Yokogawa µR20000 - Manual (Page 42)

IM 04P02B01-01E
For the procedure to set the functions, see section 1.10, “Function Setup Guide.”
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1.6 Computaton Functon (/M1 Opton)
Computaton Functon
Computing equations can be set up using measured values and other computed values
as variables in computation-dedicated channels, and the computation can be executed.
The computed result can be recorded. Computation is performed every scan interval.
Channels Dedcated to Computatons
The computation-dedicated channels below can be used.
Model Number of Channels Channel Names
Pen model 8 0A, 0B, 0C, 0D, 0E, 0F, 0G, and 0J
Dot model 24 0A, 0B, 0C, 0D, 0E, 0F, 0G, 0J, 0K, 0M, 0N, 0P,
1A, 1B, 1C, 1D, 1E, 1F, 1G, 1J, 1K, 1M, 1N, and 1P
Types of Computatons
In the table below, y represents the computed result. X and n represent the measured
value, a constant, etc.
Type Syntax n the
Equaton
Descrpton
Four arithmetic
operation
+, –, *, / Determines addition, subtraction, multiplication, and
division.
Power ** Determines the power. y = X n
Square root SQR() Determines the square root.
Absolute value ABS() Determines the absolute value.
Common logarithm LOG() Determines the common logarithm. y=log
10
x
Exponent EXP() Determines the exponent. y = e x
Relational
computation
.LT., .LE., .GT.,
.GE., .EQ., .NE.
Determines <, ≤, >, or ≥ of two elements and outputs “0”
or “1.”
Logical computation AND, OR, XOR,
NOT
Determines the AND (logical product), OR (logical sum),
XOR (exclusive logical sum) of two elements,
NOT (negation) of an element and outputs “0” or “1.”
TLOG computation TLOG.SUM(),
TLOG.MAX(),
TLOG.MIN(),
TLOG.AVE(),
TLOG.P-P(),
Determines the sum (SUM), the maximum (MAX),
the minimum (MIN), the average (AVE),
and the maximum – minimum (P-P) at specified time
intervals. There are three timers for setting the interval.
Data That Can Be Used n Equatons
In TLOG computation, the measured values of measurement channels or computed
values of computation channels can only be used. For all other computations, all of the
data types below can be used.
• Measured Values on Measurement Channels
Specified by the channel number. For channels that have scaling enabled, the scaled
values are used in the computation.
• Computed Values on Computaton Channels
Specified by the channel number.
• Constants (K01 to K30)
The values assigned to K01 to K30 can be used as constants.
Range of values (maximum significant digits is 5):
–9.9999E+29 to –1.0000E–30, 0, 1.0000E–30 to 9.9999E+29