4-3
IM WT5000-01EN
Range Σ link (Range Σ Link)
You can select whether to collectively or independently set the measurement ranges of input elements assigned
to the same wiring unit in the wiring system settings.
Turning Range Σ Link On and Off
For example, assume that the wiring system on a model with three input elements is set as follows:
Input elements 1 to 3: Three-phase, four-wire system (3P4W). Input elements 1 to 3 are assigned to a single
wiring unit ΣA.
• OFF
The measurement range can be set independently for each input element included in a wiring unit.
• ON
The measurement range of input elements 1 to 3 are set to the same setting. This is convenient because
when you are measuring a three-phase device, you can set the measurement range settings of all input
elements included in a wiring unit simultaneously.
Settings That Are Shared between Input Elements When Range Σ Link Is Set to On
• Measurement range (including auto range on or off)
• Direct current input or external current sensor input
• Valid measurement range
How Settings Are Aligned When Range Σ Link Is Changed from Off to On
When range Σ link is changed from off to on, the measurement range, direct current input or external current
sensor input, and valid measurement range settings of each input element in a wiring unit (ΣA, ΣB, or ΣC) are
changed as follows:
• The measurement range is set to the greatest of the measurement ranges of the input elements assigned to
the same wiring unit. The external current sensor input range has precedence over the direct input current
range. The external current sensor input range has precedence over the direct input current range.
• The auto range on/off settings are changed to match the setting of the input element whose measurement
range is highest. If multiple input elements are set to a common highest measurement range, the setting of
the input element with the smallest input element number takes precedence.
• In the valid measurement range settings, all measurement ranges are enabled (selected).
4 Input Settings (Advanced/Options)
