Mitsubishi Electronics FR-F700 Pr. Regeneration avoidance, Free parameter, 882 to 886 function

Pr. Regeneration avoidance

882 to 886 function

Pr.882 Regeneration avoidance operation selection Pr.883 Regeneration avoidance operation level

Pr.884 Regeneration avoidance at deceleration detection sensitivity Pr.885 Regeneration avoidance compensation frequency limit value Pr.886 Regeneration avoidance voltage gain

This function detects a regeneration status and increases the frequency to avoid the regeneration status.

￿Possible to avoid regeneration by automatically increasing the frequency and continue operation if the fan happens to rotate faster than the set speed due to the effect of another fan in the same duct.

Pr.	Setting	Description
Number	Range
	0
882	(initial	Regeneration avoidance function invalid
	value)
	1	Regeneration avoidance function valid
		Set the bus voltage level at which regeneration
		avoidance operates. When the bus voltage level
883	300 to	is set to low, overvoltage error will be less apt to
	800V	occur. However, the actual deceleration time
		increases. The set value must be higher than the
		power supply valtage ×		2 .
	0	Regeneration avoidance by bus voltage change
	(initial
		ratio is invalid
	value)
884
		Set sensitivity to detect the bus voltage change
	1 to 5	Setting	1		5
		Detection sensitivity	low			high
	0 to 10Hz	Set the limit value of frequency which rises at
885		activation of regeneration avoidance function.
	9999	Frequency limit invalid
		Adjust responsiveness at activation of
		regeneration avoidance. A larger setting will

8860 to 200% improve responsiveness to the bus voltage change. However, the output frequency could become unstable.

Pr. 888, 889	Free parameter
Pr.888 Free parameter 1	Pr.889 Free parameter 2

Parameters you can use for your own purposes.

You can input any number within the setting range 0 to 9999. For example, the number can be used:

⋅As a unit number when multiple units are used.

⋅As a pattern number for each operation application when multiple units are used.

⋅As the year and month of introduction or inspection.

Pr.	891	Refer to the section about Pr. 52 and other
		relevant parameters.

Pr. 892 to 899 Energy saving monitor

Pr.892 Load factor

Pr.893 Energy saving monitor reference (motor capacity)

Pr.894 Control selection during commercial power-supply operation Pr.895 Power saving rate reference value

Pr.896 Power unit cost

Pr.897 Power saving monitor average time Pr.898 Power saving cumulative monitor clear Pr.899 Operation time rate (estimated value)

From the power consumption estimated value during commercial power supply operation, the energy saving effect by use of the inverter can be monitored/output.

⋅The following provides the items that can be monitored by the power saving monitor (Pr. 52, Pr. 54, Pr. 158 = "50").

(Only power saving and power saving average value can be output to Pr. 54 (terminal FM) and Pr. 158 (terminal AM))

Energy
Saving			Description and Formula					Increments
Monitor
Item
	Difference between the estimated value of
Power	power necessary for commercial power supply							0.01kW/
	operation and the input power calculated by the
saving	inverter							0.1kW*
	Power during commercial power supply
	operation - input power monitor
	Ratio of power saving on the assumption that
	power during commercial power supply
	operation is 100%
Power			Power saving				× 100
		Power during commercial power supply operation						0.1%
saving
rate	Ratio of power saving on the assumption that
	Pr. 893 is 100%
			Power saving	×100
			Pr.893
Power	Average value of power saving amount per hour
	during predetermined time (Pr. 897)							0.01kWh/
saving
			Σ (Power saving × ∆t)
average								0.1kWh*
value			Pr.897
	Ratio of power saving average value on the
	assumption that the value during commercial
	power supply operation is 100%
Power			Σ (Power saving × ∆t)		×100
saving			Pr.897					0.1%
rate
reference	Ratio of power saving average value on the
value	assumption that Pr. 893 is 100%
			Power saving average value			×100
			Pr.893
Power	Power saving average value represented in
saving								0.01/0.1*
charge	terms of charge
average	Power saving average value × Pr. 896
value

45 Pr. indicates simple mode parameters and Pr. indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.