IM 01C25R03-01E
A-9
APPENDIX 2. INTEGRATOR (IT) BLOCK
APPENDIX 2. 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).
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
A2.1 Schematic Diagram of Integrator Block
The following shows the schematic diagram of the Integrator block.
OUT
IN_1
RESET_IN
REV_FLOW1
–1
TIME_UNIT2
IN_2
REV_FLOW2
PULSE_VAL2
–1
UNIT_CONV
OP_CMD_INT
(RESET)
INTEG_OPTS
(CARRY)
Reverse
Forward
Forward
OUT_PTRIP
OUT_TRIP
INTEG_OPTS
(FROW TYPE)
Add
Compare
Compare
TOTAL / RTOTAL
Integrate
INTEG_TYPE
INTEG_OPTS (QUALITY)
GOOD_LIM
UNCERT_LIM
CLOCK_PER
N_RESET
MAN
MAN
MAN
Convert Rate
Convert Accum
Convert Rate
Convert Accum
TOTAL_SP
PRE_TRIP
INTEG_OPTS
(INPUT TYPE)
PULSE_VAL1
TIME_UNIT1
INTEG_OPTS
(INPUT TYPE)
RESET_CONFIRM
Reverse
FA0201.EPS
Figure A2.1 Integrator Block
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.
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.
