generation
direction
Refer to auto-det ection
time graph f or more d etail
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