Yokogawa Standalone MW100 User Manual
Page 83
1-69
IM MW100-01E
Explanation of Functions
1
2
3
4
5
App
Index
Processing Computed Results with Abnormal Input Values or Overflow Values
You can select the computed result when an error occurs on the reference channel
(measurement or MATH channel) of a MATH channel.
For processing of computed results, see “MATH Operation Settings” in section 3.4.
MATH Operation
You can select the computed data when the computed result is an error.
Choice for the Computed Result
Notation
Plus over
+Over
Minus over
–Over
Computation Operation of TLOG.PSUM
You can select the computed data when the computed result of the TLOG.PSUM
computation exceeds the MATH span setting range.
Notation Minimum value
*1
Maximum value
*1
Description
Over
–9999999
99999999
When the result is less than the minimum
value, computation stops as an overflow
Computed result: –OVER
When the maximum value is exceeded,
computation stops as an overflow
Computed result: +OVER
Rotate
0
99999999
When the minimum value is not reached,
computation continues with the next count
being the maximum value.
When the maximum value is exceeded,
computation continues with the next count
being the minimum value.
*1 The minimum and maximum values vary depending on the decimal place.
For the MATH span setting range, see “MATH Span” in this section
Special Processing of the Computed Result
If a reference channel is a measurement channel or MATH channel, the processing of
the computed data differs depending on the selection.
• Reference channel status
The following demonstrates cases in which an abnormal input value or overflow value
occurs on the reference channel.
Reference Channel
Status
Description
Measurement channel Abnormal input value The module of the target channel is
disconnected, or some other abnormality
The target channel becomes Skip
Overflow value
Input value exceeds the measurement range
Computation channel
Abnormal input value When the computed result on a MATH
channel in an expression is an error
Overflow value
When the computed result on a MATH
channel in a TLOG or CLOG expression
exceeds the MATH span setting range
1.15 MATH Function (/M1 Option)