PROGRAMMING MODULE #5 - PROGRAM TOTALIZER
/
INTEGRATOR
Programming for the totalizer/integrator consists of four programming steps:
decimal point position, time base, scale factor and low signal disable. Note that
the decimal point position of the integrator/totalizer can be set independent of the
decimal point position of the input. The totalizer will roll over and flash when the
total exceeds, 999999 or -99999, indicating an overflow condition.
PROGRAM DECIMAL POINT POSITION FOR THE
TOTALIZER
The decimal point positions for the totalizer are as follows:
“dECPNt” < > “0”
“0.0”
“0.00”
“0.000”
“0.0000”
PROGRAM TOTALIZER/INTEGRATOR TIME BASE
The time base determines the rate at which readings increase. The totalizer
display is updated 2 1/2 times per second regardless of time base selected, but
longer time bases decrease the magnitude of each increase. The three time bases
are per second, per minute and per hour. A constant signal input of 1000 units, for
example, would totalize to 1000 units in one second
(with a TB of 1 sec.)
, 1000
units in one minute
(with a TB of 1 min.)
, and 1000 units in one hour
(with a TB of
1 hr.)
.
Note: Input changes can be made synchronous to the display by programming
E1 or optional E2-CON pin for function 13, Instrument reading
synchronization.
A multiplying scale factor may be used to span the standard time ranges
(or
divide if scale factor < 1)
. The following equation expresses the totalization
process.
S.F. =
D.T.
x
T.B.
x
D.T.D.P.
I.D.
TIME
I.D.D.P.
S.F. = Programmable Scale Factor
D.T. = Desired Totalizer Value for a
fixed time duration
T.B. = Programmable Time Base
If Program Select Number Chosen Is:
Enter in Formula
“0” for sec.
1
“1” for min.
60
“2” for hr.
3600
I.D. = Input Display Value
TIME = Actual Time period in seconds
-13-
“11” - A negative going edge zeros
(tares)
the input signal and adds
the value that was in the input display to the totalizer value
every time this operation is performed. The time-base, scale
factor and low cut-out in
“Module #5”
are in effectively
disabled, when this function is selected
“12” - Display hold with tare. A negative going edge tares
(zeros)
the input signal. Prior to the tare operation, the input signal is
saved and held
(display hold)
as long as the remote input pin is
low. On the positive edge the input display will show zero. If
there is an increase to the input signal while the remote input is
low, the display will reflect
(show)
the increase at the positive
edge.
“13” - Instrument reading synchronization. A low level disables all
meter operations
(alarms, total, analog out, etc.)
. A positive
edge resets the start of the A/D conversion, to allow
synchronization with external process and controls. While in
this function, the other E-CON pin is operational.
“E2-CON” < > - If the E2-CON option is installed, E2-CON has the same
programmable functions as E1-CON.