1756-EN4TR modules support Parallel Redundancy Protocol (PRP) with firmware revision 4.001. 4
Updated the 1756-EN2F EtherNet/IP communication rate specification. 6
When the 1756-RIO module is used as a rem
Available Communication Modules
Communication Connections
A ControlLogix® system uses connections to establish communication links between devices. The types of connections include the following:
• Controller-to-local I/O modules or local communication modules
• Controller-to-remote I/O or remote communication modules
• Controller-to-remote I/O (rack-optimized) modules
• Produced and consumed tags
• Messages
• Controller access with the Studio 5000® environment
• Controller access with RSLinx® software for HMI or other applications
You indirectly determine the number of connections the controller uses by configuring the controller to communicate with other devices in
the system. The limit of connections ultimately resides in the communication module you use for the connection. If a message path routes1756-EN4TR模块支持固件版本为4.001的并行冗余协议（PRP）。4.
更新了1756-EN2F以太网/IP通信速率规范。6.
1756-RIO模块用作rem时
可用的通信模块
通信连接
ControlLogix®系统使用连接在设备之间建立通信链路。连接的类型包括：
•控制器至本地I/O模块或本地通信模块
•控制器至远程I/O或远程通信模块
•控制器至远程I/O（机架优化）模块
•生产和消费的标签
•信息
•通过Studio 5000®环境访问控制器
•通过RSLinx®软件访问控制器，用于HMI或其他应用
通过将控制器配置为与中的其他设备通信，可以间接确定控制器使用的连接数
系统。连接的限制终取决于用于连接的通信模块。如果消息路径路由