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有关EMC和安全的更多信息，请参阅附录D，指令注意事项。LED指示灯参见第179页表20。性能数据执行应用程序时，PM851/PM856/PM860的性能不同。在PM851/PM856和PM860中使用相同的应用程序，执行时间的差异可以表示为：PM851/PM556中的执行时间=2*PM860中的执行速度示例：如果某个应用程序在PM860中执行时间为100毫秒，关键功能•MPC860微处理器以48 MHz运行。•对于PM851A，12 MB RAM，带内部或外部电池备用设施。•对于PM856A，16 MB RAM，带内部或外部电池备用设施。•对于PM860A，16 MB RAM，带内部或外部电池备份设施。•12 x S800 I/O单元可以连接到电气模块总线。•四个板载通信端口：–CN1+CN2，以太网端口（IEEE 802.3，10BaseT）–COM3，带调制解调器支持的串行端口（RS-232C）–COM4，用于维修工具的串行端口Compact Flash接口，支持加载应用程序和冷保留数据存储。除了RAM和PM851A中不支持CN2之外，PM851A的数据与PM856A的数据相同。除了应用程序执行的性能外，PM856A的数据与PM860A的数据相同，请参阅第244页的性能数据。
For more information regarding EMC and safety, see Appendix D, Directive Considerations. LED Indicators See Table 20 on page 179. Performance Data The PM851/PM856/PM860 differ in performance when executing an application program. Using the same application program in PM851/PM856 and PM860, the difference in execution time can be expressed as: Execution time in PM851/PM856 = 2 *Execution time in PM860 Example: If a certain application program has an execution time of 100 ms in PM860,Key Features • MPC860 Microprocessor running at 48 MHz. • For PM851A, 12 MB RAM with internal or external battery back-up facility. • For PM856A, 16 MB RAM with internal or external battery back-up facility. • For PM860A, 16 MB RAM with internal or external battery back-up facility. • 12 x S800 I/O units can be connected to the electrical ModuleBus. • Four on-board communication ports: – CN1 + CN2, Ethernet ports (IEEE 802.3, 10BaseT) – COM3, serial port (RS-232C) with modem support – COM4, serial port (RS-232C) for service tool • Basic communication is extendable by using additional communication interface units. • Compact Flash interface which supports loading of application and cold retain data storage. The data for PM851A is the same as for PM856A, except for the RAM and that there is no support for CN2 in PM851A. The data for PM856A is the same as for PM860A except for performance of application program execution, see Performance Data on page 244.
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