Hitachi CP-X200 instruction manual －40, Frequency Arrival Signals

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Frequency Arrival Signals

The Frequency Arrival group of outputs helps coordinate external systems with the current velocity profile of the inverter. As the name implies, output [FA1] turns ON when the output frequency arrives at the standard set frequency (parameter F001). Output [FA2] relies on programmable accel/ decel thresholds for increased flexibility. For example, you can have an output turn ON at one frequency during acceleration, and have it turn OFF at a different frequency during deceleration. All transitions have hysteresis to avoid output chatter if the output frequency is near one of the thresholds.

Option	Terminal	Function Name	State	Description
Code	Symbol
01	FA1	Frequency Arrival	ON	when output to motor is at the set frequency
		Type 1 – Constant	OFF	when output to motor is OFF, or in any
		Speed		acceleration or deceleration ramp
02	FA2	Frequency Arrival	ON	when output to motor is at or above the set
		Type 2 – Over		frequency thresholds for, even if in acceleration or
		frequency		deceleration ramps
			OFF	when output to motor is OFF, or during
				acceleration or deceleration before the respective
				thresholds are crossed

andOperations Monitoring	Monitoring
and
Operations

Valid for inputs:	11, AL0 – AL2
Required settings	(none)

Notes:

ξFor most applications you will need to use only one type of frequency arrival outputs (see examples). However, it is possible assign both output terminals to output functions [FA1] and [FA2].

ξFor each frequency arrival threshold, the output anticipates the threshold (turns ON early) by 1.5Hz.

ξThe output turns OFF as the output frequency moves away from the threshold, delayed by 0.5Hz.

ξThe delay time of the output signal is 60 ms (nominal).

ξThe example circuit for terminal [11] drives a relay coil. Note the use of a diode to prevent the negative going turn-off spike generated by the coil from damaging the inverter’s output transistor.

Example for terminal [11] (default output configuration shown – see page 3-54):

Inverter output
terminal circuit	FA1
CM2	11

RY

Example for terminal [AL0], [AL1], [AL2] (requires output configuration – see page 54):

Inverter logic		FA1
circuit board
	AL0	AL1	AL2
	Power		Load
	supply

See I/O specs on page 4-6