HIEE200130R1控制卡件
; 新的冗余IP连接将使用新激活的PLC。PAC系统™ RX3i和RSTi EP TCP/IP以太网通信用户手册第1节GFK-2224Y 2019年8月简介17编程器仍然可以使用每个以太网接口的直接IP地址与冗余系统中的每个PLC直接通信（例如，存储新逻辑或配置）。1.4.3.1 HSB冗余系统中的角色切换在HSB冗余中，当发生以下情况之一时，冗余CPU会自动启动角色切换：▪ 活动单元检测到致命故障▪ 活动装置处于停止模式▪ 活动单元已断电▪ HSB角色切换由手动或应用程序逻辑启动。要在使用RMX模块的冗余系统中手动执行角色切换，请切换RMX模块前面板上的角色切换按钮。CPE400/CPL410允许操作员使用RDN命令功能通过OLED显示菜单手动执行角色切换。有关HSB系统中角色切换的更多信息，请参阅PACSystems热备用CPU冗余用户指南GFK-2308。1.4.3.2非HSB冗余系统中的角色切换当为非HSB CPU系统中的以太网模块启用冗余IP时，应用逻辑负责设置以太网模块的冗余模式。设置应用冗余模式服务请求（SVC_REQ 55）指令用于通知以太网模块主机CPU的当前冗余角色。此SVC_REQ应用于向控制器中为冗余IP操作配置的所有以太网接口提供冗余角色切换通知。在命令以太网接口的角色切换后，应用程序逻辑可以监视模块的LAN接口状态（LIS）块，以确定何时激活了冗余IP地址。有关LIS的详细信息，请参阅第12.6节“监控以太网接口状态位”。注意：在命令另一个冗余角色切换之前，应用程序必须为冗余IP激活留出足够的时间（至少120毫秒）。当以太网接口识别出已为其配置了冗余IP地址时，模块会向CPU发送邮件消息，以注册冗余角色切换通知。在非HSB系统中，以太网接口最初处于备份模式。通电后，应用逻辑必须使用SVC_REQ将冗余状态设置为所需值。一旦运行，CPU就会记住发送到该以太网接口的最后一个命令冗余角色。当以太网接口重新启动时，CPU自动命令以太网接口进入其最后的冗余状态，而无需应用程序逻辑的显式操作。1.4.3.3进入停止模式当非HSB CPU进入停止模式时，为冗余IP配置的以太网接口将自动设置为备份模式。当CPU随后返回到运行模式时，以太网接口保持在备份模式，直到应用程序逻辑将冗余模式设置为活动模式。PAC系统™ RX3i和RSTi EP TCP/IP以太网通信用户手册第1节GFK-2224Y 2019年8月简介18 1.4.3.4停止/IO扫描启用模式在此模式下，
; the new Redundant IP connections will use the newly active PLC. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 1 GFK-2224Y August 2019 Introduction 17 The programmer can still communicate directly with each PLC in the redundant system (for example, to store new logic or configuration) using the direct IP address of each Ethernet interface. 1.4.3.1 Role Switching in HSB Redundancy Systems In HSB redundancy systems, a role switch is initiated automatically by the redundant CPU when one of the following occurs: ▪ An active unit detects a fatal fault ▪ An active unit is placed in Stop mode ▪ An active unit is powered off ▪ An HSB role switch is initiated manually or by the application logic To perform a role switch manually in redundant systems which employ RMX modules, toggle the Role Switch button located on the front panel of the RMX module. CPE400/CPL410 permits the operator to manually perform a role switch via the OLED display menu, using the RDN Command feature. For additional information about role switches in HSB systems, refer to the PACSystems Hot Standby CPU Redundancy User’s Guide, GFK-2308. 1.4.3.2 Role Switching in Non-HSB Redundancy Systems When redundant IP is enabled for an Ethernet module in a non-HSB CPU system, it is the responsibility of application logic to set the redundancy mode of the Ethernet module. The Set Application Redundancy Mode Service Request (SVC_REQ 55) instruction is used to inform the Ethernet module of the current redundancy role of the host CPU. This SVC_REQ should be used to provide redundancy role switch notification to all Ethernet interfaces in the controller that are configured for redundant IP operation. After commanding a role switch for an Ethernet interface, the application logic can monitor the module’s LAN interface Status (LIS) block to determine when it has activated the Redundancy IP address. For details about the LIS, refer to Section 12.6, Monitoring the Ethernet Interface Status Bits. Note: The application must allow sufficient time for Redundant IP activation (at least 120 ms) before commanding another redundancy role switch. When an Ethernet interface recognizes that a redundant IP address has been configured for it, the module sends a mail message to the CPU to register for redundancy role switch notification. In non-HSB systems, the Ethernet interface is initially put into backup mode. After power-up, the application logic must use a SVC_REQ to set the redundancy state to the desired value. Once running, the CPU remembers the last commanded redundancy role sent to that Ethernet interface. When an Ethernet interface is restarted, the CPU automatically commands the Ethernet interface to its last redundancy state without explicit action by the application logic. 1.4.3.3 Going to Stop Mode When a non-HSB CPU goes to Stop mode, Ethernet interfaces that are configured for redundant IP are automatically set to backup mode. When the CPU is subsequently returned to Run mode, the Ethernet interfaces remain in backup mode until the application logic sets the redundancy mode to active. PACSystems™ RX3i and RSTi-EP TCP/IP Ethernet Communications User Manual Section 1 GFK-2224Y August 2019 Introduction 18 1.4.3.4 Stop/IO Scan Enabled Mode In this mode,
