Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-11-3
bit6 = 0: The S acceleration / deceleration curves (Pr.01-24–Pr.01-27) affect the drive starts and
stops. Forward / reverse rotation crosses the zero point after the S-Curve.
Green line: Frequency command
Red line: Frequency command with acceleration / deceleration
Blue line: The motor’s actual output frequency
bit7 = 0: Save the frequency before power is OFF. When power is ON again, display the
frequency saved before it was off.
bit7 = 1: Do not save the frequency before power is OFF. When power is ON again, display
0.00 Hz.
Pr.11-00 bit7 is valid when Pr.00-20 (Master frequency command source) is set to 0 (digital
keypad), 1 (RS-485 communication input) or 3 (External UP / DOWN terminal), other frequency
commands are invalid.
bit8 = 0: Pr.11-43 sets the maximum speed for point-to-point position control
bit8 = 1: The external multi-speed terminal sets the maximum speed for point-to-point position
control. When the external multi-speed terminal is 0, Pr.11-43 sets the maximum speed.
bit11 = 1 (0800h): Enable the mode-switching function.
bit11 = 0: Disable the mode-switching function.
The function to switch between IMFOCPG and IMVF is only valid in IM FOCPG control mode.
The mode-switching function of bit11 is applicable for the high-speed operation region of
IMFOCPG or feedback of high ppr. If the speed of the motor is too fast and cause the feedback
signal frequency to be higher than the hardware bandwidth of PG card, then you can use Pr.10-
39 and Pr.10-40 to switch open-loop IMVF and close-loop IMFOCPG.
11-01
Per Unit of System Inertia
Default: 256
Settings 1–65535 (256 = 1PU)
To get the system inertia per unit from Pr.11-01, you need to set Pr.11-00 to bit1 = 1 and execute
continuous forward / reverse running.
When Pr.11-01 = 256, it is 1PU. So if you use a 2 HP motor, the 2 HP motor inertia is 4.3 kg-cm
2
according to the table below.
If Pr.11-01 = 10000 after tuning, the system inertia is (10000 ÷ 256) × 4.3 kg-cm
2
.
Pr.11-00 bit6=1
Pr.11-00 bit6=0
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