DCS控制卡件GFD233A 3BHE022294R0101儀器資訊

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吞吐量示例在八通道模塊上，2個通道低于范圍。分配的所有寄存器至模塊的數(shù)據(jù)將每1150毫秒更新一次，直到輸入超出范圍

通道返回有效范圍。當他們這樣做時，更新間隔將返回到710毫秒。

更新間隔=（400或710）+（超出范圍通道X 220）

使用上面的示例：（710）+（2 X 220）=1150毫秒

如果一個通道返回到有效范圍，更新間隔將減少到930毫秒。

注：只要通道超出范圍，分配給它的寄存器將數(shù)據(jù)為0000（4095升高），低于范圍，或4096（8192升高），高于范圍范圍（參考第107頁的數(shù)據(jù)值參考表）

*更新間隔是更新所有分配給模塊的寄存器。注：任何模塊運行時診斷故障都將導致0000值為返回到控制器，而不管選擇的范圍如何用戶連接到標準螺釘端子排和硬接線系統(tǒng)允許在不干擾接線的情況下插入或移除模塊。下表顯示了每個輸入范圍可接受的五個輸入范圍組模塊將接受高于其指定值2%的輸入FSR范圍，但不會進入超范圍條件，但不會低于范圍。為了確定輸入的負載和保護注意事項勵磁電路，下圖是輸入電路前部的示意圖

終止注意連接到電流輸入端子的內置250Ω電阻器。什么時候電流檢測端子外部跨接至正極輸入端子，無論電壓范圍如何，該輸入都可能有電流輸入挑選出來的。

注：電流檢測功能是專門為4-20 mA提供的電流回路應用（1-5 V輸入范圍）。然而，電流模式是可操作的在所有范圍內。

B875–102高速模擬輸入，輸入電路前端。

Throughput Rate Example

On an eight channel module, 2 channels are under range. All the registers assigned

to the module will be updated every 1150 ms, until the inputs on the out of range

channels return to the valid range. When they do, the update interval will return to

710 ms.

Update Interval =

(400 or 710) + (Out of Range Channels X 220)

Using the example above:

(710) + (2 X 220) = 1150 ms

If one channel returned to the valid range, the update interval would reduce to

930 ms.

NOTE: As long as the channel is out of range, the register assigned to it will either

have data of 0000 (4095 Elevated), under range, or 4096 (8192 Elevated), over

range. (Refer to Data Value Reference Chart, page 107)

* The Update Interval is the amount of time necessary to update the data for all the

registers assigned to the module.

NOTE: Any module run-time diagnostic failure will result in a 0000 value being

returned to the controller, regardless of selected range.s

User connections are made to a standard screw terminal strip, and the rigid wiring

system permits module insertion or removal without disturbing the wiring. The following table shows the five input ranges acceptable to each input range

group. The module will accept an input as much as 2% FSR above its specified

range without going into an over-range condition, but nothing below range.For purposes of determining load and protection considerations for the inputting of

field circuits, The following figure is a schematic diagram of the input circuit’s front

end. Note the built-in 250 Ω resistor connected to the current input terminal. When

the current sense terminal is externally jumpered to the positive input terminal,

current input becomes possible for that input regardless of the voltage range

selected.

NOTE: The current sense function has been provided specifically for the 4—20 mA

current loop applications (1—5 V input range). However, current mode is operable

on all ranges.

B875–102 High Speed Analog Input, Input Circuit Front End.