ProSoft Technology MVI56E-SIE - Manual (Page 150)

Reference MVI56E-SIE ♦ ControlLogix Platform
User Manual Client Communication Module
Page 150 of 168 ProSoft Technology, Inc.
September 6, 2012
5.2.3 Client Driver
In the Client driver, the MVI56E-SIE module issues read or write commands to
servers on the Siemens Industrial Ethernet network using up to 20 simulated
Clients. The commands originate either from the module's user-configured Client
x Command List for each Client. The commands from the Client x Command List
are executed either via routine polling or as a result of special Command Control
block requests from the processor. Client status data is returned to the processor
in special Client Status blocks. The following flowchart describes the flow of data
into and out of the module.
1 The Client driver obtains configuration data when the module restarts. This
includes the timeout parameters and the Command List. These values are
used by the driver to determine the types of commands to be issued to
servers on the Siemens Industrial Ethernet network.
2 When configured, the Client driver begins transmitting read and/or write
commands to servers on the network. The data for write commands is
obtained from the module's internal database.
3 Assuming successful processing by the server specified in the command, a
response message is received into the Client driver for processing.