Yokogawa µR20000 - Manual (Page 189)

IM 04P02B01-01E
9-6
Relatonal Computaton
The data that can be used in equations are measured values, computed values,
constants, communication input data, and remote control input terminal status. You
can specify a computing equation that performs relational computation on a computing
element. (Example: 01.LT.ABS(02))
Equaton Examples
02.LT.03
If the measured value of channel 2 is less than the measured value of channel 3, the
computed result is “1.” Otherwise, the result is “0.”
02.GT.03
If the measured value of channel 2 is greater than the measured value of channel 3, the
computed result is “1.” Otherwise, the result is “0.”
02.EQ.03
If the measured value of channel 2 is equal to the measured value of channel 3, the
computed result is “1.” Otherwise, the result is “0.”
02.NE.03
If the measured value of channel 2 is not equal to the measured value of channel 3, the
computed result is “1.” Otherwise, the result is “0.”
02.GE.03
If the measured value of channel 2 is greater than or equal to the measured value of
channel 3, the computed result is “1.” Otherwise, the result is “0.”
02.LE.03
If the measured value of channel 2 is less than or equal to the measured value of channel 3,
the computed result is “1.” Otherwise, the result is “0.”
Logcal Computaton
Checks whether the two data values, e1 and e2 (e1 only for NOT), are zeroes or
non-zeroes, and computes according to the conditions. The data that can be used in
equations are measured values, computed values, constants, communication input data,
and remote control input terminal status. You can specify a computing equation that
performs logical computation on a computing element.
AND
Logical Product
(Syntax) e1ANDe2
(Condition) If the two data values e1 and e2 are both non-zeroes, the computed
result is “1.” Otherwise, it is “0.”
(Explanation) e1 = 0
→ e1ANDe2 = 0
e2 = 0
e1 ≠ 0
→ e1ANDe2 = 0
e2 = 0
e1 = 0
→ e1ANDe2 = 0
e2 ≠ 0
e1 ≠ 0
→ e1ANDe2 = 1
e2 ≠ 0
9.2 Settng the Computng Equaton