Setup PLC Communication

Use one of the following methods to view or modify the Communication Configuration with the Communication Links dialog box:

·Click the Communications button on the Navigation Bar.

·Select the menu command View > Communications.

·Click on the Communication icon in the Instruction Tree.

On the left side, you can enter a remote PLC address directly into the remote address list box. This sets the target PLC for STEP 7-Micro/WIN 32 when you exit the Communication Links dialog box.

On the right side, you can re-configure communications by double-clicking on the icons of network components. The "Setting the PG/PC Interface" dialog box appears when you double click the interface icon (at the top).

You can also set the target PLC for STEP 7-Micro/WIN 32 operations. First, double-click the refresh icon to initiate a polling loop that finds all PLCs on the network. Second, select the PLC that you want by clicking on a PLC icon. The red outline box shows which PLC is selected for STEP 7-Micro/WIN 32 operations.

Communication Setup Details:

What Are My Communication Choices?
Installing and Removing Communication Interfaces
Selecting and Changing Parameters
Communicating With Modems
Communications Timeout (Serial Port, Windows 95/98)


If you are creating a network of many PLCs, you should initially establish a direct connection to each individual PLC. Use the simple direct connection to assign a unique PLC address to each PLC. If more than one PLC tries to use the same PLC address, the network does not operate correctly.

As a general rule, use the lower available addresses for masters and a higher address for slaves. It is preferable, but not required, to use consecutive addresses for masters on a network. For example, a network with STEP 7-Micro/WIN 32, a TD 200, an OP 15, and some number of S7-200s can use address 0 for STEP 7-Micro/WIN 32, 1 for a TD 200, and 2 for an OP 15. The S7-200s can then be addressed as 3, 4, and 5, or you can leave these numbers free for additional masters and start the numbering of the S7-200s at 6.


STEP 7-Micro/WIN 32 and STEP 7 software use the same user interface to install, configure, or remove modules (Windows Drivers). While the Communications dialog box displays information about the currently installed driver, it is the Setting the PG/PC Interface dialog box that actually loads and configures the Windows drivers. The "Setting the PG/PC Interface" dialog box appears when you double click the interface icon (at the top-right of the Communications Links dialog box). Once the "Setting the PG/PC Interface" dialog box is displayed, you can press F1 or click the dialog box’s Help button to access Help on Setting the PG/PC Interface.