CVC750AE101系统控制模块
说明如何更换需要维修的模块。支持服务提供有关从当地Elsag Bailey销售办事处订购零件的信息。它还解释了Elsag Bailey提供的其他支持领域。附录A显示了NTAI05模拟输入终端单元的双列直插式设置、终端接线和所需布线。附录B显示了双列直插式开关设置、NIAI04模拟输入终端模块的端子接线和所需的布线。附录C显示了NTFB01现场总线终端装置的跳线设置、终端接线和所需布线。如何使用本说明在操作FEC模块之前阅读本说明。如需更多信息，请参阅此列表中的章节。1.将FEC模块投入运行前，请阅读第4节。2.执行第3.3节中的步骤。如果出现问题，请参阅第5节中的操作。4.有关维护FEC模块所需的计划步骤，请参阅第6节。5.关于如何更换模块，请参阅第7节。6.使用第8节了解零件订购信息。本节还介绍了Elsag Bailey提供的其他服务。术语和缩写表表1-1包含Elsag Bailey独有的术语和缩写，或具有不同于标准行业用法的定义。
描述和操作
本节介绍IMFEC1模拟输入模块（FEC）的操作。该模块执行两项主要任务。通过该接口，控制模块（多功能处理器或多功能控制器模块（MFP/MFC））可以从外部设备或智能变送器输入模拟过程数据。它还充当INFI 90 OPEN控制系统和现场设备之间的通信链路。IMFEC12模块接受来自传统变送器（BC、EQ和PT）的输入以及4至20毫安、1至5 VDC、0至1 VDC、0到5 VDC、10至10 VDC和-10至+10 VDC的标准模拟输入。IMFEC11具有IMFEC12模块的所有功能，但也为Bailey Fischer&Porter智能变送器和其他智能设备的接口提供FSK通信。一般操作从控制模块（MFP/MFC）接收初始化后，FEC模块将该信息存储在存储器中，并检查每个输入通道的配置。如果所有输入通道检查正常，则操作开始。如果FEC模块检测到配置错误，则该错误会出现在模块状态报告中。在正常操作下，控制模块发送发射器命令，并从FEC模块请求过程输入数据和状态信息。FEC模块连续读取每个输入通道，进行必要的转换并将数据存储在存储器中。当控制模块请求数据时，FEC模块向其发送存储器中的最新信息。如果其中一个发射器发生通信故障，FEC模块将在继续正常操作的同时恢复通信。它在恢复变送器通信后检查变送器配置，并继续正常过程控制。
Explains how to replace a module needing repair.
Support Services Provides information about ordering parts from your local Elsag Bailey sales office. It also explains other areas of support that Elsag Bailey provides. Appendix A Shows the dipshunt settings, terminal wiring for the NTAI05 analog input termination unit and the required cabling. Appendix B Shows the dipswitch settings, terminal wiring for the NIAI04 analog input termination module and the required cabling. Appendix C Shows the jumper settings, terminal wiring for the NTFB01 field bus termination unit and the required cabling. HOW TO USE THIS INSTRUCTION Read this instruction before placing the FEC module in operation. Refer to the sections in this list as needed for more information. 1. Read Section 4 before placing the FEC module in operation. 2. Do the steps in Section 3. 3. Refer to Section 5 for what to do if a problem occurs. 4. Refer to Section 6 for the scheduled steps needed to maintain the FEC module. 5. Refer to Section 7 for how to replace a module. 6. Use Section 8 for parts ordering information. This section also tells of additional services that Elsag Bailey offers. GLOSSARY OF TERMS AND ABBREVIATIONS Table 1-1 contains those terms and abbreviations that are unique to Elsag Bailey or have a definition that is different from standard industry usage.
DESCRIPTION AND OPERATION
This section explains the operation of the IMFEC1 Analog Input Module (FEC). The module does two major tasks. It provides an interface by which the controlling module (multifunction processor or multifunction controller module (MFP/MFC)) can input analog process data from external devices or smart transmitters. It also serves as a communication link between the INFI 90 OPEN control system and field devices. The IMFEC12 module accepts inputs from conventional transmitters (BC, EQ and PT) and standard analog inputs of 4 to 20 milliamps, 1 to 5 VDC, 0 to 1 VDC, 0 to 5 VDC, 0 to 10 VDC and -10 to +10 VDC. The IMFEC11 has all the functionality of the IMFEC12 module but also provides FSK communications for interface to Bailey-Fischer & Porter smart transmitters and other smart devices. GENERAL OPERATION Upon receiving initialization from the controlling module (MFP/MFC), the FEC module stores that information in memory and checks the configuration of each input channel. If all input channels check good, operation begins. If the FEC module detects a configuration error, that error appears in the module status report. Under normal operation, the controlling module sends transmitter commands and requests process input data and status information from the FEC module. The FEC module continuously reads each input channel, does the necessary conversions and stores the data in memory. When the controlling module makes a request for data, the FEC module sends it the most current information that it has in memory. If a communication failure with one of the transmitters occurs, the FEC module works to restore communication while continuing normal operation. It checks the transmitter configuration upon restoring transmitter communication and normal process control continues.
