Yokogawa AXFA14G/C - Manual (Page 71)

IM 01E20F02-01E A-12
APPENDIX 2. INTEGRATOR (IT) BLOCK
A2.5.2 Determining the Output Value
The value of OUT.Value is determined as follows:
᭹ For counting up
OUT = integration start value (0) + Total
᭹ For counting down
OUT = integration start value (TOTAL_SP) -
Total
OUT_TRIP(#14):0
OUT_PTRIP(#15):0
OUT_TRIP(#14):1
OUT_PTRIP(#15):1
Counting up starting from 0
• For counting up
PRE_TRIP(#31)
OUT_TRIP(#14):0
OUT_PTRIP(#15):0
OUT_TRIP(#14):0
OUT_PTRIP(#15):1
OUT_TRIP(#14):1
OUT_PTRIP(#15):1
• For counting down
Counting down starting from TOTAL_SP
PRE_TRIP(#31)
0
0 TOTAL_SP(#7)
TOTAL_SP(#7)
FA0205.EPS
OUT_TRIP(#14):0
OUT_PTRIP(#15):1
Total: Total of integrated values. This value is
retained even if INTEG_TYPE is changed during
integration
(in AUTO).
If OUT is rewritten in the MAN mode, integration
starts with the value rewritten in MAN mode after the
mode was returned to AUTO.
The values in OUT_TRIP and OUT_PTRIP are
determined according to the correlation between OUT
and TOTAL_SP/PRE_TRIP.
For counting up, the OUT value is as follows:
᭹ OUT < TOTAL_SP - PRE_TRIP
⇒OUT_TRIP = 0, COUT_PTRIP = 0
᭹ TOTAL_SP - PRE_TRIP <= OUT <
TOTAL_SP
⇒OUT_TRIP = 0, COUT_PTRIP = 1
᭹ TOTAL_SP <= OUT
⇒OUT_TRIP = 1, COUT_PTRIP = 1
For counting down, the OUT value is as follows:
᭹ PRE_TRIP < OUT
⇒OUT_TRIP = 0, COUT_PTRIP = 0
᭹ 0 < OUT <= PRE_TRIP
⇒OUT_TRIP = 0, COUT_PTRIP = 1
᭹OUT <= 0
⇒OUT_TRIP = 1, COUT_PTRIP = 1
Note that the given conditions do not apply to the
following cases:
• If INTEG_TYPE is 5, 6, or 7, OUT_TRIP and
OUT_PTRIP always output "0."
• If INTEG_TYPE is 1 or 3, occurrence of
AutoRESET (reset caused if the threshold is
exceeded) causes OUT_TRIP to hold "1" for five
seconds.