Sonic Alert DCP301 user manual PID set selection, Soak guarantee soak

Chapter 5. FUNCTIONS

■PID set selection

•Eight sets of PID parameters, PID1 to PID8, are used for control operation. When the PID set No. is set to each seg- ment by designating the PID set segment, control output is calculated by each of the PID parameters.

•There are two ways of selecting PID sets: by designating the PID set segment and PID set auto-switching. The method can be selected by setting setup data C 1 1.

PID set No. 1 2 3 4

C1 1 set to 0: Designation of PID set segment

C1 1 set to 1: PID set auto-switching

These two methods cannot be set simultaneously.

Note

When setup data C 1 1 is set to 1, PID items in the program setup are not displayed.

•By designation of PID set segment, the PID set No. is set for each segment, and control output is calculated by each of the PID parameters.

•By PID set auto-switching, the SP full-scale is divided into eight zones according to the settings of C P . 1 1 to C P . 1 7, and the PID constant to be used according to the SP value is automatically selected to calculate the control output.

PID set segment designation

	Zone 8
C P. 1 7
	Zone 7
C P. 1 6
	Zone 6	All SP ranges
C P. 1 5
	Zone 5	are divided to
C P. 1 4		eight zones.
	Zone 4
C P. 1 3
	Zone 3
C P. 1 2
	Zone 2
C P. 1 1
	Zone 1

PID set automatic switching

■G.Soak (guarantee soak)

G.Soak ON/OFF and G.Soak width can be set for each seg- ment. The G.Soak time can also be set by the variable param- eter G S . t item.

The G.Soak function ensures a segment execution time with PV close to SP. G.Soak functions not only in soak segments but also in ramp segments.

At the segment start point, PV and SP are compared, and the absolute value of the resulting deviation continues for the G.Soak time or longer. When the absolute value is smaller than the G.Soak width, operation of that segment is started.

The controller is in the G.Soak standby state until this condi- tion is satisfied, and the linear lamp on the left of the profile display blinks. The operation state is the same as hold at the segment start point (time is set to 0). However, note that in the FAST mode, the controller does not enter the G.Soak standby state even if G.Soak is set to ON. The G.Soak standby state can also be canceled by external switch output. The following cancel conditions can be selected by the setup date C 5 2 to C 5 4 settings.

(1)G.Soak cancel when external switch input contact is ON or PV satisfies the G.Soak cancel conditions

(2)G.Soak cancel when external switch input contact is ON and PV satisfies the G.Soak cancel conditions

SP
G.Soak width	SP
G.Soak width	PV
	Segment set time
	Segment execution time
G.Soak standby time	Time count start
	Time

G.Soak at segment start point

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