csmstr - Omega Engineering

CONFIGURING COMMUNICATIONS
PROTOCOL CONVERSION
READ/WRITE VARIABLES
Certain module data are read/write variables, allowing them to be controlled by the PLC or
HMI to which the MC is connected. To map writeable variables, follow the same procedure
as shown above, but this time, set the Direction property to Device to MC. Note that with the
Direction property set for Device to MC, only writable variables will appear in the right pane.
In the above example, modules one through four have their setpoints mapped to PLC registers
N011:0000 through N011:0003. As a result, the Master will poll the contents of the PLC
registers, and write them into the respective module variables.
PROTOCOL CONVERSION
In addition to mapping module data, Gateway Blocks can also be used to expose data that is
obtained from other remote devices, or to move data between two such devices. This unique
protocol conversion feature allows much tighter integration between elements of your control
system, even when using simple, low-cost devices.
MASTER AND SLAVE
Exposing data from other devices over a slave protocol is simply an extension of the mapping
process described above, except this time, instead of dragging a tag from the right-hand pane,
you should expand the appropriate master device, and drag across the icon that represents the
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