Siemens FEC920 User Manual page 94

Disable
Note: The formula linking Input1 and PV is:
PV Increment each 0.125Sec = Input1/(8*Period(Sec) * UnitsScaler).
There is no reason why the Period and UnitsScaler parameters have to be used only in the
way described above, one reflecting the units used by the input channel and the other linked
directly to the output units required. There may be application where they may be used in other
ways. Use Table 1, which shows the divisor associated with a particular selection for Period,
in combination with a custom value as the UnitsScaler to generate a custom overall divisor.
Page 86
FEC920: USER GUIDE
Allows the user temporarily to suspend totalizing action. The totalizer is toggled between
being enabled (cross symbol) and disabled (tick symbol) by means of the scroll key. The
output retains the pre-disabled value until the totalizer is re-enabled, when it resumes from
that value, or until the value is changed using the Preset parameter mentioned above. In
the latter event, it will still be necessary to enable the totalization by setting the Disable
parameter to the cross symbol again.
Sec Divider Sec
0.125 1 1
0.25 2 2
0.5 4 5
10
20
30
The selections in Bold Italic font are those which set the calculation into common time
units, Second, Minute, Hour and Day (24Hours), and are probably going to be the most
commonly selected. The other selections may be useful for more unusual applications.
A5E45696052A Rev-AA
Table 1: Period
Divider Min Divider
8 1 480
16 2 960
40 5 2400
80 10 480
160 20 960
240 30 1440
Hour Divider
1 2880
2 5760
6 17280
12 34560
24 69120
September 18