Functions - ABB SM2000 User Manual Supplement

Videographic Recorders
SM1000 and SM2000
2.7 Functions – Table 2.4
All functions begin with an uppercase character to distinguish them from sources.
Function Description
Trigonometric Functions: – see Section 2.9.1, page 11
The sine of x (x specified in radians, Rad = π/180°)
Sin(x)
The cosine of x (x specified in radians, Rad = π/180°)
Cos(x)
The tangent of x (x specified in radians, Rad = π/180°)
Tan(x)
Statistical Functions: – see Section 2.9.2, page 11
Avg(x, n, t) The average of variable x, over n samples at a sample rate of t seconds. n=1 to 9999 samples, t=1 to 9999 seconds.
The average resets after n samples.
Rav(x, n, t) The rolling average of variable x, over n samples at a sample rate of t seconds. The oldest sample in each Rav calculation is
lost and the new result is calculated by taking into account the current sample. N=1 to 9999 samples, T=1 to 9999 seconds.
Sd(x, n, t) Standard Deviation of variable x, over n samples at a sample rate of t seconds. N = 1 to 200 samples; t = 1 to 9999 seconds.
Logarithmic Functions: – see Section 2.9.3, page 11
Log(x) Log base 10 of x. For Antilog, see X
Ln(x) Natural log of x
Exp(x) e to the power x
Special Functions: – see Section 2.9.4, page 11
RH(x, y) Relative humidity calculation using wet(x) & dry(y) bulb readings
F0(x, y, z) Optimization of sterilization times using F0 calculation and measured temperature(x), target temperature(y) and Z factor(z)
Abs(x) The absolute value of variable x
Switch Functions: – see Section 2.9.6, page 15
Hs(x, y, z) Returns the variable with the greatest magnitude
Ms(x, y, z) Returns the variable whose magnitude is between the upper & lower limits of the three variables
Ls(x, y, z) Returns the variable with the smallest magnitude
Mux(x, y, s) Selects x if s is false, otherwise y
Power Functions:
a
X (x, a) Raises the variable x to the power a
Sqr(x) Returns the square root of variable x
Table 2.4 Functions
6
a
(x, a)
2 Math Configuration
IM/SM2000ADV Issue 7