IC641SWP745控制器模块现货供应1个起批，量大从优

IC641SWP745控制器模块现货供应1个起批，量大从优;
IC641SWP745控制器模块现货供应1个起批，量大从优;
IC641SWP745控制器模块现货供应1个起批，量大从优


三、 Modbus转Profibus-DP网关PM-160的配置
PM-160是通用型Modbus/RS485/RS422/RS232到Profibus-DP的协议转换网关，在网关RAM中建立了Modbus/RS485/RS422/RS232到Profibus-DP的映射数据区，由软件实现Modbus/RS485/RS422/RS232到Profibus-DP的协议转换和数据交换。凡具有RS485/422/232接口的设备（Modbus协议或者非标协议）都可以通过PM-160与现场总线Profibus-DP互联。其中，PM-160在与Profibus-DP通讯是作为Profibus-DP从站，PM-160在与串口设备通信时，可以作Modbus主站、Modbus从站，也支持与非标串口设备实现数据透明传输。通过在西门子STEP7中注册网关PM-160的GSD文件，即可在该编程软件中对该网关进行相关硬件和软件配置，完成相应的通讯功能。请见如下详细的硬件和软件配置方法：
1、Modbus转Profibus-DP网关PM-160的硬件配置
PM-160的Profibus-DP从站地址可以通过网关的硬件旋码开关或者配置按钮来设置。旋码开关有两位，左侧位设置地址高位（十位），右侧位设置地址低位（个位）。通过拨码开关可设置网关PM-160处于正常运行状态或者配置状态。当PM-160处于配置状态时，用户可通过配套配置软件设置相关读写命令和参数。
PM-160自带标准Profibus-DP接口，用户可使用标准Profibus-DP连接头和标准的Profibus-DP电缆将其连接至Profibus-DP现场总线中。
PM-160提供RS485/422/232三种串口，Modbus从站、主站设备以及用户非标串口设备可以通过这三种接口实现与网关PM-160的连接通讯。PM-160没有内置终端电阻，在进行RS485通信时，请注意在RS485总线终端各添加一个终端电阻（120欧姆）。
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