YASKAWA L1000A - Page 240

5.8 L: Protection Functions
240 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Figure 5. 43
Figure 5.43 Overload Tolerance for Braking Transistor (CIMR-LU20008 to 20115, CIMR-LU40005 to 40060, and 50003
to 50041)
■ L8-77: Oscillation Suppression
If speed oscillations with the same frequency as the output frequency occur with an unloaded motor, parameter L8-77 can
be adjusted to suppress these oscillations. While watching the motor speed, increase or decrease L8-77 until the
oscillation disappears.
This parameter rarely requires adjustment.
■
L8-88: Safe Disable Operation Mode
Determines the operation performed by the drive when the Safe Disable input is activated.
Setting 0: Mode 0
Setting 1: Mode 1
When the Safe Disabled Input is triggered, the operator displays and alarm, and the corresponding output terminal will
react as follows.
No. Parameter Name Setting Range Default
L8-77 Oscillation Suppression –100 to 100 0
No. Parameter Name Setting Range Default
L8-88 Safe Disable Operation Mode 0 or 1 1
L8-88
Safe Disable Operation
Selection
Alarm Display during Safety Disable Alarm Output (H2- = 10)
Drive Ready
(H2- = 6)
0 (mode 0) Hbb ALM flashes ON OFF
1 (mode1) Hbb ALM flashes OFF ON
100
%
50
30
20
10
5
3
2
Braking Torque = 30%
50%
70%
100%
130%
150%
1102 5 200 500 1000 20001005020
Operation Time (s)
(%)
(%ED)
8
16
5
43
21
29
67
80
170
150
106
58
90
160
270
380
420
1200
600
1800
230
500
760
Usage
common_
TMonly
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