Yokogawa Standalone MW100 - Manual (Page 81)

1-67
IM MW100-01E
Explanation of Functions
1
2
3
4
5
App
Index
Group Reset
Clears all MATH channel data (including MATH alarms) per the Event/Action function or
requests from communication commands. If this request occurs during a computation, it
is executed on the next computation interval and computation starts. Also, if the request
occurs while computation is stopped, it is cleared when computation starts.
Math Groups
Specifies multiple channels from among Math channels 1 through 60. Up to seven
groups can be set. Math groups are used with group reset.
Math Interval
Select one from among the measurement group numbers, and specify a MATH interval.
For the MATH interval, select a group having a measurement interval of 100 ms or
higher. Computation is performed every MATH interval using the values of the reference
channels.
Rolling Average
Determines the rolling average of the computed results on the measurement channel and
uses it as the computed result of that channel. The number of samples and the sampling
interval can be specified for each computation channel.
The setting ranges are as follows:
Sampling interval: 1 s to 1 hour (23 levels)
Number of samples: 1 to 1500
• Example
If the MATH interval is 2 s, the sampling interval is 10 s, and the number of samples is
3, the computed data on which rolling average is calculated is as follows:
Time (s)
MATH interval
Moving average source
Sampling interval
Set the sampling interval to an integer multiple of the MATH interval. If the sampling
interval is shorter than the MATH interval, the sampling interval is matched to the MATH
interval.
For details on setting the sampling interval, see “MATH Function Specifications (/M1
Option)” in section 5.2.
Math Span
The upper and lower limits for the display of the monitor screen and other items. The
MATH span setting range is as shown below depending on the decimal place. If the
computed results fall outside of the MATH span setting range, they are displayed on
screen as plus over or minus over data.
Decimal Place MATH span setting range
0 –9999999 to 99999999
1 –999999.9 to 9999999.9
2 –99999.99 to 999999.99
3 –9999.999 to 99999.999
4 –999.9999 to 9999.9999
1.15 MATH Function (/M1 Option)