Users Guide Instruction Manual

IB-23C650
TOTALIZER OPERATION
Preset Value
The preset value is the number from which the totalizer starts counting after a
wrap or when the totalizer was first initiated. This value is typically 0. Leading
zeros are not suppressed.
Predetermined Count
The predetermined count is the value at which the totalizer resets and starts
over when the wrap function is enabled. If a totalizer event relay is enabled in
the RELAYS MENU, the relay transfers to signal that the predetermined count
has been reached.
The predetermined count has the same form as the preset value, and its
decimal point location is the same as the decimal location in the process
variable engineering units. Setup entries for the predetermined count are
made in the same manner as for the preset value, and all the same limitations
apply.
When the wrap function is enabled, entries for the predetermined count are
restricted as follows:
1. The predetermined count must not be equal to the preset value. The
totalizer cannot be turned on if this condition exists.
2. The predetermined count must be greater than the preset value if the
totalizer is configured to count up, and less than the preset value if the
totalizer counts down. For example, if the preset value is 100 and the
predetermined count is zero, the totalizer must count down. If it is
configured to count up, it cannot be turned on.
3. The predetermined count must be set at a value which makes the
difference between the preset value and the predetermined count greater
than the maximum value of the process variable engineering units to
make the totalizer relay function correctly.
If the wrap function is not enabled, violation of restrictions 1 and 2 will not
prevent the totalizer from being turned on. Restriction 3 does not apply when
wrap is off. The relay will function correctly for any predetermined count value
except the value which equals the preset value.
Totalizer Digital Input Function
Digital input 1 or 2 can be used to control the totalizer status ((Run/Stop,
Run/Hold, Run/Skip). The front panel can also be locked out. See digital input
setup (Table 3) for details.
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