在PLCDEV看到的一篇文章，介绍了如何使用STEP7 Manager连接S7-300/400PLC和上传、下载程序。
我简单翻译了一下，中文版见PDF文档： STEP7连接与上传下载程序.rar (319 K) 下载次数:1116

英文原版见word文档：   Step 7 Connecting, Downloading and Uploading.doc (279 K) 下载次数:191

贴上部分原文，看看是否是您需要的：
Step 7 Connecting, Downloading and Uploading

These are general guidelines for connecting, downloading and uploading from an S7-300 or S7-400 PLC. The following procedures were created using Siemens SIMATIC STEP 7 version 5.4 software.
To start, open the SIMATIC Manager.
  

Connecting to the S7 PLC
The Programming Cables
There are three major types of programming cables:
1. The CP5512 card in a PCMCIA slot.
  

2. The PC Adapter using a serial or USB connection
  

3. An Ethernet cable
  

The CP5512 card and the PC Adapter can communicate on either an MPI or PROFIBUS port. Note that PROFIBUS is labeled as DP on the Siemens connection ports. These cables can piggyback on existing connectors. Be aware that the PC Adapter draws its power to work from the connection port so check the power LED for proper operation. The CP5512 card draws its power from the computer.
For Ethernet (TCP/IP) use a standard Ethernet cable from the computer to a CPU with an Ethernet port, a CP 343/443 module or a network switch all ready attached to the PLC network.
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