Honeywell SLG 700 Option Manual page 110

Resetting the totals
The block uses a discrete input RESET_IN to reset the internal integration registers. The operator can
send a command to reset the same registers by making OP_CMD_INT = RESET. This is a
momentary switch that turns-off when the block is evaluated. The option "Confirm Reset" in
INTEG_OPTS, if set, prevents another reset from occurring until the value 1 has been written to
RESET_CONFIRM. This is an input that behaves like a momentary dynamic parameter if it is not
connected.
The number of resets is counted in the register N_RESET. This counter cannot be written or reset. It
provides verification that the total has not been reset since N_RESET was last checked. The counter
must roll over from 999999 to 0.
The reset always clears the internal registers Total, Atotal, and Rtotal, except that when the option
UP_AUTO or DN_AUTO is selected, a residual value beyond the trip value may be carried to the
next integration if the option Carry is set in INTEG_OPTS. In this case, TOTAL_SP is subtracted
from Total, leaving the residual value.
Batch totalizer outputs
When the integration is counting up (type 1 or 2) and the value of OUT equals or exceeds a value
given by TOTAL_SP minus PRE_TRIP, the discrete output OUT_PTRIP is set. When it equals or
exceeds a value given by the parameter TOTAL_SP, the discrete output OUT_TRIP is set.
OUT_PTRIP remains set.
When the integration is counting down (type 3 or 4), it starts from a value given by TOTAL_SP.
When the value of OUT is equal to or less than PRE_TRIP, the discrete output OUT_PTRIP is set.
When the count reaches zero, the discrete output OUT_TRIP is set. OUT_PTRIP remains set. When
a reset occurs, the comparisons that set OUT_PTRIP and OUT_TRIP are no longer True; so they are
cleared. OUT_TRIP shall remain set for five seconds after an automatic reset (type 1 or 3), if
RESET_CONFIRM is not connected or the option to "Confirm Reset" in INTEG_OPTS is not set.
To determine the amount of Uncertain or Bad readings, the block integrates the variables with Bad,
or Bad and Uncertain status separately. The values used in this second integration are the values with
Good status, just before the status changed from Good to Bad or Good to Uncertain. The ratio of
Good to total counts determines the output status. Absolute values are used to avoid problems with
changing signs.
Integration options
Any or all of the following integration options can be selected:
INTEG_OPTS: 0 (Input1 Accumulate)
When this option is selected, the accumulation of pulses is done instead of the rate input, integration.
INTEG_OPTS: 0 (Input2 Accumulate)
When this option is selected, the accumulation of pulses is done instead of the rate input, integration.
Note:
One input for rate and input for Accumulation can be selected.
INTEG_OPTS: 0 (Flow forward)
When this option is selected, only positive flows is considered for integration. If there is no forward
flow inputs (whose value is positive value), and if one inputs is negative (whose value is positive
value) the integration continues.
Note:
If both the inputs are negative, then the integration stops.
Page 94 FOUNDATION Fieldbus Option User's Manual Rev.5