L4: Speed Agree/Frequency Reference Loss Detection - YASKAWA CIMR-VU BA0001 Technical Manual

<1> Parameter L3-24 is defaulted for a Yaskawa standard 4-pole motor. During Auto-Tuning, L3-24 will be initialized to a Yaskawa standard 4-pole
motor if parameter E2-11 is changed. This value also changes based on the motor code set to E5-01 when using the Open Loop Vector Control
Mode for PM motors.
Calculations are made as follows:
The rated torque can be calculated as follows:
n L3-25: Load Inertia Ratio
Determines the ratio between the rotor inertia and the load. Set this parameter when using KEB Ride-Thru 2, Intelligent Stall
Prevention during deceleration (L3-04 = 2), or the overvoltage suppression function (L3-11 = 1).
No.
L3-25
When set incorrectly, a fairly large current ripple can result during KEB Ride-Thru 2 and overvoltage suppression (L3-11 =
1) or other faults such as ov, Uv1, and oC may occur.
Parameter L3-25 can be calculated by:
u

L4: Speed Agree/Frequency Reference Loss Detection

These parameters set up the speed agree and speed detection functions which can be assigned to the multi-function output
terminals.
n L4-01/02: Speed Agreement Detection Level and Detection Width
Parameter L4-01 sets the detection level for the digital output functions "Speed Agree 1", "User Set Speed Agree 1",
"Frequency Detection 1", and "Frequency Detection 2".
Parameter L4-02 sets the hysteresis level for these functions.
No.
L4-01
L4-02
Refer to H2-01 to H2-03: Terminal MA/MB/MC, P1/PC and P2/PC Function Selection on page
5.
n L4-03/04: Speed Agreement Detection Level and Detection Width (+/-)
Parameter L4-03 sets the detection level for the digital output functions "Speed Agree 2", "User Set Speed Agree 2",
"Frequency Detection 3", and "Frequency Detection 4".
Parameter L4-04 sets the hysteresis level for these functions.
No.
L4-03
L4-04
Refer to H2-01 to H2-03: Terminal MA/MB/MC, P1/PC and P2/PC Function Selection on page
and 16.
n L4-05: Frequency Reference Loss Detection Selection
The drive can detect a loss of an analog frequency reference from input A1 or A2. Reference loss is detected when the frequency
reference value reduces for 90% within 400 ms.
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
2
L3-24 =
T [Nm] =
rated
Name
Load Inertia Ratio
L3-25 =
Name
Speed Agreement Detection Level
Speed Agreement Detection Width
Name
Speed Agreement Detection Level (+/-)
Speed Agreement Detection Width (+/-)
J [kgm 2 ] n [r/min]
rated
60 T [Nm]
rated
60 P [kW] 10
3
Motor
2 n [r/min]
rated
Setting Range
Machine Inertia
Motor Inertia
Setting Range
0.0 to 400.0 Hz
0.0 to 20.0 Hz
Setting Range
0.0 to 400.0 Hz
0.0 to 20.0 Hz
5.8 L: Protection Functions
Default
0.0 to 1000.0
Default
0.0 Hz
2.0 Hz
195, Settings 2, 3, 4, and
Default
0.0 Hz
2.0 Hz
195, Settings 13, 14, 15,
1.0
5
227