YOKOGAWA SMARTDAC+ GM, Техническая информация

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TI04L55B01-01EN
3.3.11 WT Communication Function (/E2 option)
The WT communication function is used by the GM to acquire values measured and computed
on WT power meters and analyzers made by Yokogawa Meters & Instruments Corporation. The
values are acquired in digital form over Ethernet.
The acquired data can be assigned to communication channels (/MC option) and displayed and
recorded simultaneously with the measured temperature or other data of the GM.
Previously, the GM measured the D/A conversion output of power meters (measured values
converted into analog signals). This was compromising the high-precision data that the power
meters were measuring.
The WT communication function maintains high precision by acquiring the digital values.
GM
Ethernet
• • • • •
Server 1 Server n
Communication channel
WT300 WT500
WT1800
ESC
RESET
SET
CAL
PAGE PAGE
ELEMENT 1 2
3
ELEMENT
ALL
RANGE
VOLTAGE CURRENT
AUTO AUTO
DISPLAY
NUMERIC WAVE OTHERS
FORM ITEM
CURSOR
INTEGRATOR
SETUP
INPUT INFO
START/
STOP
RESET
HOLD
SINGLE
SHIFT MISC
NULL LOCAL
KEY LOCK FILE IMAGE
MENU STORE
STORE SET
POWER
Server 2
Measurement value,
Computation value
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Connectable Models and Options
Maker Models Option Description
Yokogawa Meter &
Instrument
WT300/WT330 /G5 Harmonics Measurement
WT500 /G5 Harmonics Measurement
/DT Delta computation
WT1800 /G5 Harmonic Measurement
/G6 Simultaneous Dual Harmonic Measurement
/DT Delta Computation
/MTR Motor Evaluation Function
/AUX Auxiliary Sensor Inputs
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General Specifications
Item Specifications
Maximum number of simultaneous connections 16
Data acquisition interval 500 ms/1s/2s/5s/10s/20s/30s
Number of acquisition data assignments 300 (assigned to communication channels)
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Other Functions
Exponential scaling
Exponential scaling can be applied to data acquired from a WT.
For example, if the measured value of the WT is 123.45 kW, the data can be scaled by 10
-3
to
derive data in unit of kW.
Watchdog timer
The watchdog timer can be used to detect communication interruptions caused by
communication errors.
For details on the watchdog timer function, see section 3.3.6, “Communication Channel Function
(/MC option).”
Status output
Notification can be sent through relay output when there is a WT communication error.
For details on status output, see ssection “3.2.10 Fail, Status Output” on page 3-30.
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Functions