ABB IMDSM05数字I/O模块
品牌：ABB
型号：ABB IMDSM05
产品说明：数字I/O模块
ABB IMDSM05数字I/O模块中文资料：
ABB IMDSM05数字I/O模块然而，距离并不总是问题所在；如果系统没有正确接地，即使安装在彼此附近的机架也会遇到问题。接地信息见第2章。使用远程机架需要特别考虑扫描时间。为了长距离运行，I/O总线在与远程机架通信时以较低的时钟速度运行（与扩展机架相比），这将对性能产生影响。对离散I/O的影响相对较小，对其他模块（如高速计数器或Genius通信模块）的影响稍大。与远程基板中的模块通信所需的时间的增加通常相对于总扫描时间而言很小。有关扫描时间计算的更多详细信息，请参阅GFK-0467系列90-30/20/Micro PLC CPU指令集参考手册第2章。ABB IMDSM05另一个重要的扫描时间考虑因素是用于远距离通信的电缆类型。数据传播延迟必须最小化，以确保适当的系统定时和裕度。电缆类型的任何偏差都可能导致系统运行不稳定或不正确。建议的电缆类型在IC693CBL300/等中的“电缆”章节中规定。数据表。ABB IMDSM05
英文资料
However, distance is not always the problem; even racks that are mounted near each other can experience problems if the system is not grounded properly. See Chapter 2 for grounding information. The use of Remote racks requires a special consideration pertaining to scan time. In order to operate at long distances, the I/O Bus runs at a lower clock speed (compared to that used for Expansion racks) when communicating with Remote racks, which will have an impact on performance. The impact will be relatively small for discrete I/O and slightly more for other modules, such as the High Speed Counter or Genius Communications Module. The increase in time needed to communicate with modules in a remote baseplate will usually be small with respect to the overall scan time. For more detailed information on scan time calculations, refer to Chapter 2 of GFK-0467, the Series 90-30/20/Micro PLC CPU Instruction Set Reference Manual. Another important scan time consideration is the cable type used for communicating at longer distances. Data propagation delay must be minimized to ensure proper system timing and margins. Any deviation in cable type may result in erratic or improper system operation. Suggested cable types are specified in the “Cables” chapter in the IC693CBL300/etc. data sheet.ABB IMDSM05
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