ProSoft Technology MVI56E-MCM/MCMXT User Manual
Page 106
Diagnostics and Troubleshooting
MVI56E-MCM ♦ ControlLogix Platform
User Manual
Modbus Communication Module
Page 106 of 199
ProSoft Technology, Inc.
June 18, 2014
Port Configuration
Use the Port Configuration menu to view configuration settings for Modbus Port 1
and Modbus Port 2. The values on this menu correspond with the controller tags
MCM.CONFIG.Port1 and MCMPort (page 155).
Master Command List
Use the Master Command List menu to view the command list settings for
Modbus Port 1 and Modbus Port 2. The values on this menu correspond with the
controller tags MCM.CONFIG.P
ORT
1M
ASTER
C
MD
and
MCM.CONFIG.Port2MasterCmd.
Use the scroll bar on the right edge of the window to view each Modbus Master
command.
Note: The Master Command List is available only if the port is configured as a Modbus Master.
Master Command Status
Use the Master Command Status menu to view Master command status for
Modbus Port 1 and Modbus Port 2.
A zero indicates no error.
A non-zero value indicates an error. Refer to Command Error Codes (page 69)
for an explanation of each value.
Slave Status List
Use the Slave Status List menu to view the status of each Slave connected to the
Modbus Master port.
Slaves attached to the Master Port can have one of the following states:
0
The Slave is inactive and not defined in the command list for the Master Port.
1
The Slave is actively being polled or controlled by the Master Port. This does not
indicate that the Slave has responded to this message.
2
The Master Port has failed to communicate with the Slave device. Communications
with the Slave is suspended for a user defined period based on the scanning of the
command list.
3
Communications with the Slave has been disabled by the ladder logic. No
communication will occur with the Slave until this state is cleared by the ladder
logic.
Refer to Slave Status Blocks (3000 to 3003 or 3100 to 3103) (page 123) for more
information.
Port Status
Use the Port Status menu to view status for Modbus Port 1 and Modbus Port 2.
During normal operation, the number of requests and responses should
increment, while the number of errors should not change.