YOKOGAWA DpharpEJX vigilantplant EJX Series - A2.4 Integrator

IM 01C25T02-01E
A-13
Appendix 2. Integrator (IT) Block
A2.4 Integrator
When addition is complete, its result will be passed to the integrator.
Integration consists of combinations of a reset method and counting up/down. There are the following seven integration
types, which can be set using INTEG_TYPE.
1. UP_AUTO : Counts up with automatic reset when TOTAL_SP is reached
2. UP_DEM : Counts up with demand reset
3. DN_AUTO : Counts down with automatic reset when zero is reached
4. DN_DEM : Counts down with demand reset
5. PERIODIC : Counts up and is reset periodically according to CLOCK_PER
6. DEMAND : Counts up and is reset on demand
7. PER&DEM : Counts up and is reset periodically or on demand
Each type of integration is independently run as a function.
There are the following four types of integrated values:
1. Total: Integrates the result of the adder as is.
2. ATotal: Integrates the absolute value of the result of the adder.
3. RTotal: Integrates the absolute value of the result of the adder only if the status of the result is "Bad."
This value is used for the RTOTAL value.
4. AccTotal: An extension function. The result of the adder is integrated as is and will not be reset.
The value is used for the ACCUM_TOTAL (expanded parameter) value.
The table A2.1 shows the details of INTEG_TYPE.
Table A2.1 INTEG_TYPE
Name Integration Method Integration Range
Reset Trigger (Reset if one of the
following conditions is established)
Trip Output
UP_AUTO(1)
Counting up
Starting from "0"
-INF< Total <TOTAL_SP
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• OUT reaches TOTAL_SP.
• RESET_IN = 1
• OP_CMD_INT = 1

UP_DEM(2)
Counting up
Starting from "0"
-INF< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• RESET_IN = 1
• OP_CMD_INT = 1

DN_AUTO(3)
Counting down
Starting from
TOTAL_SP
0< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• OUT reaches "0."
• RESET_IN = 1
• OP_CMD_INT = 1

DN_DEM(4)
Counting down
Starting from
TOTAL_SP
-INF< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• RESET_IN = 1
• OP_CMD_INT = 1

PERIODIC(5)
Counting up
Starting from "0"
-INF< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• At the period specified by
CLOCK_PER
• OP_CMD_INT = 1

DEMAND(6)
Counting up
Starting from "0"
-INF< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
• RESET_IN = 1
• OP_CMD_INT = 1

PER&DEM(7)
Legend : Trip output is made. : No trip output is made.
Counting up
Starting from "0"
-INF< Total <+INF
0< ATotal <+INF
0< RTotal <+INF
-INF< AccTotal <+INF
•
At the period specified by CLOCK_PER
• RESET_IN = 1
• OP_CMD_INT = 1

TA 0203.EPS