描述
系统软件结构如图5所示。图中,系统编辑模块为用户提供编辑环境,接收用户的梯形图程序输入,并将其存储为相应的文件。梯形图语言为一种图形语言,要直接对其进行编译十分困难,因此并不是直接对梯形图程序进行编译,而是先将其翻译成指令语言的文本形式,再对指令语言进行编译。图形语言编译问题的解决,提高了代码的利用率[6-7]。通过提取数据结构中的数据,形成C语言程序文件,经过C51编译器、连接器、转换器的编译、连接、转换过程,生成能够在PLC硬件上运行的可执行文件。
Qty 2 NetApp DS14MK2-AT DSX-7.0TB-R5-C 500GB SATA 14TB
NetApp SK-F825 Spares Kit for F825 Filer
NetApp FAS3020 Filer DS14MK2 14 x 300GB X276A-R5 4.2TB
NetApp FAS270c Network Appliance Filer w/ 2TB 14 x X274
NetApp FAS3050C Network Appliance Filer Head
NetApp FAS3020c 2x Filers / 2x DS14 MK2 / 28x 146GB
NetApp DS14 MK2 Shelf w/ (14) 144GB 10K HDD
Netapp FAS2050C Cluster Filer Head Dual Controller
Netapp FAS2050C Cluster 2x Controller FAS2050 Clustered
NetApp SK-FAS960 Spares Kit for FAS960 System
NetApp X749A DC Power Supply Network Appliance
NetApp X3772B F820/F810/C3100 Motherboard
NetApp SK-F840B Spares Kit for F840 Filer
NETAPP FAS3050c Cluster 2 Filer Heads FAS 3050 Disk