IM 01C25R03-01E
A-16
APPENDIX 2. INTEGRATOR (IT) BLOCK
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.
A2.5.3 Mode Handling
Mode
Action
Output
Normal action
Normal output
Integration calculation is stopped.
OUT will not be updated unless you
set a value to it. No reset is accepted.
You may rewrite a value in OUT. If no value is rewritten, the value just before
running in AUTO is held. When the mode returns to AUTO, integration
starts with the written value or the value just before running in AUTO.
Automatic (AUTO)
Manual (MAN)
Out of Service (O/S)
TA0204.EPS
If you rewrite the value in OUT and RTOTAL while the mode is in MAN or O/S, N_RESET is incremented.
