60
7.7
Interlocking Control
Interlocking control is a control type that an ON/OFF contact output or an analog output value varies according to a
measurement value measured by the extension unit.
The maximum output number of contact output/analog output varies depending on the number of control units in the system.
Output
Number of outputs
Maximum number of outputs
Contact output
The number of control units in the system × 3
96
Analog output
The number of control units in the system
32
The control unit collects a measurement value from the extension unit every minute, and the conditional expression set in
advance determines the state of contact output/analog output.
After that, in the next period (1 minute), the output state is controlled.
*The measurement value of the extension unit represents a measurement value for a few seconds from every minute
(**:**:00).
<Contact output control>
The contact output control function executes a comparison between a measurement value and the constant, between
measurement values, or between contact states, and in accordance with the comparison result, controls the ON/OFF
contact output. The control execution timing is 1 minute.
In addition, by executing the two type comparisons, the logical sum (OR) or logical multiply (AND) of each comparison
result provides the ON/OFF contact output control.
The measurement values to be used for comparison are selected from the measurement items in Energy Measuring Unit
Extension model for same voltage system (Model: EMU4-A2), Energy Measuring Unit Extension model for different voltage
system (Model: EMU4-VA2), or Energy Measuring Unit Extension model for analog input (Model: EMU4-AX4) that is
connected to the control unit.
*The measurement items measuring integrated values are not selectable.
00 min
Collect a measurement
value and the
conditional expression
determines the output.
Output control
(ON)
59 min
01 min
Threshold
Measurement value
Action of control unit
Collected
Collected
Collected
Control
Control
Collect a measurement
value and the
conditional expression
determines the output.
Output control
(OFF)
Collect a measurement
value and the
conditional expression
determines the output.
Output control
(ON)
[Conditional expression]
Measurement value > Threshold:
Contact output is ON.
[Conditional expression A]
Measurement value < Threshold: ON
Determination
result A
OFF
OFF
ON
ON
[Conditional expression B]
Measured value > Threshold: ON
Determination
result B
OFF
ON
ON
OFF
Action of control unit
Contact output
Logical multiply
(AND)
OFF
OFF
ON
Contact output
Logical sum (OR)
OFF
ON
ON
Collect a measurement
value and the
conditional expression
determines the output.
Collect a measurement
value and the
conditional expression
determines the output.
Measurement
value
Threshold
00 min
59 min
01 min
Threshold
Measurement
value
