RELIANCE 57401模块
校准过程中，验证模式可用，以查看整个校准范围内的模拟输入（以伏特为单位）。这个
输入为1-5 Vdc的出厂校准，不需要现场校准。然而，现场校准可以是如果需要另一个范围或匹配精确的变送器校准，则执行。当前输入为：使用连接在输入端子（250Ω 提供电阻器控制器用于转换4-20mA输入）。
通电-在热启动、热启动或冷启动期间，功能块将暂时旁路数字滤波器，以使输出在实际硬件输入信号处初始化。3.2.10 AINU_-模拟输入，通用AINU_功能块在可选I/O上可用扩展器板。这些功能块转换传感器输入
例如T/C（热电偶）、RTD（电阻温度探测器）、毫伏、欧姆和滑入块的电源输出。电流输入（即4-20 mA）通过以下方式调节：使用WMV类型并连接3.75Ω 跨接电阻器输入。输出偏置可用于消除任何已知的传感器电路和数字滤波器中的偏移（时间常数）
以抑制工艺噪声。输出QS指示输出信号O1的质量状态将变高
当输出质量差时。质量差表示A/D转换故障或T/C开路或输出过程变量的范围。
缩放函数用于建立输出范围，在所选传感器范围的工程单位（例如0-10 mv或50.0-150.0安培）。直接温度测量（即T/C和RTD）旁通传感器和量程缩放以及从表3.4中选择块输出单位。当选择，正确的只读ASCII字符
与所选类型相对应的单位将自动为：置于发动机单位参数中。当选择欧姆或MVs时，发动机单位参数可以为
被配置为对应于过程工程单元。默认的SEN、MIN和MIN刻度设置为最小操作值和SEN最大和最大刻度设置为最大操作值。森敏&SEN MAX始终以摄氏度表示传感器范围限制。但是，输入实际值很重要
MINSCALE、MAXSCALE和DPP参数中的预期工作范围，以便其他功能块，如作为控制器，操作员面板和工作站界面可以指向该块进行范围和显示信息块名称（ID）。第8.4节列出了输入端子（端子号）。
3.2.10 AINU_ - Analog Inputs, Universal AINU_ function blocks are available on the optional I/O Expander Board. These function blocks convert sensor inputs such as T/C (thermocouple), RTD (resistance temperature detector), millivolt, ohm, and slidewire sources into block outputs. Current inputs (i.e. 4-20 mA) are accommodated by using the WMV type and connecting a 3.75Ω resistor across the input. An output bias can be used to nullify any known offset in the sensor circuit and a digital filter (time constant) is included, to dampen process noise. Output QS indicates the quality status of the output signal O1 and will go high (1) when the output is of bad quality. Bad quality indicates an A/D conversion failure or an open circuit T/C, or an out of range process variable. The scaling function is used to establish an output range, in engineering units, for the selected sensor range (e.g. 0-10 mv or 50.0-150.0 amperes). Direct Temperature Measurements (i.e. T/C and RTD) bypass sensor and range scaling and the block output units are selected from Table 3.4. When selected, the proper read only ASCII characters corresponding to the type units selected will automatically be placed in the ENG UNITS parameter. When OHMs or MVs are selected, the ENG UNITS parameter can be configured to correspond to the process engineering units. The default SEN MIN and MIN SCALE are set to the minimum operating value and the SEN MAX & MAX SCALE are set to the maximum operating value. SEN MIN & SEN MAX always indicate the sensor range limits in degrees C. However, it is important to enter the actual intended operating range in the MINSCALE, MAXSCALE, and DPP parameters so that other function blocks, such as the controller, operator faceplate, and workstation interface, can point to this block for range and display informationBlock names (IDs). Input terminations (terminal numbers) are listed in Section 8.4.
