Appendix 5. Integrator (It) Block; A5.1 Schematic Diagram Of Integrator Block - YOKOGAWA digitalYEWFLO Series User Manual

APPENDIX 5. INTEGRATOR (IT) BLOCK

The Integrator (IT) block adds two main inputs and
integrates them for output. The block compares the
integrated or accumulated value to TOTAL_SP and
PRE_TRIP and generates discrete output signals
OUT_TRIP or OUT_PTRIP when the limits are
reached.
The output is as represented by the following
equation (for counting upward and rate conversion).

A5.1 Schematic Diagram of Integrator Block

The following shows the schematic diagram of the Integrator block.
IN_1
REV_FLOW1
IN_2
REV_FLOW2
RESET_IN
RESET_CONFIRM
IN_1: Block input 1 (value and status)
IN_2: Block input 2 (value and status)
REV_FLOW1: Indicates whether the sign of IN_1 is
reversed. It is a discrete signal.
REV_FLOW2: Indicates whether the sign of IN_2 is
reversed. It is a discrete signal.
RESET_IN: Resets the integrated values. It is a
discrete signal.
RESET_CONFIRM: Reset confirmation input. It is a
discrete signal.
OUT: Block output (value and status)
OUT_PTRIP: Set if the target value exceeds PRE_
TRIP. It is a discrete signal.
OUT_TRIP: Set if the target value exceeds TOTAL_
SP (or 0). It is a discrete signal.
<APPENDIX 5. INTEGRATOR (IT) BLOCK>
INTEG_OPTS
(INPUT TYPE)
TIME_UNIT1
–1
Convert Rate
Reverse
Forward
Convert Accum
PULSE_VAL1
INTEG_OPTS
(INPUT TYPE)
TIME_UNIT2
–1
Convert Rate
Reverse
Forward
Convert Accum
PULSE_VAL2
Figure A5.1 Integrator Block
OUT.Value = Integration start value + Total
Total = Total + Current Integral
Current Integral = (x + y) × ∆t
x: IN_1 value whose unit has been converted
y: IN_2 value whose unit has been converted
∆t: block execution period
INTEG_TYPE
INTEG_OPTS (QUALITY)
GOOD_LIM
UNCERT_LIM
INTEG_OPTS
(FLOW TYPE) CLOCK_PER
Integrate
Add
TOTAL / RTOTAL
INTEG_OPTS
(CARRY)
OP_CMD_INT
UNIT_CONV
(RESET)
The Integrator block is classified into the following
five sections for each function:
• Input process section: Determines the
input value status, converts the rate and
accumulation, and determines the input flow
direction.
• Adder: Adds the two inputs.
• Integrator: Integrates the result of the adder into
the integrated value.
• Output process section: Determines the status
and value of each output parameter.
• Reset process section: Resets the integrated
values.
MAN
N_RESET
OUT
MAN
PRE_TRIP
OUT_PTRIP
Compare
MAN
TOTAL_SP
OUT_TRIP
Compare
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