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App-2
Statistical operators within the group
Type
Operator
Example
Description
Maximum value CLOG.MAX() CLOG.MAX(G01) Obtain the maximum value of the measured data of group G01.
Minimum value CLOG.MIN()
CLOG.MIN(G02)
Obtain the minimum value of the measured data of group G02.
Max-min value
CLOG.P-P()
CLOG.P-P(G03)
Obtain the P-P value of the measured data of group G03.
Total value
CLOG.SUM() CLOG.SUM(G04) Obtain the total value of the measured data of group G04.
Average value
CLOG.AVE()
CLOG.AVE(G05) Obtain the average value of the measured data of group G05.
* Statistical computation of the measured data of the input channel within the same group measured at the
same time every specified interval.
Special operators
Type
Operator
Example
Description
Previous value* PRE()
PRE(001)
Obtain the previous measured data of channel 001
Hold**
HOLD():
HOLD(001):TLOG.SUM(002) When the measured value of channel 001 changes from
0 to a nonzero value, maintain the integrated value of the
measured data of channel 002 while the measured value
of channel 001 is nonzero.
Reset**
RESET():
RESET(001):TLOG.SUM(002) When the channel 001 = nonzero, reset the integrated
value of the measured data of channel 002
* Previously measured data or computed data. In the case of computed data, the value is set to 0 when the
computation is reset. At the start of the computation, if the computation was reset, the value is “0”. If it was
not reset, the value is the last value of the previous computation. The value that can be specified inside the()
is limited to the input channel number (001 to 030) or the computation channel number (A01 to A30). Each
computing equation can be used once.
** When specifying HOLD(A):B or RESET(A):B, A and B are channel numbers or computing equations.
These can be used once in the beginning of the computing equation.
Computing equations are set according to the following rules.
The number of computing equations
“30” computing equations can be set. Each computing equation is assigned a number. The numbers
are “A01” to “A30”. These numbers are called computation channel numbers.
Data to be computed
- Measured data
Specified with channel numbers (example: 030).
- Computed data
Specified with computation channel numbers.
- Constants
“30” constants for the DR130/DR230/DR240 can be set. Each constant is expressed by a number
from “K01” to “K30” .
Priority of operators
The priority of operators in a computing equation is as follows. The operators are placed in order
from the highest priority.
Type
Operators
Function
ABS(), SQR(), LOG(), LN(), EXP(), MAX(), MIN(), P-P(), SUM(), AVE(),
PRE(), HOLD():, RESET():
Exponentiation
**
Signs, logical negation
+, -, NOT
Multiplication, division
*, /
Addition, subtraction
+, -
Greater/less relation
.GT., .LT., .GE., .LE.
Equal/not equal relation
.EQ., .NE.
Logical product
AND
Logical sum, exclusive OR OR, XOR
Range when computing
When the value exceeds
±
10
38
during the computation, computation error (overflow) occurs.
App.1 Computing Equation
Summary of Contents for DR130 SERIES
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