5.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 249
Setting 5: Frequency Detection 2
Output closes whenever 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 falls below L4-01 minus the setting of L4-02.
Note: Frequency detection works in both forward and reverse. The value of L4-01 is used as the detection level for both directions.
Figure 5.73
Figure 5.73 Frequency Detection 2 Time Chart
Refer to L4-01, L4-02: Speed Agreement Detection Level and Detection Width on page 288 for more details.
Setting 6: Drive ready
Output closes whenever 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 drive’s internal power supply 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
Output closes whenever 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 to set for “DC bus undervoltage” to close.
Setting 8: During baseblock (N.O.)
Output closes to indicate that the drive is in a baseblock state. While in baseblock, output transistors do not switch and no
main circuit voltage is output.
Setting 9: Frequency reference source
A digital output programmed for this function shows the frequency reference source that is currently selected.
Status Description
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.
Status Description
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.
Status Description
Open Drive is not in a baseblock state.
Closed Baseblock is being executed.
Status Description
Open Frequency reference is provided from External reference 1 (b1-01) or External reference 2 (b1-15)
Closed Frequency reference is being sourced from the digital operator.
L4-02
Frequency
Detection 2
ON
OFF
L4-02
L4-01
L4-01
Output Frequency
or Motor Speed
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