產(chǎn)品內(nèi)容介紹
HAFAABAAABE1BCA1XE控制面板
模擬輸出模塊在出廠前進行校準。為了確保模塊的精度，您應該定期校準每個輸出的微調(diào)罐。
對于25-45°C之間的操作，建議每隔12個月進行一次校準，以及0-60°C之間的6個月間隔。
所需工具校準模擬輸出模塊需要以下工具：
1） 編程面板
2） 精密電壓表，精度為+/-0.0001伏，10伏刻度
3） 一把1/4英寸十字螺絲刀
4） 一把1/8英寸標準螺絲刀
標定程序下表顯示校準B872-200模塊的步驟：
步驟操作
1拆除模擬輸出前面板上的兩個螺釘和標簽單元這樣您就可以接觸到裝飾罐。每個輸出有一個微調(diào)罐。這個第一個微調(diào)罐用于第一個輸出，第二組用于第二個輸出，依此類推。微調(diào)罐調(diào)整范圍的總幅度（滿標度）。請參閱下圖。注0.1%公差是通過校準可達到的最大FSR精度
適用于任何電壓范圍。將任何范圍校準為0.1%公差會稍微影響其他范圍關i、 e.該通道剩余可用范圍的公差不能為假設優(yōu)于+/-0.25%FSR。
2打開模擬輸出模塊手柄，露出連接器和端子。
3將電壓表負極引線（-）連接到通道1（模擬公共線CH1）和將導線（+）連接至通道1（模擬輸出CH1）端子。參見電壓表下面的連接圖。
注：校準期間，現(xiàn)場接線可能保持連接。
4已選擇所需電壓范圍。手動編程數(shù)據(jù)值4095輸入通道2的輸出寄存器。將通道輸出電壓與下表中給出的預期電壓表讀數(shù)。
5調(diào)整相應通道的（滿標度校準）微調(diào)罐，以達到所需電壓表讀數(shù)。
6對其余通道重復步驟3至5。
7校準程序完成后，斷開電壓表，返回所有連接到其原始狀態(tài)，關閉模塊手柄，并更換前標簽蓋在裝飾罐上的。程序結(jié)束B873-002和B875-002是可與984一起使用的模擬輸入模塊可編程控制器。這兩個模塊之間的唯一區(qū)別是B873-002有四個輸入通道，B875-002有八個輸入通道。
可以將模塊設置為在標準范圍（0000至4096）或升高范圍（4095至8192）。它接受1.0至5.0伏的輸入或4至20毫安。（參考B873-002和B875-002現(xiàn)場連接，第164頁）。
輸入轉(zhuǎn)換為數(shù)值，范圍從0001到4095（標準）。
或4096至8191（高架）。值0000、4095、4096或8192表示無效數(shù)據(jù)和可能的問題。（參考第162頁的數(shù)據(jù)值參考圖表）。這個值與輸入信號成正比。例如，輸入電壓為3.0V導致模塊發(fā)送值2048（標準）?；蛘咻斎肟梢允?2mA，將產(chǎn)生值6144（高架）。（參考數(shù)據(jù)輸入價值轉(zhuǎn)換，第161頁）。
The Analog Output Module
is calibrated at the factory prior to shipment. To ensure the module's accuracy, you should calibrate the trim-pots for each output regularly. Calibration is recommended at 12 month intervals for operation between 25-45 °C, and at 6 month intervals between 0-60 °C. Required Tools The following tools are needed to calibrate an Analog Output Module: 1) A programming panel 2) A precision voltmeter, with an accuracy of +/-0.0001 volts on a 10 volt scale 3) A 1/4 inch Phillips screwdriver 4) A 1/8 inch standard screwdriver Calibration Procedure The following table shows the steps to calibrate the B872-200 Module: Step Action 1 Remove the two screws and the label located on the front panel of the Analog Output module. This allows you access to the trim-pots. There is one trim-pot per output. The first trim-pot is for output number one, the second set is for output two, etc. The trimpots adjusts the range's total magnitude (full scale). Refer to the figure below. Note The 0.1% tolerance is the maximum FSR accuracy achievable thru calibration for any volt range. Calibrating any range to the 0.1% tolerance throws the other slightly off; i.e., tolerances for the remaining ranges available to that channel cannot be assumed better than +/- 0.25% FSR. 2 Open the Analog Output module handle to expose the connectors and terminals. 3 Connect the voltmeter minus lead (-) to the channel 1 (Analog Common CH1) and the plus lead (+) to the channel 1 (Analog Output CH1) terminal. Refer to the Voltmeter Connections Diagram below. Note Field wiring may remain connected during calibration. 4 With the desired voltage range already selected. Manually program a data value of 4095 into the output register for channel two. Compare channel output voltage with anticipated voltmeter reading given in the table below. 5 Adjust the (full scale calibrate) trim-pot for corresponding channel to get desired voltmeter reading. 6 Repeat steps 3 through 5 for remaining channels. 7 After the calibration procedure is complete, disconnect the voltmeter, return all connections to their original state, close the module handle, and replace the front label that covers the trim-pots. END OF PROCEDURE
The B873-002 and B875-002
are analog input modules that can be used with 984 Programmable Controllers. The only difference between the two modules is that the B873-002 has four input channels and the B875-002 has eight input channels. The module can be set to produce a data value in the Standard Range (0000 to 4096) or the Elevated Range (4095 to 8192). It accepts inputs of 1.0 to 5.0 volts or 4 to 20 milliamperes. (Refer to B873-002 & B875-002 Field Connections, p. 164). The input is converted to a numerical value, ranging from 0001 to 4095 (Standard). or 4096 to 8191 (Elevated). Values of 0000, 4095, 4096, or 8192 indicate invalid data and a possible problem. (Refer to the Data Value Reference Chart, p. 162). The value is directly proportional to the input signal. For example, an input voltage of 3.0V causes the module to send a value of 2048 (Standard). Or the input could be 12mA, which would produce a value of 6144 (Elevated). (Refer to Input to Data Value Conversion, p. 161).
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