Special pre-configuration for S7-1200 and S7-1500 PLCs

The SIDirect Legacy object requires some pre-configuration through the Siemens TIA portal to allow access to data inside the S7-1500 PLC. This pre-configuration consists of:

• Enabling PUT/GET communication

• Disabling optimized block access

  Note: Pre-configuration is not required for the SIDirect Symbolic object.

Enable PUT/GET communication

1. In the navigation pane of the TIA software, locate the S7-1500 CPU.

2. Right-click the S7-1500 CPU and then click Properties. The properties dialog box appears.

   

3. In the left pane, click Protection.

4. Select the required access level for the PLC.

   Note: If you select No Access, you will not be able to use the SIDirect Legacy object to access tags in the PLC.

5. In the Connection mechanisms area, select the Permit access with PUT/GET communication from remote partner check box.

   Note: This field will be disabled if you select the access level as NO Access.

6. Click OK.

Disable optimized block access

7. In the TIA software, locate the data block in the left tree.

8. Right-click the data block, and then click Properties. The properties dialog box appears.

   

9. In the left pane, click Attributes.

10. Click to clear the Optimized block access check box.

11. Click OK.

If the legacy communication is still not established, perform the following steps:

1. Go offline.

2. Compile-hardware rebuild (all).

3. Download to the PLC.