5.7 H: Terminal Functions
252 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Setting 15: Frequency detection 3
Output opens when the output frequency or motor speed (CLV, CLV/PM) rises above the detection level set in L4-03 plus
the detection with set in L4-04. The terminal remains open until the output frequency or motor speed falls below the level
set in L4-03. As the detection level L4-03 is a signed value, the detection works in the specified direction only.
Figure 5.76
Figure 5.76 Frequency Detection 3 Example with a Positive L3-04 Value
Refer to L4-03, L4-04: Speed Agreement Detection Level and Detection Width (+/-) on page 289 for more details.
Setting 16: Frequency detection 4
Output closes whenever the output frequency or motor speed (CLV, CLV/PM) is above the detection level set in L4-03.
The terminal remains closed until the output frequency or motor speed falls below L4-03 minus the setting of L4-04. As
the detection level L4-03 is a signed value, frequency detection works in the specified direction only.
Figure 5.77
Figure 5.77 Frequency Detection 4 Example with Positive L3-04 Value
Refer to L4-03, L4-04: Speed Agreement Detection Level and Detection Width (+/-) on page 289 for more details.
Status Description
Open Output frequency or motor speed exceeded L4-03 plus L4-04.
Closed Output frequency or motor speed is below L4-03 or has not exceeded L4-03 plus L4-04 yet.
<1> This is the time chart when L4-07 (Speed Agree Detection Selection) is set to 1 (detection always enabled). The default
setting for L4-07 is 0 (no detection during baseblock). When L4-07 = 0, the terminal opens during baseblock.
Status Description
Open Output frequency or motor speed is below L4-03 minus L4-04 or has not exceeded L4-03 yet.
Closed Output frequency or motor speed exceeded L4-03.
L4-04
Frequency
detection 3<1>
ON
OFF
L4-03
Output Frequency
or Motor Speed
L4-04
Frequency
Detection 4
ON
OFF
L4-03
Output Frequency
or Motor Speed
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