ET200SP 分佈式IO

ET200SP 分佈式IO 介紹影片:
特色:

1.) 採用絕對即時工業層乙太網路 Profinet 網路介面,內建2組 Profinet 乙太網路接口.
2.) 最大IO Max 點數, 1024 point.
3.) 每片模組支援熱插拔.
4.) 高速週期掃描更新時間.
5) 體積極小化,配線採用快速插線方式,免使用工具,例如螺絲起子.
6) 支援高解析類比AI 與AO模組,以及最小DI 點數4點.
7) 完整的硬體辨識區別方式,採用制定顏色標籤分辨模組種類,以及配線端子規格.
8) 具備完整的認證規格如CE,UL等等.
9.) 未來支援 safety 可執行 大量安全點數需求,成本的 safety 邏輯控制,及變頻器控制,馬達啟動衝啟動器機種.
9) 低價價格,德國製造.
10.)台灣2012發行販售.

Safety 的終極變形金剛-PROFIsafe

....Safety 的終極變形金剛... SIEMENS PROFIsafe..待續..

Ethernet ISO/OSI reference model

Ethernet ISO/OSI reference model:

The “Open Systems Interconnection” (OSI) layer model is a reference model for data transmission in networks named after a working group of the International Standardization Organization ISO.

The model consists of seven layers:
Two hardware-oriented layers (layers 1 and 2), two transmission-oriented layers (layers 3 and 4) and three application-oriented layers (layers 5, 6, and 7).

As a reference model, OSI is not a recognized standard. Many products in telecommunications and in networking use the ISO/OSI model as a foundation.

The 7 layers are as follows:

Physical layer (layer 1):
The physical layer defines the bit transmission of data via the network at the cable and connector level.

Data-link layer (layer 2):
The data-link layer groups data into frames and adds information required for passing on the frames. Layer 2 is responsible for transporting data frames from node to node and for error correction.

Network layer (layer 3):
The network layer controls the routing of the frames in conjunction with layer 2. It handles the addressing of the frames and how they are routed in the network. An example of this layer is the Internet protocol.

Transport layer (layer 4):
Coordinates the transmission of data packets.
It checks whether all packets have been received completely. A typical example of layer 4
is the Transmission Control Protocol (TCP).

Session layer (layer 5): The session layer establishes a connection between the processes running on different hosts. It is responsible for opening a “Session” and for a continuous dialog of requests and responses between the individual applications.

Presentation layer (layer 6):
The presentation layer is responsible for converting data into the format required for the specific application.
This layer also compresses texts and converts various codes used by the partners.

Application layer (layer 7):
The application layer is responsible for applications directly available to the user, such as file transfer or mail programs.
The user recognizes data transmission in the form of requests or responses.