Apollo IMY Module #5 Program INTEGRATOR/TOTALIZER, Program INTEGRATOR/TOTALIZER Time Base

MODULE #5 - PROGRAM INTEGRATOR/TOTALIZER

Programming for the integrator/totalizer consists of four programming steps: totalizer decimal point position, time base, scale factor and low temperature 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 value will roll over and flash when the total exceeds, 999999 or -99999, indicating an overflow condition. Reverse signal input will cause the totalizer value to count in the opposite direction and eventually no longer be in an overflow condition.

PROGRAM DECIMAL POINT POSITION FOR THE INTEGRATOR/TOTALIZER

The decimal point position for the totalizer are as follows:

“dECPNt” < > “0” “0.0” “0.00” “0.000” “0.0000”

PROGRAM INTEGRATOR/TOTALIZER TIME BASE

The time base determines the rate at which readings increase. The integrator/totalizer display is updated 2 12 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 input temperature of 100￿￿ for example, would integrate/totalize to ￿￿￿￿ in one second (with a TB of 1 sec.), 100￿ in one minute (with a TB of 1 min.), and 100￿ 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 integration/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

-13-

TB = 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
D.T.D.P. = Desired Totalizer Value Decimal Point	Enter in Formula
0	1
0.0	10
0.00	100
0.000	1000
0.0000	10000
I.D.D.P. = Input Display Value Decimal Point	Enter in Formula
0	1
0.0	10

“tbASE” < > “0” - per second “1” - per minute “2” - per hour

PROGRAM THE INTEGRATOR/TOTALIZER SCALE FACTOR As explained in the previous programming step, a multiplying scale factor can be used to scale the update rate as required. This may be used to span the standard ranges. A scale factor of “1.000” has no effect on the standard ranges.

“SCLFAC” < > “0.001” to “100.000”

PROGRAM THE LOW-END CUTOUT (low temperature level disable)

In order to prevent false integration/totalization in situations where integration/totalization is undesirable, a programmable setpoint can be used to disable integration/totalization when the input temperature falls below this low-end cutout level.

“Lo-cut” < > “-999” to “9999”