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MSR128LUS/MSR128LUV USERS MANUAL EM-7375 Rev.2
You may want to set a different value for the engineering range to convert the engineering unit (e.g. from mA to A).
Example:
Address 1 (Current)
Modbus data (input range) = 2e9
Engineering range = 0 to 2e9 ––> Recorded data = 2e9 mA
Engineering range = 2 to 2e6 ––> Recorded data = 2e6 A
Plot Range
These values are usually the same as Engineering Range values. Set a narrower range in this field when you want
to enlarge a particular section of the full-scale of the Engineering Range.
For example, if you have a voltage input:
This is the most common setting. Eng. Range and Plot Posi-
tion values are the same. Scales are -10V at the left edge,
10V at the right edge of the chart.
This is used when you want to enlarge a particular section of
the Eng. Range. The chart is used only for a narrower range of
5V, between 0V at the left edge and 5V at the right edge, against
the full-scale range of 20V.
Alarm Setpoint
Specify Lower and Upper setpoints in engineering unit within the Engineering Range. The alarm trips when the
signal goes above the upper setpoint and below the lower setpoint. The alarm function is not available in High
Speed mode. If an alarm setpoint is changed during operation, the alarm functions in the new setting the moment
the new setting is applied.
Alarm Deadband
Alarms are reset when the signal goes out of the alarm zone by the deadband values specified for each alarm
setpoint.
Alarm Output
Mark ‘X’ to when you want to output the alarm trip at the 53U’s Do terminal. Specify also the node number of the
device and the channel number ‘1.’
Caution !
The 53U module’s local alarm setting has a priority over that on the MSR128LU. Setpoints, deadbands and alarm
output setting will be ignored if they are specified at the 53U module.
In order to output alarms from the MSR128LU at the 53U’s Do terminal, the discrete I/O setting for the 53U must be
set to ‘Undefined.’ Please refer to the 53U operation manual for more information.
Output contact logic (N.O. or N.C.) depends upon the 53U setting.
Normal & Alarm Colors
Colors specified for normal and alarm conditions are used for the alarm indicators in the digital display area on the
Record view.
Use the color palette.
Note: Alarm setting for Power Factor
When a limit value is set for the power factor signal, it is automatically mirrored for both LEAD and LAG spheres. For
example, setting lower limit value 0.8 means that the same value is applied to both LEAD and LAG spheres.
You cannot set different limit values for LEAD and LAG spheres. Choose between -1.0 and 1.0. A value out of this
range will be rounded either to -1.0 or 1.0.
Decimal Point
Specify the decimal point position of the data displayed on the digital indicator. This setting is also valid to stored
data. However, if more decimal places are set to greater values than those the original Modbus data have, these
missing decimal places will be simply filled with zeros. Please confirm the effective number of digits and decimal
point position in the unit when you choose this value.
UNIT
LOWER LIMIT
UPPER LIMIT
Scaled Range
V
-10
10
Plotted Range
V
-10
10
UNIT
LOWER LIMIT
UPPER LIMIT
Scaled Range
V
-10
10
Plotted Range
V
0
5
