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FOXBORO 0303440C+0303443B氣動控制器
由熱電偶在然后根據(jù)熱電偶類型。為了獲得絕對值溫度，參考結(jié)的溫度為補充。輸出+32767的溢出數(shù)。如果輸入電壓下溢測量范圍，下溢數(shù)值輸出–32767的。在這兩種情況下，錯誤消息都是通過CS31系統(tǒng)總線發(fā)送。溫度低于0°C被評估為“欠流”。如果出現(xiàn)斷線（開路），編號為-32767是輸出。此外，通過CS31系統(tǒng)總線。所有未使用的通道必須短路。注：由于L型熱電偶（鐵/康銅，F(xiàn)e–CuNi根據(jù)DIN 43710）類似于J型熱電偶，也可用于溫度范圍為0…900°C。稍大的熱Emf然而，由L型熱電偶產(chǎn)生，假裝溫度有點高。下表說明了這一事實（所有溫度數(shù)據(jù)均指參考溫度0°C）：溫度-如果使用L型熱電偶，則通過測量模塊評估溫度保證點代替J型熱電偶配置“未使用通道”如果通道成對未使用，則忽略它們很有用測量值的獲取以及在軟件中進行處理。其他渠道包括處理速度更快。圖5.2.5-3顯示了如何設(shè)置配置“無通道評估”。測量值與16位字中位的排列根據(jù)模擬表示a和b模擬通道的測量范圍為成對配置（即總是同時用于2個通道），見圖5.2.5–3。如果發(fā)生溢流或下溢，或如果檢測到斷路，則數(shù)字+32767或–32767為輸出。
以下三幅圖說明了評估模塊的功能
尋址必須在每個模塊上設(shè)置地址，以便中央單元可以正確訪問輸入和輸出。關(guān)于項目的詳細描述“尋址”包含在章節(jié)中中央單元和耦合器的“尋址”。對于設(shè)置模擬格式（表示a和b），請參見圖5.2.5-3。設(shè)置地址的開關(guān)在蓋子下面模塊外殼右側(cè)（見圖5.2.5–3）。如果中央單元07 KR 31、07 KT 31、07 KR 91、07 KT92和07 KT 93用作總線主控，如下地址分配有效：正常操作模塊在通電后初始化初始化所有指示燈都亮起。如果CS31系統(tǒng)總線不運行，LED 3閃爍。如果發(fā)生錯誤，錯誤指示燈也會亮起初始化期間。診斷和顯示模塊ICDT 08 B5提供以下診斷功能：開路（斷線）檢測，如果Pt100/Pt1000溫度傳感器或使用熱電偶存儲并保存此信息詢問（錯誤類型和錯誤位置）模塊內(nèi)部錯誤檢測檢測傳輸錯誤檢其中一個錯誤，紅色錯誤LED亮起向上的然后將錯誤消息發(fā)送中央單元或連接到連接器。
The thermoelectric voltage generated by the
thermocouples is converted into binary values inside the
module and then linearized according to the
thermocouple type. In order to get the absolute
temperature, the temperature of the reference junction is
added.overflow number of +32767 is output. If the input voltage
underflows the measuring range, the underflow number
of –32767 is output. In both cases, an error message is
sent via the CS31 system bus. Temperatures lower than
0°C are evaluated as ”Underflow”.
If a broken wire (open circuit) occurs, the number –32767
is output. In addition, an error message is sent via the
CS31 system bus.
All unused channels must be short–circuited.
Note:
Since L type thermocouples (Iron/constantan, Fe–CuNi
according to DIN 43710) are similar to J type
thermocouples, they also can be used in the temperature
range of 0...900 °C. The slightly greater thermal Emf
generated by the L type thermocouple, however,
pretends a little higher temperature. The following table
illustrates this fact (all temperature data is referred to a
reference temperature of 0 °C):
Temperature Temperature evaluated by the moduat the mea- le, if an L type thermocouple is used
suring point instead of a J type thermocouple Configuration ”Unused channel”
If channels are unused in pairs, it is useful to omit them
from the acquisition of the measured value and
processing in the software. The other channels are
processed faster then. Figure 5.2.5–3 shows how to set
the configuration ”No evaluation of channels”.
Relationship between the measuring values and the
arrangement of the bits in the 16–bit word
according to the analog representations a and b
The measuring ranges for the analog channels are
configured in pairs (i.e. always for 2 channels together),
see Fig. 5.2.5–3. If an overflow or an underflow occurs, or
if an open circuit is detected, the numbers +32767 or
–32767 are output.
The following three figures illustrate the evaluation
functions of the module.Addressing
An address has to be set on each module, so that the
central unit can access the inputs and outputs correctly.
A detailed description concerning the item
”Addressing” is contained in the chapters
”Addressing” of the central units and couplers. For
setting the analog format (representation a and b) see
Fig. 5.2.5–3.
The switches for setting the address are under the cover
on the right side of the module housing (see Fig. 5.2.5–3).
If the central units 07 KR 31, 07 KT 31, 07 KR 91, 07 KT
92 and 07 KT 93 are used as bus masters, the following
address allocations are valid:
Normal operation
The module initializes itself after power ON. During
initialization all LEDs are ON.
If the CS31 system bus does not run, the LED 3
flashes. The error LED also light up, if an error occurs
during initialization.
Diagnosis and displays
The module ICDT 08 B5 offers the following diagnosis
functions:
Detection of open circuit (broken wire), if
Pt100/Pt1000 temperature sensors or
thermocouples are used
Storing and holding ready this information for
interrogation (error type and error location)
Detection of an error inside the module
Detection of a transmission error
If one of these errors is detected, the red error LED lights
up. The error message is then sent to the central unitor to the coupler.
