Toshiba PROSEC T3H user manual Control block diagram, Algorithm

2. Expanded Functions

Control block diagram

				Auto
ASV				mode
		DSV
	Differential				SVn	+
CSV						-
		Cascade
			mode

PVn

Integral control

Integral
1
TI⋅s	∆ In

		Proportional				+
	en		1		∆ Pn +
Gap								KP
						-
			Derivative
				TD⋅s	∆ Dn
				1+η⋅ TD⋅s
				(η = 0.1)
							PVC
		1

1+T⋅s

Digtal filter

MVn

∆

M

Vn

MVCn

MVS

H/L

DMV

MV

MMV

DMMV

Manual

Differential limit

mode

MVS:

Velocity →

Position

H/L:

MVn = MVn-1± ∆ MVn

Upper / lower limit

DMV:

Differential limit

Integral action control:

When MV is limited (H/L, DMV) and the integral value has same sign as limit over, integral action is stopped.

Velocity → Position conversion:		MVn = MVn-1	- ∆ MVn
In Direct mode, MV increases when PV is increased.	→
In Reverse mode, MV decreases when PV is increased.	→	MVn = MVn-1	+ ∆ MVn
Gap (dead-band) operation:
Error e

SV - PV

GP (%) GP (%)

Algorithm

Digital filter:

PVn = (1− FT⋅) PVC+ FT⋅ PVn − 1

Here,

0.000 ≤ FT≤ 0.999

User’s Manual 47