Rockwell Automation 1746-BTM Barrel Temperature Control Module User Manual - Manual (Page 36)

Publication 1746-UM010B-EN-P - April 2001
3-10 Configuring the Module
Implied Decimal Point
When entering or reading integer values, the range, given in Table
3.A, provides the implied decimal point. It is the number of digits to
the right of the decimal point (for an example (IDP) range of 0.0 thru
3276.7, the implied decimal point is 1).
Status values are similarly read. You must know the range of the value
to read it correctly. For example, if reading a heat integral (0.0000 thru
3.2767), a display of 5000 would have a value of 0.5.
IMPORTANT
Because loop values are stored and reported in
integer files, you must understand the meaning of
implied decimal point (IDP). Otherwise, the
magnitude of your intended value may be in error by
as much as 1000, depending on the position of the
IDP.
Table 3.A Implied Decimal Point Examples
Parameter Given Range
IDP
(1) Example
Thermal Integrity
0 thru 100
o 0
If you want to store a value of 66
o
, enter 00066.
Standby Setpoint
0.0 thru 32767.7
o 1
If you want to store a value of 660.0
o
, enter 06600.
TPO Period 0.00 thru 100.00
sec. 2 If you want to store a value of 6 seconds, enter
00600.
Cool Proportional 0.000 thru 32.767 3 If you want to store a value of 18, enter 18000.
Heat Integral 0.0000 thru 3.2767 4 If you want to store a value of 0.5, enter 05000.
(1)
IDP indicates the number of digits from the right that locates the implied decimal point.