Eurotherm 6100, User Manual

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100/180MM DISTRIBUTED GRAPHIC RECORDER: USER GUIDE
Page 102 HA029324
Issue 11 Oct 14
4.3.11 FUNCTION (Cont.)
PV FORMAT
Numeric Provides a decimal value for the maths channel.
Elapsed time Shows the maths channel value in HH:MM:SS (hours minutes, seconds) format. Normally used
only for time functions. For other functions, elapsed time counts in milliseconds e.g. a PV of
10000 would be displayed as 00:00:10; a PV of 60000 would be displayed as 00:01:00
Scientifi c Values are displayed and entered as a decimal number between 1.0 and 10† (the mantissa),
followed by a multiplier (the exponent). E.G. to enter a value of 1244.5678, the value entered
would be 1.2445678E3, where 3 represents the number of places that the decimal point must
be shifted to the left in order to convert the value to a number between 1 and 10†. To enter a
value of 0.0004196, the entry would be 4.196E-4.
Time/date For timestamp functions, displays the timestamp as time or date as selected, instead of a
number of milliseconds, as would be displayed in numeric format.
† Notes
1. Strictly this is a number less than 10, as 10 would be 1.0E1.
2. There must be at least one number after the decimal point.
REMAINING CONFIGURATION ITEMS
The remaining confi guration items are identical with the relevant items in Input Channel confi guration
(
section 4.3.3 ).
FUNCTION DETAILS
POLYNOMIAL FIT
A polynomial curve fi t of up to eight orders:
A0 + A1(X) + A2(X 2 ) + A3(X 3 ) + A4(X 4 ) + A5(X 5 ) + A6(X 6 ) + A7(X 7 ) + A8(X 8 ) where X is the value of the
source channel and A0 to A8 are constants. Figure 4.11.3b shows the confi guration items for a third order
fi t with channel 2 used as the source (X), and A0 = 1, A1 = 2, A2 = 3 and A3 = 4.
Function Polynomial
Orders
Polynomial of
A0
Math 1
0
1
3
1
Maths Number
1) Math 1
Value
OFF
Channel 2
A1
2
A2
3
A3
4
Units
Figure 4.3.11b Polynomial confi guration fi elds (3rd order)