NI PXI-2598 PXI转换开关模块
品牌：NI
型号：NI PXI-2598
产品说明：PXI转换开关模块
NI PXI-2598 PXI转换开关模块中文资料：
NI PXI-2598 PXI转换开关模块内存地址和昵称的区别%符号用于区分内存地址和别名。例如，%I17（或%I000017）是内存地址。类似的术语I17（没有%符号）被PLC视为昵称，可用于大多数内存地址。例如，如果您的工厂中有一台名为“17号进料”的电机，工厂中的人通常将其称为“I17”，您可能希望使用I17作为启动该电机的输出线圈（%Q11）的昵称。允许您这样做是因为PLC可以区分昵称I17（您对内存地址%Q11的昵称）和内存地址%I17。NI PXI-2598 用户内存引用类型下表中提到的用户引用在Series 90-30 PLC CPU指令集参考手册GFK-0467.160（安装16点模块的最大物理I/O）中进行了解释；最多320个，安装32点模块。只能用手持式编程器查看（参见GFK-0402《手持式编程仪用户手册》）；可以不在用户的逻辑程序中引用。NI PXI-2598
英文资料
Difference Between a Memory Address and a Nickname The % symbol is used to distinguish memory addresses from nicknames. For example, %I17 (or %I000017) is a memory address. The similar term, I17 (it has no % sign), is viewed by the PLC as a nickname and could be used with most memory addresses. For example, if you had a motor in your plant called “Infeed No. 17,” and it was commonly referred to as ”I17” by the people in your plant, you might wish to use I17 as the nickname for the output coil (%Q11) that turns on that motor. You are allowed to do so because the PLC can distinguish between the nickname, I17 (your nickname for memory address %Q11), and memory address %I17.User Memory Reference Types The user references referred to in the following tables are explained in the Series 90-30 PLC CPU Instruction Set Reference Manual, GFK-0467.160 physical I/O maximum with 16 point modules installed; 320 maximum with 32 point modules installed. May be viewed only with a Hand-Held Programmer (see the Hand-Held Programmer User’s Manual, GFK-0402) ; may not be referenced in a user’s logic program.NI PXI-2598
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