IS200SSCAH1A工控模块系统备件
因此，所有安全相关数据和逻辑都受到保护。尽管安全系统是独立的，DCS操作员仍必须了解警报和故障信息，以便能够方便地进行纠正性维护。下图显示了典型的GMR安装，PLC和分布式控制系统之间有RTU Modbus链路。LANS Genius总线GMR控制器DCS或过程控制器DCS使用RTU/Modbus协议与GMR系统通信46624 6-2 Genius®模块冗余灵活三模块冗余（TMR）GFT-177A系统技术产品概述–1998年2月6 GMR系统的通信模块系列90-70 PLC的各种通信选项可用于将GMR PLC链接到其他设备，如主机、个人计算机或其他设备。通信协处理器模块（CMM）：通信协处理器提供通信控制（CCM）、RTU Modbus（RTU）和90系列（SNP）通信协议。CCM偌阋下钴CCM数为：读/写暂存器、输忑输躞；输入和输出的位置位/清零；读取擦写板；快速读取的Q序列命令；并修改诊断状态字。在主和对等CCM配置中，CMM模块通过应用程序启动与其他设备的通信。RTU作为操作员接口和DCS的行业标准通信，RTU Modbus链路提供了对GMR PLC内所有数据和注册数据的访问。在RTU从属协议中，提供以下功能：读取输入和输出表；读取模拟输入；读寄存器表；读取擦写板；读取异常状态；强制单个或多个输出；预设单个或多个寄存器；报告设备类型并执行环回维护。SNP CMM上的每个串行端口都可以配置为提供SNP主或从功能。CMM模块上的SNP协议提供对寄存器、输入、输出、模拟输入、模拟输出、%T、%M、%P、%L和%G变量类型的读写访问。还支持完整的Series 90数据报功能和许多状态和控制功能。提供“自动拨号”功能来控制调制解调器。SNP–SNP协议的X扩展提供对上述相同变量类型的高性能读写访问。SNP-X特别适用于多点配置中的高速数据采集和控制。在主SNP配置中，CMM模块通过应用程序通信请求启动与其他设备的通信。CMM提供RS-232和RS-485接口，并通过背板与CPU通信。在GMR系统中，通常在最多三个CPU中的每个CPU中使用一个CMM，但是每个CPU可以支持安装在CPU机架或扩展机架中的多个CMM。可编程协处理器模块（PCM）：该模块用作CPU的协处理器。它可以编程为执行操作员界面、实时计算、数据存储和数据采集或数据通信功能的自定义协议。PCM模块提供的CCM2功能包括：寄存器、输入和输出表的读/写；输入和输出的位置位/清零；读取擦写板；快速读取的Q序列命令；并修改诊断状态字。在主和对等CCM组态中，PCM模块通过应用程序请求启动与其他设备的通信。该模块有两个RS-232和RS-422/485兼容的串行端口。同时运行的两个端口都可以支持高达19.2 Kbaud的全双工通信。PCM具有高达95 KB的用户存储器。此外，PCM可容纳512 KB大小的可选扩展内存子板。这两种类型的存储器都有一个可更换的锂电池支持。工厂LAN以太网控制器模块：以太网控制器模块提供Series 90-70 PLC和IEEE 803.2 CSMA/CD LAN之间的直接连接。以太网控制器支持三种可选通信协议：TCP/IP以太网允许通过4层TCP/IP（Internet）协议栈使用GE Fanuc的SRTP与主机和/或LM90–70编程和配置软件进行通信。为了获得最高的系统吞吐量，GE Fanuc还为GMR系统提供以太网接口。高度流行的TCP/IP协议可用于促进GE Fanuc TCP/IP驱动程序在第三方DCS中的集成。除了数据监控外，以太网接口还使用Logicmaster 90软件提供远程编程服务。冗余通信可以通过在每个PLC中使用两个以太网卡来实现。MMS-ETHERNET允许在7层OSI协议栈上使用MMS（制造消息规范–ISO 9506）与主机和/或LM90-70编程和配置软件进行通信。SRTP仅允许与LM90-70编程和
All safety related data and logic are thereby protected. Despite the independence of the safety system, the DCS operator must still be aware of alarm and fault information so that corrective maintenance can be applied expediently. The following diagram represents a typical GMR installation with an RTU Modbus link between the PLCs and the Distributed Control System. LANS Genius Busses GMR Controllers DCS or Process Controller DCS Communications to a GMR System using RTU/Modbus Protocol 46624 6-2 Genius® Modular Redundancy Flexible Triple Modular Redundant (TMR) GFT-177A System Technical Product Overview – February 1998 6 Communications Modules for a GMR System A variety of communications options for the Series 90-70 PLC can be used to link GMR PLCs to other devices such as host computers, personal computers, or other devices. Communications Coprocessor Module (CMM): The Communications Coprocessor Module provides Communications Control (CCM), RTU Modbus (RTU) and Series Ninety (SNP) communications protocols. CCM Functions in CCM mode are: read/write of register, input and output tables; bit set/clear of inputs and outputs; read scratch pad; Q sequence commands for fast reads; and modify diagnostic status word. In the master and peer CCM configurations the CMM module initiates communications with other devices through the application program. RTU As the industry standard communications for operator interface and DCS, the RTU Modbus link provides access to all and register data within the GMR PLCs. In the RTU Slave protocol, the following functions are provided: read input and output tables; read analog input; read register table; read scratch pad; read exception status; force a single or multiple outputs; preset a single or multiple registers; report device type and perform loopback maintenance. SNP Each serial port on the CMM can be configured to provide SNP master or slave capability. The SNP protocol on the CMM module provides read and write access to registers, inputs, outputs, analog inputs, analog outputs, %T, %M, %P, %L and %G variable types. Full Series Ninety datagram capability and many status and control functions are also supported. An “autodial” feature is provided to control a Modem. SNP–X extensions to the SNP protocol provide high performance read and write access to the same variable types listed above. SNP-X is especially useful for highspeed data acquisition and control in multidrop configurations. In the master SNP configurations the CMM module initiates communications with other devices through application program communications requests. The CMM provides both the RS-232 and RS-485 Interfaces and communicates with the CPU over the backplane. It is typical in a GMR system to use one CMM in each of up to three CPUs, however each CPU can support multiple CMMs mounted in either the CPU rack or an expansion rack. Programmable Coprocessor Module (PCM): This module functions as a coprocessor to the CPU. It can be programmed to perform operator interface, real-time computations, data storage and custom protocols for data acquisition or data communications functions. CCM2 functions provided by the PCM module are: read/write of register, input and output tables; bit set/clear of inputs and outputs; read scratch pad; Q sequence commands for fast reads; and modify diagnostic status word. In the master and peer CCM configurations, the PCM module initiates communications with other devices through application program requests. This module has two serial ports which are both RS-232 and RS-422/485 compatible. Both ports operating simultaneously can each support up to 19.2 Kbaud full-duplex communications. The PCM has up to 95 Kbytes of user memory. In addition, a PCM can accommodate an optional expansion memory daughterboard up to 512 Kbytes in size. Both types of memory are backed by a replaceable lithium battery. Factory LAN Ethernet Controller Module: The Ethernet Controller module provides direct connection between the Series 90-70 PLC and IEEE 803.2 CSMA/CD LANs. The Ethernet Controller supports three alternative communication protocols: TCP/IP-ETHERNET Allows communications with hosts and/or LM90–70 programming and configuration software using GE Fanuc’s SRTP over a 4-layer TCP/IP (Internet) protocol stack. For the highest system throughput, GE Fanuc also offers the Ethernet Interface for the GMR system. The highly popular TCP/IP protocol is available to facilitate the integration of the GE Fanuc TCP/IP driver within a thirdparty DCS. In addition to data monitoring the Ethernet Interface also provides remote programming services using the Logicmaster 90 software. Redundant communications can be implemented by utilizing two Ethernet cards in each PLC. MMS-ETHERNET Allows communications with hosts and/or LM90-70 programming and configuration software using MMS (Manufacturing Message Specification – ISO 9506) on a 7-layer OSI protocol stack. SRTP Allows communications only with LM90-70 programming and configuration software using SRTP over a 4–layer OSI protocol stack. Genius Bus Controller (GBC): The highly–robust Genius communications system is supported by most operator interface manufacturers such as Intellution, Factorylink, and others. The Genius LAN provides a medium–speed option to access the database of the GMR PLCs over a single twisted– pair media. In particular, the Global Data service is highly efficient for applications requiring performance approaching that of Ethernet. Redundant communications can be
