Sonic Alert DCP301 user manual F F

Chapter 7. PARAMETER SETUP

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• ON-OFF control differential

When P is set to 0.0 on both 0D and 6D output models, control is set to ON-OFF control, and operational period at that time is set.

Reverse action

ON

OFF

Differential

gap

PV

SP

Direct action

ON

OFF

Differential

gap

PV

SP

• Position-proportional control dead zone

On 2G output models, a dead zone between the motor open and motor closed positions is set.

As a general guideline, the minimum value is the value where this dead zone changes to stop motor hunting once a fixed value set to manual output is being output.

If this value is set without any margin, the motor will be operating at all times, which will considerably shorten its service life.

The factory setting is 5%. Use this as a guideline, and take the control results and motor service life into consideration when setting the dead zone.

		Dead zone		*: Dead zone setting value
Closed-side				Open-side
relay ON				relay ON
					Control output (%)
	*		*
		MFB (%)

• Heat/cool control dead zone

On heat/cool models, this sets how the relationship between heat-side output and cool- side output should be processed with respect to the MV resulting from PID operation. Heat-cool control is calculated as follows:

Heat-side PID set

Note 4)

PID set selection (1 of 4 sets)

Cool-side

PID set

Note 3)

Note 2)

PV

SP

Constants P, I, D, Re			Heat-side PID set		Cool-side PID set
			Constants OL, OH		Constants OL, OH
							Heat-side
PID operation
				Heat-cool output calculation			output
(fixed to reverse action)		MV
							Cool-side
	(PID operation result)					Note 1)	output

Dead zone

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