0BChapter 3
Functions
3-18
Functions
unctions
3.5 3-STATE
function
3.5 3-STATE
function
PMU1A
PMU1A
(Electric
power)
(Electric
power)
PMU2A
PMU2A
(Power
two-system)
(Power
two-system)
EMU8A
EMU8A
(Pulse/temperature)
(Pulse/temperature)
CTD8E
CTD8E
(CT
expansion)
(CT
expansion)
c
U
×
: With settings of two-system
c
: With setting
U
: When
connected to PMU
□
A
×
: Without setting
• Classifies integrated power amount and integrated time into the three types.
• One of the present measurement values (power, voltage, current, and event input) outputs its
condition signal according to the specified threshold.
* Output requires the output terminal to be set to HIGH, MIDDLE, or LOW.
• When measurement and saving operations are done, a value more than or equal to HIGH
threshold is specified to be "HIGH integrated power amount," less than LOW threshold, "LOW
integrated power amount," and others, "MIDDLE condition integrated power amount."
• When using the 3-STATE function, set the measurement start time/measurement end time.
(Refer to Page 3-17.)
3-STATE target
• Targets for judgment of 3-STATE output function can be selected from one of the following.
• Judgment method for each target
1) Electric power (active) (unit of 1 W)
Using active power as a target for judgment, integrate power amount according to the
HIGH/LOW threshold.
2) Current, voltage (unit of 0.1 A, 0.1 V)
Using the directly measured current/voltage line (*1) as a target for judgment, integrate
power amount according to the HIGH/LOW threshold.
*1. The targets for judgment are shown below.
Phase wire
Target for current
judgment
Target for voltage
judgment
Single-phase 2-wire
V ln
I
Single-phase 3-wire
V r n
、
V t n I r
、
I t
3-phase 3-wire
V r s
、
V s t I r
、
I t
3-phase 4-wire
V r n
、
V s n
、
V t n
I r
、
I s
、
I t
The HIGH condition judgment implements the OR operation (either value
exceeds the threshold), while the LOW condition judgment implements the AND
operation (both values are lower than the threshold).
3) Event input
If event inputs are used as the discrimination of 3-STATE , one of the following
combinations is used: event input 1 and event input 2, event input 3 and event input 4,
and event input 5 and event input 6. For the judgment criteria, refer to the table below.
Event input 1
Event input 2
Judgment
0 0
LOW
0 1
LOW
1 0
MIDDLE
1 1
HIGH
0: Without input, 1: With input
* If event inputs are used as the discrimination of 3-STATE, EMU8A (pulse/temperature) must
be connected to PMU1A (electric power) or PMU2A (power two-system). In this case, set the
slave ID of EMU8A (pulse/temperature) to 5. If electric power, current, and voltage are used
for judgment, only PMU1A (electric power) and PMU2A (power two-system) are available.
* Hysteresis can be set for HIGH threshold and LOW threshold. Set within the range of 0 to
24000000.
* When defining HIGH = equipment operation condition, MIDDLE = equipment wait condition,
and LOW equipment stop condition, 3-STATE has operation examples as shown below.
* For single-phase 2 wire, PMU1A (electric power) and PMU2A (power two-system) can
output only the CT1 condition, and the CT1 and CT3 conditions, respectively.
イベント入力
1
イ
IDDLE
LOW
MIDDLE
HIGH
MIDDLE
HIGH
LOW
ベント入力
2
形
KM1
動作判定
M
Event input 1
Event input 2
Operation judgment of Model KM1
