IM 01C25T02-01E
A-18
Appendix 2. Integrator (IT) Block
A2.6.3 Reset Process
The basic reset process sequence is as follows:
1.) Snapshot
2.) Clearing the integrated values
3.) Reset count increment
4.) Judging OUT_TRIP and OUT_PTRIP (see A2.5)
1.) Snapshot
Saves the following values in the specified parameters before clearing the integrated values. These values will be
retained until the next reset is made.
STOTAL = Total
SRTOTAL = RTotal
SSP = TOTAL_SP
2.) Clearing the integrated values
The reset process clears the Total, ATotal, and RTotal values in the internal registers.
Total = 0
ATotal = 0
RTotal = 0
3.) Reset count increment
Each time a reset is made, the N_RESET parameter will be incremented.
The high limit is 999,999, and if this limit is exceeded, the count returns to "0."
4.) Judging OUT_TRIP and OUT_PTRIP (see A2.5)
OUT_TRIP and OUT_PTRIP are judged again on the basis of the cleared integrated values.
There are three options relating to a reset:
i Confirm reset (bit 8 of INTEG_OPTS)
ii Carry (bit 6 of INTEG_OPTS)
iii Generate reset event (bit 9 of INTEG_OPTS)
i Confirm reset (bit 8 of INTEG_OPTS)
If this option is enabled, the next reset is rejected until "1" is set to RESET_CONFIRM.
ii Carry (bit 6 of INTEG_OPTS)
If this option is enabled while INTEG_TYPE is UP_AUTO or DN_AUTO, the value exceeding the threshold
at a reset will be carried into the next integration.
If INTEG_TYPE is any setting other than UP_AUTO or DN_AUTO, this option is irrelevant.
iii Generate reset event (bit 9 of INTEG_OPTS)
If this option is enabled, an alert event is generated if a reset occurs.
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