FBM203
FBM203
FBM203
FBM203
_________________________________________ 〖厦门光沃自动化设备有限公司 竭诚为您服务〗 〖联系人:欧先生 〗 〖手机:18030229053(微信同号) 〗 〖QQ: 2479261344 〗 〖传真:0592-5709825 【价格】如此低价,仅此一家 【货期】大量现货,下单后即可发货 【质量】全新原装,进口*** 【保障】产品经过专业检测,质保一年,15天包退换 【品牌】Allen-Bradley罗克韦尔、ABB、本特利Bently 3500系统卡件、GE、艾默生西屋等模块卡件 ______________________________________________
SERCOS协议规定,在正常运行阶段之前,主站需要检测SERCOS环路是否闭合,识别环路上的伺服装置,并且完成网络通讯参数的配置,主要包括系统通讯周期Tscyc,各个伺服电报ATx的发送时刻T1.1、T1.2、…、T1.N,主站数据电报MDT的发送时刻T2,各伺服装置开始采样反馈数据的时刻T4,各个从站控制数据在MDT数据区中的位置和MDT的长度等。可见,SERCOS接口的初始化过程是比较复杂的。为此,1995年RexrothIndramat公司开发出了主动式的SERCOS接口主控卡,称为“SERCANS”。卡上有一个微处理器,由装入的软件执行SERCOS环路的初始化和通信管理,并通过一个双口RAM与外界共享数据,开发人员只需根据中断信号执行读写操作,大大降低了主站接口开发的难度。1999年,随着硬件软件化的发展趋势,RexrothIndramat公司把SERCANS的主控功能向软件抽象层上转移,又成功开发出了SoftSERCANS,它只需要一个被动式的SERCOS接口主控卡。此卡很简单,其上没有微处理器,它比主动式SERCOS接口卡的成本低很多。它提供一个Win32和实时操作系统都能调用的动态链接库DLL。对开发者来说不需要处理硬件地址和时序问题,只需要掌握DLL函数及系统参数的定义,从而将耗费在SERCOS接口实施上的精力和开销降低到了最低水平。用SoftSERCANS写的运动控制应用程序与硬件无关,使系统具有更高的开放性和软件可移植性。
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