NI PXI-2503多路复用器开关模块
品牌：NI
型号：NI PXI-2503多路复用器开关模块
产品说明：模块控制器
NI PXI-2503多路复用器开关模块中文资料：
NI PXI-2501多路复用器开关模块断点SNP协议断点SNP成为Series 90-30 CPU上所有串行端口的默认协议，从CPU 350–364的固件版本9.00开始，CPU 311–341的固件版本8.20开始。免中断功能使该协议与更广泛的调制解调器兼容。此功能与现有SNP主单元兼容，例如运行PLC编程软件或PCM模块的计算机。在一些应用中，主要是使用多点SNP通信和非常短的PLC扫描时间的组合，出于性能原因，用户可能希望禁用无中断SNP。NI PXI-2501可通过通信请求指令禁用和重新启用断点SNP。90系列PLC串行通信用户手册GFK-0582记录了这些通信请求说明。350–374 CPU 350–374组CPU是为了满足客户的需求而开发的，这些客户需要增加内存大小、更快的处理速度以及311–341 CPU上没有的其他功能。与手持式编程器（HHP）和存储卡的兼容性ŶCPU 350-374中的用户程序不能使用Series 90-30手持式编程仪（IC693PRG300）查看或编辑。您必须使用GE Fanuc编程软件包之一创建或编辑CPU 350-374用户程序。NI PXI-2501
英文资料
Breakfree SNP Protocol Breakfree SNP became the default protocol on all serial ports on the Series 90-30 CPUs, starting with Firmware Release 9.00 for CPUs 350–364, and Firmware Release 8.20 for CPUs 311–341. The breakfree feature makes the protocol compatible with a wider variety of modems. This feature is compatible with existing SNP master units such as computers running PLC programming software, or PCM modules. In a few applications, primarily where a combination of multi-drop SNP communications and very short PLC sweep times are used, users may desire, for performance reasons, to disable breakfree SNP. Breakfree SNP can be disabled and re-enabled via Communications Request instructions. The Series 90 PLC Serial Communications User’s Manual, GFK-0582 documents these Communications Request instructions.350–374 CPUs The 350–374 group of CPUs was developed to meet the needs of customers requiring increased memory size, faster processing speed, and additional features not available on the 311–341 CPUs. Compatibility With Hand-Held Programmer (HHP) and Memory Card Ŷ The user program in CPUs 350—374 cannot be viewed or edited with the Series 90-30 HandHeld Programmer (IC693PRG300). You must use one of the GE Fanuc programming software packages to create or edit CPU 350—-374 user programs.
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