IS200ITBAG1A模拟量输入模块
14第1章Tricon v9–v10系统脉冲输入模块简介规划和安装指南每个脉冲输入模块包括三个独立测量输入频率的通道。为精确测量旋转机械的速度而优化的特殊算法用于补偿定时齿轮上不规则间隔的齿或周期性加速/减速。结果被放入值表中。使用相应的I/O总线将每个输入表传递给其相关的MP。每个MP中的输入表通过TriBus传输到其邻居。每个MP选择中间值，并相应地校正每个MP中的输入表。在TMR模式下，应用程序使用中间值；在双工模式下，使用平均值。提供特殊的自检电路来诊断所有输入点的健康状态，即使没有激活信号。每个脉冲输入模块保证在控制器的使用寿命内保持校准；不需要定期手动校准。有关规格，请参阅第124页的脉冲输入模块和第129页的脉冲累加器输入模块。热电偶输入模块每个热电偶输入模块有三个独立的输入通道。每个输入通道从每个点接收可变电压信号，执行热电偶线性化和冷端补偿，并将结果转换为摄氏度或华氏度。然后，每个信道根据需要向三个主处理器发送表示每个计数0.125度的16位有符号整数。为了确保每次扫描的数据正确，使用中值选择算法选择值。位于现场终端模块上的三联温度传感器支持冷功能补偿。热电偶模块的每个通道使用内部精确电压参考每五秒执行一次自动校准和参考结补偿。在隔离热电偶模块上，冷端指示器显示冷端传感器故障。在非隔离热电偶模块上，故障指示器显示传感器故障。以防止一个通道上的单个故障影响另一个通道的方式执行每个热电偶输入的传感。每个模块对每个通道执行完整的持续诊断。有关规格，请参阅第133页热电偶输入模块。现场终端Tricon机箱的现场接线有多种终端选项，包括外部终端面板（ETP）和扇形电缆。ETP是一种电无源印刷电路板，现场布线很容易连接到该板上。ETP将输入信号从现场传递到输入模块，或将输出模块产生的信号直接传递到现场布线，从而允许在不干扰现场布线的情况下移除或更换输入或输出模块。当使用数字输入或数字输出模块时，扇出电缆是ETP的低成本替代品。扇出式电缆的一端连接到Tricon背板，另一个Tricon v9–v10系统的操作理论15规划和安装指南端提供了50根扇出式引线，每个引线分别标有与连接器信号匹配的引脚号。有关更多信息，请参阅Tricon v9–v10系统现场终端指南。通信模块Tricon控制器可以与其他Triconex控制器和外部设备通信。通信模块支持串行和网络通信以及各种通信协议。主处理器通过通信总线向通信模块广播数据。数据通常在每次扫描时刷新；它从未超过两次扫描时间。有关通信设置和协议的更多信息，请参阅Tricon v9–v10系统的通信指南。高级通信模块（ACM）ACM（高级通信模块）充当Tricon控制器和Foxboro智能自动化（I/a）系列DCS之间的接口，在Foxboro系统中作为I/a系列节点总线上的安全节点。ACM以全网络数据速率传输过程信息，以便在I/A系列DCS上的任何地方使用，以Foxboro操作员熟悉的显示格式将所有Tricon控制器别名数据（包括系统变量和系统别名）和诊断信息传输至操作员工作站。有关规格，请参阅第148页的高级通信模块（ACM）。增强型智能通信模块（EICM）增强型智能通讯模块（EICM）使Tricon控制器能够与Modbus设备（主设备或从设备）、TriStation PC和打印机进行通信。
14 Chapter 1 Introduction Planning and Installation Guide for Tricon v9–v10 Systems Pulse Input Modules Each Pulse Input Module includes three channels which measure the input frequency independently. Special algorithms, optimized for accurately measuring the speed of rotating machinery, are used to compensate for irregularly spaced teeth on timing gear or for periodic acceleration/de-acceleration. The results are placed into a table of values. Each input table is passed to its associated MP using the corresponding I⁄O bus. The input table in each MP is transferred to its neighbors across the TriBus. The middle value is selected by each MP and the input table in each MP is corrected accordingly. In TMR mode, the mid-value is used by the application; in duplex mode, the average is used. Special self-test circuitry is provided to diagnose the health state of all input points, even when an active signal is not present. Each Pulse Input Module is guaranteed to remain in calibration for the life of the controller; periodic manual calibration is not required. For specifications, see Pulse Input Modules on page 124 and Pulse Totalizer Input Module on page 129. Thermocouple Input Modules Each Thermocouple Input Module has three independent input channels. Each input channel receives variable voltage signals from each point, performs thermocouple linearization and cold-junction compensation, and converts the result to degrees Celsius or Fahrenheit. Each channel then transmits 16-bit signed integers representing 0.125 degrees per count to the three Main Processors on demand. To ensure correct data for every scan, a value is selected using a mid-value selection algorithm. Triplicated temperature transducers residing on the field termination module support coldjunction compensation. Each channel of a thermocouple module performs auto-calibration and reference-junction compensation every five seconds using internal-precision voltage references. On the Isolated Thermocouple Module, a cold-junction indicator announces the failure of a cold-junction transducer. On the Non-Isolated Thermocouple Module, a Fault indicator announces a transducer fault. Sensing of each thermocouple input is performed in a manner which prevents a single failure on one channel from affecting another channel. Each module performs complete ongoing diagnostics on each channel. For specifications, see Thermocouple Input Modules on page 133. Field Terminations Various termination options are available for field wiring of the Tricon chassis, including external termination panels (ETPs) and fanned-out cables. An ETP is an electrically-passive printed circuit board to which field wiring is easily attached. An ETP passes input signals from the field to an input module or passes signals generated by an output module directly to field wiring, thereby permitting removal or replacement of the input or output module without disturbing field wiring. A fanned-out cable is a lower-cost alternative to an ETP when using digital input or digital output modules. One end of a fanned-out cable connects to the Tricon backplane and the other Theory of Operation 15 Planning and Installation Guide for Tricon v9–v10 Systems end provides 50 fanned-out leads, each individually labeled with a pin number that matches the connector signals. For more information, see the Field Terminations Guide for Tricon v9–v10 Systems. Communication Modules A Tricon controller can communicate with other Triconex controllers and external devices. Communication modules enable serial and network communication and a variety of communication protocols. The Main Processors broadcast data to the communication modules across the communication bus. Data is typically refreshed every scan; it is never more than two scan-times old. For more information about communication setup and protocols, see the Communication Guide for Tricon v9–v10 Systems. Advanced Communication Module (ACM) The ACM (Advanced Communication Module) acts as an interface between a Tricon controller and a Foxboro Intelligent Automation (I/A) Series DCS, appearing to the Foxboro system as a safety node on the I/A Series Nodebus. The ACM communicates process information at full network data rates for use anywhere on the I/A Series DCS, transmitting all Tricon controller aliased data (including system variables and system aliases) and diagnostic information to operator workstations in display formats that are familiar to Foxboro operators. For specifications, see Advanced Communication Module (ACM) on page 148. Enhanced Intelligent Communication Module (EICM) The Enhanced Intelligent Communication Module (EICM) enables a Tricon controller to communicate with Modbus devices (masters or slaves), with a TriStation PC, and with a printer.
