YASKAWA AC Drive-A1000 Technical Manual page 221

Frequency
detection 1
Refer to L4-01, L4-02: Speed Agreement Detection Level and Detection Width on page 256
Setting 5: Frequency Detection 2
The output closes when the output frequency or motor speed (CLV, CLV/PM) is above the detection level set in L4-01. The
terminal remains closed until the output frequency or motor speed fall below L4-01 minus the setting of L4-02.
Status
Open Output frequency or motor speed is below L4-01 minus L4-02 or has not exceeded L4-01.
Closed Output frequency or motor speed exceeded L4-01.
Note: Frequency detection works in forward and reverse. The value of L4-01 is used as the detection level for both directions.
Frequency
Detection 2
Refer to L4-01, L4-02: Speed Agreement Detection Level and Detection Width on page 256
Setting 6: Drive Ready
The output closes when the drive is ready to operate the motor. The terminal will not close under the conditions listed below,
and any Run commands will be disregarded.
• When the power is shut off
• During a fault
• When the internal power supply of the drive has malfunctioned
• When a parameter setting error makes it impossible to run
• Although stopped, an overvoltage or undervoltage situation occurs
• While editing a parameter in the Programming Mode (when b1-08 = 0)
Setting 7: DC Bus Undervoltage
The output closes when the DC bus voltage or control circuit power supply drops below the trip level set in L2-05. A fault in
the DC bus circuit will also cause the terminal set for "DC bus undervoltage" to close.
Status
Open DC bus voltage is above the level set to L2-05
Closed DC bus voltage has fallen below the trip level set to L2-05.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Output Frequency
or Motor Speed
ON OFF
Figure 5.69 Frequency Detection 1 Time Chart
Output Frequency
or Motor Speed
OFF
ON
Figure 5.70 Frequency Detection 2 Time Chart
L4-02
L4-01
Description
L4-02
L4-01
Description
5.7 H: Terminal Functions
L4-01
L4-02
for more details.
L4-01
L4-02
for more details.
5
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