ProSoft Technology MVI71-MCM - Manual (Page 38)

MVI71-MCM ♦ PLC Platform Diagnostics and Troubleshooting
Modbus Communication Module
Page 38 of 111 ProSoft Technology, Inc.
December 28, 2007
4.1.5 Main Menu
When you first connect to the module from your computer, your terminal screen
will be blank. To activate the main menu, press the [?] key on your computer's
keyboard. If the module is connected properly, the following menu will appear on
your terminal screen:
Caution: Some of the commands available to you from this menu are designed for
advanced debugging and system testing only, and can cause the module to stop
communicating with the processor or with other devices, resulting in potential data loss
or other failures. Only use these commands if you are specifically directed to do so by
ProSoft Technology Technical Support staff. Some of these command keys are not
listed on the menu, but are active nevertheless. Please be careful when pressing keys
so that you do not accidentally execute an unwanted command.
Opening the Data Analyzer Menu
Press [A] to open the Data Analyzer Menu. Use this command to view all bytes
of data transferred on each port. Both the transmitted and received data bytes
are displayed. Refer to Data Analyzer for more information about this menu.
Important: When in analyzer mode, program execution will slow down. Only use this
tool during a troubleshooting session. Before disconnecting from the Config/Debug
port, please press [S] to stop the data analyzer, and then press [M] to return to the
main menu. This action will allow the module to resume its normal high speed
operating mode.
Viewing Block Transfer Statistics
Press [B] from the Main Menu to view the Block Transfer Statistics screen.
Use this command to display the configuration and statistics of the backplane
data transfer operations between the module and the processor. The information
on this screen can help determine if there are communication problems between
the processor and the module.
Tip: To determine the number of blocks transferred each second, mark the numbers
displayed at a specific time. Then some seconds later activate the command again.
Subtract the previous numbers from the current numbers and divide by the quantity of
seconds passed between the two readings.