IDL 101
FUNCTIONAL DESCRIPTION
HB_IDL101_E_V222.doc
49
Gantner Instruments Test & Measurement GmbH
6.4. Arithmetic Channel
By means of the Arithmetic Variables sensor variables and constants can be connected with each other via arithmetic
operations. The result is allocated to the Arithmetic Variable. The formula can contain up to 10 operands. The
calculation will be performed with a stack depth of 10. The value is handled as a 4-byte floating point format with 24
significant bits according to IEEE, standard 754. The full scale is -10
37
to +10
37
.
Arithmetic operations overview:
operator
sign
time
ad
0.80
ms
subtraction -
0.80
ms
multiplication *
0.80
ms
division /
1.10
ms
modulo %
0.90
ms
square root
sqrt
2.68 ms
exponential function to base e
exp
3.92 ms
absolute value
abs
0.10 ms
logarithm to base e
ln
3.70 ms
logarithm to base 10
log
3.80 ms
integrator integ
0.20
ms
differentiator deriv
0.20
ms
sine sin
3.20
ms
cosine cos
3.60
ms
tangent tan
3.60
ms
Inverse sine
arcsin
3.20 ms
Inverse cosine
arccos
7.00 ms
Inverse tangent
arctan
3.20 ms
minimum value (“pull-pointer“)
min
0.20 ms
maximum value (“pull-pointer“)
max
0.20 ms
lowest value
low
1.50 ms
highest value
high
1.50 ms
Xy power
8.80
ms
Time (seconds of day)
SecondsOfDay
1.10 ms
Sample rate
SampleTime
0.10 ms
Free space on the Flash card
PCMCIASpace
0.90 ms
Free RAM memory
RAMSpace
1.70 ms
Application specific function 1
Spec1
1)
Application specific function 2
Spec2
1)
Application specific function 3
Spec3
1)
Application specific function 4
Spec4
1)
1)
No specifications available as the time depends to the specific function and the program.
Table 6.3 Arithmetic operators and the calculation times
