Toshiba PROSEC T3H user manual Operation, Asv ← Isv

2. Expanded Functions

B+8 Initial status STS

F C 8 4 0

Initial operation mode 00 : Manual mode

01 : Auto mode

10 : Cascade mode

11 : (Reserve)

Direct / reverse selection

		0 : Direct
		1 : Reverse
B+9	MV upper limit MH (-25.00 to 125.00 %)	Data range: -2500 to 12500
B+10	MV lower limit ML (-25.00 to 125.00 %)	Data range: -2500 to 12500
B+11	MV differential limit DMV (0.00 to 100.00 %/∆ t)	Data range:	0 to 10000
B+12	Control interval setting n (1 to 32767 times)	Data range:	1 to 32767
	Executes PID every n scan. Therefore, control interval ∆ t = n ⋅ constant scan interval
	(It is treated as n = 1 when n ≤ 0)
C	Manipulation value MV (-25.00 to 125.00 %)	Data range: -2500 to 12500
C+1

:Internal work area

C+9

Operation

1. When the instruction input is OFF:
Initializes the PID3 instruction.
Operation mode is set as specified by B+8.	A+5 bit 0, 1 ← B+8 bit 0, 1
Auto mode SV is set as specified by B+4.	ASV ←	ISV
Manual mode MV is set as current MV.	MMV ←	MV
Internal calculation data is initialized.
MV remains unchanged.

2.When the instruction input is ON:

Executes PID calculation every n scan which is specified by B+12. The following operation modes are available according to the setting of A+5.

•Auto mode

This is a normal PID control mode with ASV as set value.

Set value differential limit DSV, manipulation value upper/lower limit MH/ML and differential limit DMV are effective.

Bump-less changing from auto mode to manual mode is available. (Manual mode manipulation value

MMV is over-written by current MV automatically. MMV ← MV)

User’s Manual 49