L4: Frequency Detection - YASKAWA V1000 Series Technical Manual

L3-24: Motor Acceleration Time for Inertia Calculations
n
Sets the time it takes to accelerate the motor from stop to the maximum speed at motor rated torque.
This parameter should be set when using KEB Ride-Thru 2, automatic adjustment for optimal Stall Prevention during deceleration (L2-04 = 2), or the
overvoltage suppression function (L3-11 = 1).
No.
L3-24
Note: Parameter o2-04 is defaulted for a Yaskawa standard 4-pole motor. During Auto-Tuning, o2-04 will be initialized to a Yaskawa standard 4-pole motor if parameter E2-11 is
changed. This value 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:
L3-25: Load Inertia Ratio
n
Determines the ratio between the rotor inertia and the load. Set this parameter when using KEB Ride-Thru 2, when optimizing Stall Prevention during
deceleration (L2-04 = 2), and when using the overvoltage suppression function (L3-11 = 1).
No.
L3-25
Note: When set incorrectly, a fairly large current ripple can result during KEB Ride-Thru 2 and while automatic adjustments are made for Stall Prevention during deceleration (L3-11
= 1). Other possible faults such as OV, UV1, and OC may also occur. load inertia = machine inertia (motor shaft calculated value) / rotor inertia
u

L4: Frequency Detection

Sets the output signal for a series of functions assigned to the multi-function output terminals that determine frequency agree, user-set frequency agree,
frequency detection, and so on.
L4-01: Speed Agreement Detection Level
n
L4-02: Speed Agreement Detection Width
n
L4-01 and L4-02 allow the user to set the Speed Agreement specifications when Frequency Detection 1, Frequency Detection 2, or User-Selected Frequency
Agree 1 are assigned to the multi-function terminals.
For more information, Refer to H2: Multi-Function Outputs on page
L4-03: Speed Agreement Detection Level (+/-)
n
L4-04: Speed Agreement Detection Width (+/-)
n
L4-03 and L4-04 allow the user to set the Speed Agreement specifications when Frequency Agree 2, Frequency Detection 3, Frequency Detection 4, or
User-Selected Frequency Agree 2 are assigned to the multi-function terminals.
For more information, Refer to H2: Multi-Function Outputs on page
L4-05: Frequency Reference Loss Detection Selection
n
L4-06: Frequency Reference at Reference Loss
n
No.
L4-05 Frequency Reference Loss Detection Selection
L4-06 Frequency Reference at Reference Loss
• The frequency reference is considered "lost" when it is entered from an external source, and suddenly falls below 90% for more than 400 ms.
• If L4-05 = 1, the drive will not stop when the frequency reference is lost, but will instead operate at the value set to L4-06. The drive will switch back
to the main frequency reference once it is restored.
• To have a fault output trigger when the frequency reference is lose, set H2-01, H2-02, or H2-03 to "C".
Note: Frequency reference loss detection: analog reference supplied via terminal A1 can be supplied from terminal A2 by setting H3-10 to 0.
L4-07: Frequency Detection Conditions
n
Parameter Overview
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Name
Motor Acceleration Time for Inertia Calculations
J: GD2/4
P: Rated output
.
ta = 2 J [Kgm ] Nr [r/min] / [60 T
To solve for T :
100
.
T = 60 P[kW] x 103 / [2
100
Name
Load Inertia Ratio
Name
Setting Range
0.001 to 10.000
. .
(Nm)]
100
.
Nr (r/min)]
Setting Range
0.0 to 1000.0
171.
171.
Setting Range
0: Drive will stop.
1: Continue running at L4-06.
0.0 to 100.0
5.8 L: Protection Functions
Default Page
Determined by o2-04,
−
E2-11, and E5-01
Default Page
1.0 −
Default Page
0 −
80.0 % −
5
195