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IM MW100-01E
Alarm Level
You can implement alarm actions based on the computed result. Four levels can be set
per channel. The alarm types are upper limit, lower limit, delay high limit, and delay low
limit. There is no hysteresis function. There is no hysteresis function.
Math Error Data Processing
Processing of measurement channels referenced in expressions and data referenced in
math channels is as follows. Note that error data, plus over data, and minus over data
can be processed using special MATH items.
Processing upon Math Error
When the computation results in an error, the following choices are available.
Choice for the Computed Result Notation
Set to plus over +Over
Set to minus over –Over
Special Math Processing
If the reference channel is an input channel or MATH channel, special math processing is
performed depending on the value of the reference channel.
• Reference channel status
When the reference is a measurement channel
Status Description
Abnormal input value Abnormal status such as the module of the target channel
coming loose
The target channel is set to Skip
Overflow value The input value exceeds the measurement range.
• Special math processing on input channels other than TLOG and CLOG
computation
Input channel status Notation Processing
Abnormal input value Error MATH result error
Skip Continue the computation using the previous value for
channels with an abnormal input value
Overflow value Error Compute using the overflow value
Skip Continue the computation using the previous value for
channels with an overflow value
Limit*1 Continue the computation by replacing the overflow value
with upper or lower limit value
*1 The upper or lower limit value that is replaced for the input channel varies depending on the
MATH type.
Input channel: Upper/lower limit of the measurement range
Scaled input channel: Upper/lower limit of scaling
1.13 MATH Function (/M1 Option)
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