Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 382)

App-13
IM 04L31A01-01E
Appendix
App
Equation Examples
01-02OR03.GT.04
Determines the OR of the computed results of “01-02” and “03.GT.04”.
TLOG Computation
The data that can be used in TLOG computation is only measured data, computed data,
or control data. In the explanation below, e1 is used to represent a measurement or
computation channel. You cannot specify an equation that contains a computing
element inside e1. In addition, only one TLOG computation can be specified in a single
computing equation.
TLOG.MAX( )
Maximum Value
(Syntax)
TLOG.MAX(e1)
(Condition) Determines the maximum value of channel e1.
TLOG.MIN( )
Minimum Value
(Syntax)
TLOG.MIN(e1)
(Condition) Determines the minimum value of channel e1.
TLOG.AVE( )
Average Value
(Syntax)
TLOG.AVE(e1)
(Condition) Determines the average value of channel e1.
TLOG.SUM( )
Sum Value
(Syntax)
TLOG.SUM(e1)
(Condition) Determines the sum of channel e1.
TLOG.P-P( )
Maximum - Minimum Value
(Syntax)
TLOG.P-P(e1)
(Condition) Determines the maximum - minimum value of channel e1.
Equation Examples
TLOG.MAX(01)+K01*SQR(02)
Examples of Equations That Are Not Allowed
TLOG.AVE(01)+TLOG.AVE(02)
Reason: TLOG appears twice in one equation.
TLOG.AVE(ABS(01))
Reason: A computing element is used inside the parentheses.
CLOG Computation (Control Computation)
Only measurement data and control measurement data can be used for CLOG
computations. In the following explanation, e1 is measurement data or control
measurement data. You cannot write an equation that includes computation elements
within e1. Also, you cannot add 2 or more CLOG computations in one equation.
However, in the following conditional expressions, multiple CLOG computations can be
used. Up to 10 computation data items can be used.
CLOG.MAX( )
Max. value
(Syntax)
CLOG.MAX(e1.e2.e4-e6)
(Conditions) Calculates the maximum value from channels e1, e2, e4, e5, and e6
that were measured at the same time.
Appendix 3 Meaning and Syntax of Equations