Diagnostics and Troubleshooting MVI56-MCM ♦ ControlLogix Platform
Modbus Communication Module
ProSoft Technology, Inc. Page 71 of 159
July 24, 2008
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.
Viewing Module Configuration
Press [C] to view the Module Configuration screen.
Use this command to display the current configuration and statistics for the
module.
Opening the Database Menu
Press [D] to open the Database View menu. Use this menu command to view the
current contents of the module's database.
Opening the Command Error List Menu
Press [E] to open the Command Error List. This list consists of multiple pages of
command list error/status data. Press [?] to view a list of commands available on
this menu.
Viewing the Slave Status List (Port 1 and 2)
Press [O] (port 1) or [P] (port 2) to view the 256 slave status values associated
with the ports. The slave status values are defined as follows:
0 = slave is not used,
1 = slave being actively polled,
2 = slave suspended and
3 = slave disabled.
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