MTL 8715-CA-BI总线接口模块底座
热交换CI854A支持热交换。它可以在线更换，不会对连接到CEX总线的其他单元造成任何干扰。在热移除和随后的插入之后，该单元将自动配置。在冗余配置中，可以在不干扰主单元的情况下更换备用单元。这包括如果设备出现故障，可以在线更换。为了支持热交换，不需要配置。运行中的热配置（HCIR）在运行中进行热配置时，可以在线配置从属设备，而无需初始化PROFIBUS通信。当循环通信保持活动时，新的或更改的配置被下载到从设备。如果从属设备支持HCIR，则可以在线添加或删除I/O单元。在重新配置期间，CI854/CI854A和从机之间的循环数据传输停止。CI854/CI854A保持输入值，从机保持输出值。在完成重新配置之后，循环数据传输将基于新的配置数据进行。
The reconfiguration is monitored by the CI854/CI854A with the HCIR timeout. By
starting the reconfiguration the HCIR timeout is sent via a SetPrm telegram to the
slave. This indicates the slave to increase the watchdog timeout to the value defined
by the HCIR timeout until the reconfiguration is finished. The timeout for HCIR is
defined on CI854/CI854A by:A configuration via HCIR is only possible for slaves that have implemented this
feature like S800 I/O and S900 I/O. To activate the HCIR sequence a special entry
in the hardware definition file is necessary. For slaves imported via the Device
Import Wizard this parameter is automatically set if the setting is available in the
GSD file.Hardware Library
To configure hardware types for PROFIBUS master and slave units hardware
libraries are used. How to handle hardware libraries, refer System 800xA Control AC
800M Configuration
