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Siemens LOGO Soft Comfort Online Help Manual

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LOGO!Soft Comfort Online Help
118 Operating Instructions, 11/2017
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.
Data type and VM address
The following illustrates VM addressing and data type usage:
Creating a parameter VM mapping
When you change a parameter value in the local VM, the value in LOGO!Soft Comfort
changes accordingly. In this way, LOGO!Soft Comfort synchronizes information with the
local VM in real time.
LOGO!Soft Comfort synchronizes the parameter values of a block to the specified VM in
each LOGO! cycle. After the synchronization, LOGO! Base Module can use the VM to
communicate with other SIMATIC devices. You can map up to 64 parameters in VM for each
LOGO! Base Module in the Variable Memory Configuration dialog. The following screen is
an example of the configuration dialog of parameter VM mapping:
… 118 …


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