L4: Speed Detection - YASKAWA CIMR-ZU A Series Programming Manual

1 8 L Protection Functions
Calculate the rated torque in the formula below:
L 2 Load Inertia atio
Determines the ratio between the rotor inertia and the load. Set this parameter when using Single Drive KEB 2 (L2-29 = 1),
Intelligent Stall Prevention during deceleration (L3-04 = 2), or the overvoltage suppression function (L3-11 = 1).
This function is available in OLV/PM control mode.
Note:
No
L3-25
When set incorrectly, a fairly large current ripple can result during Single Drive KEB 2 (L2-29 = 1). This may cause overvoltage
suppression (L3-11 = 1) or other faults such as ov, Uv1, and oC.
Calculate parameter L3-25 in the formula below:
L 2 Additional DC Bus Capacitors
Sets the capacity of any additionally installed DC bus capacitors. This data is used in calculations for Single Drive KEB Ride-
Thru 2. Adjust this setting only if external capacity is connected to the DC bus and Single Drive KEB 2 is used.
No
L3-26
L 27 Stall Pre ention Detection ime
Sets a delay time from when the Stall Prevention level is reached and the actual Stall Prevention function is activated.
No
L3-27
L Speed Detection
These parameters set up the speed agree and speed detection functions that can be assigned to the multi-function output
terminals.
The speed is detected using the motor speed when A1-02 = 3 or 7.
L 1 L 2 Speed A reement Detection Le el and Detection
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 M1-M2, M3-M4, and M5-M6 Function Selection on page
L L Speed A reement Detection Le el and Detection
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.
112
2
L3-24 =
T [Nm] =
rated
Name
Load Inertia Ratio
L3-25 =
Name
Additional DC Bus Capacitors
Name
Stall Prevention Detection Time
Name
Speed Agreement Detection Level
Speed Agreement Detection Width
J [kgm ] n [r/min]
2
rated
60 T [Nm]
rated
60 P [kW] 10
3
Motor
2 n [r/min]
rated
Settin
Machine Inertia
Motor Inertia
Settin
Settin
Settin
an e
0.0 to 1000.0
an e
0 to 65000 μF
an e
0 to 5000 ms
idt
an e
0.0 to 240.0 Hz
0.0 to 20.0 Hz
84, Settings 2, 3, 4, and 5.
idt ( / )
De ault
1.0
De ault
0 μF
De ault
50 ms
De ault
0.0 Hz
2.0 Hz