Det-Tronics EQP Fire and Gas Detection/Releasing System SAFETY MANUAL - Manual (Page 22)

5.1 95-8599
BTWT Between Time Compare. There are three input time/date items. Two are
the comparison values and the third is the compare item. If the compare
item is equal to or between the comparison values, a Boolean True is
output, if not a Boolean False is output; e.g. if the <= input is 15:00:00
and the IN input is 12:00:00 and the >= input is 06:00:00 then the
output would be True.
No
CEIL Ceiling. This function performs a round up. The input is a float. The
result will be a double; e.g. –2.8 = -2, 2.8 = 3, -1 = -1
No
CTD Down Counter. There are three inputs. They are “count down (CD)”
a Boolean, the “Load (LD)” a Boolean, and the “Preset Value (PV)” a
double.
When the LD input is False, the counter counts down. One count for
each CD transition from False to True.
The output is True if the current value is less than or equal to zero. The
counter stops counting when the current value reaches -2,147,483,648.
When the LD is True, the PV is loaded into the current value to initialize
the counter.
No
CTD-SIL SIL Down Counter. The SIL Down Counter operates the same as the
standard CTD, but provides additional error checking in the Controller
against random memory error.
Yes
CTU Up Counter. There are three inputs. The “count up (CU)” a Boolean, the
“Reset (R)” a Boolean, and the “Preset Value (PV)” a double.
When the R input is False, the counter counts up. One count for each
CU transition from False to True.
The output is True if the current value is greater than or equal to
the PV. The counter stops counting when the current value reaches
2,147,483,647. When R is True the current value is set to 0.
No
CTU-SIL SIL Up Counter. The SIL Up Counter operates the same as the standard
CTU, but has additional error checking in the Controller against random
memory error.
Yes
CTUD Up/Down Counter. This has five inputs. The “count up (CU)” a Boolean,
the “count Down (CD)” a Boolean, the “Reset (R)” a Boolean, the “Load
(LD)” a Boolean and the “Preset Value(PV)” a double.
When the LD and R inputs both are False, the counter counts.
One count up for each CU transition from False to True.
One count down for each CD transition from False to True.
If both CU & CD transition, the counter will count up.
If the current value is greater than or equal to the PV, QU output is True.
If the current value is less than or equal to zero, QD output is True.
The counter stops counting when the current value reaches
2,147,483,647 or -2,147,483,648.
When the R is True the current value is set to zero.
When the LD is True the PV is loaded into the current value to initialize
the counter.
No
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