It is essential that the S7 PLC in question (one of them) supports the use of the following blocks:
SFC67 – "X_GET"; SFC68 – "X_PUT"; SFC69 – "X_ABORT".
To establish a connection to another PLC, the first "X_PUT" call sends a structure with the connection information. Each subsequent "X_PUT" and "X_GET" call exchanges data about this connection.
If communication with another PLC is desired, the established connection must be terminated and a new one created by sending a new structure with its data.
The installation files included with the IBH Links also contain examples of STEP 7 programs using these links.
With these connections, without an S7 link, communication with only one PLC at a time is not possible. If multiple simultaneous connections are required, PLCs that support S7 links must be used.
The IBH Link is distributed by AN Consult, SL.
