Tools -> Parameter VM Mapping (0BA7 and later versions only)

VM overview

LOGO! Base Module uses VM (Variable Memory) as a local data communication interface for data exchange by means of connections/data-transfer configuration.
You can use LOGO!Soft Comfort with the Ethernet connections menu command following instructions in the Tools -> Ethernet Connections (0BA7 and later versions only) section to construct the network topology.
LOGO!Soft Comofort performs data exchange process as follows:

• The server stores the required data into the VM area specified by the data connection and data transfer. This is defined as a "share" action in the following section.
  
• The client unit reads the server's VM area and then updates the corresponding local VM area in its network process step.
  
• After the local update, the circuit program in the client can use the information in the local VM originated from the Server.               

Note LOGO! 8.FS4 supports two types of connection, S7 and Modbus. LOGO! 0BA7 and LOGO! 0BA8 only supports S7 connection.