YASKAWA CIMR-ZU A Series Programming Manual page 113

No
L4-03
L4-04
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and M5-M6 Function Selection on page
16.
L Fre uency e erence Loss Detection Selection
The drive can detect a loss of an analog frequency reference from input A1 or A2. Frequency reference loss is detected when
the frequency reference drops below 10% of the reference or below 5% of the maximum output frequency within 400 ms.
Set H2-01 or H2-02 to C for a digital output to trigger when frequency reference loss occurs.
Reference Loss on page 88
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No
L4-05 Frequency Reference Loss Detection Selection
Settin Stop
Drive follows the frequency reference (which is no longer present) and stops the motor.
Settin 1 Continue Operation
The drive will continue operation at the percent of the previous frequency value set to parameter L4-06. When the external
frequency reference value is restored, the operation is continued with the frequency reference.
L Fre uency e erence at e erence Loss
Sets the frequency reference level at which the drive runs when L4-05 = 1 and when detecting a reference loss. The value is
set as a percentage of the frequency reference before the loss was detected.
No
L4-06
L 7 Speed A ree Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
No
L4-07
Settin No Detection durin basebloc
Settin 1 Detection al ays enabled
L Fault estart
After a fault has occurred, Fault Restart attempts to automatically restart the motor and continue operation instead of stopping.
The drive can perform a self-diagnostic check and resume the operation after a fault has occurred. If the self-check is successful
and the cause of the fault has disappeared, the drive restarts by first performing Speed Search
for details).
page 31
1. The wiring sequence should remove the Forward/Reverse command when a fault is triggered and output is shut off.
Note:
Name
Speed Agreement Detection Level (+/-)
Speed Agreement Detection Width (+/-)
Analog
frequency
reference
400 ms
Loss of
Reference
OFF
output
Fi ure 1
for details on setting the output function.
Name
it educed Fre uency e erence
Name
Frequency Reference at Reference Loss
Name
Speed Agree Detection Selection
100%
10%
ON
time
Loss o e erence Function
1 8 L Protection Functions
Settin an e
-240.0 to 240.0 Hz
0.0 to 20.0 Hz
84, Settings 13, 14, 15, and
Refer to Setting C: Frequency
Settin an e
0, 1
Settin an e
0.0 to 100.0%
Settin an e
0, 1
(Refer to b3: Speed Search on
De ault
0.0 Hz
2.0 Hz
De ault
1
De ault
80.0%
De ault
0
1
11