ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 76)

Diagnostics and Troubleshooting MVI56E-MCM ♦ ControlLogix Platform
User Manual Modbus Communication Module
Page 76 of 199 ProSoft Technology, Inc.
June 18, 2014
5.1.1 Scrolling LED Status Indicators
The scrolling LED display indicates the module’s operating status as follows:
Initialization Messages
Code Message
Boot / DDOK Module is initializing
Ladd Module is waiting for required module configuration data from
ladder logic to configure the Modbus ports
Waiting for Processor Connection Module did not connect to processor during initialization

Sample ladder logic or AOI is not loaded on processor
 Module is located in a different slot than the one
configured in the ladder logic/AOI
 Processor is not in RUN or REM RUN mode
Last config: <date> Indicates the last date when the module changed its IP
address. You can update the module date and time through
the module’s web page, or with the MVI56E Optional Add-On
Instruction.
Config P1/P2 <Modbus mode>
<Port type> <Baud> <Parity>
<Data bits> <Stop Bits> <RS
Interface> <ID (Slave)> <Cmds:
(Master)> After power up and every reconfiguration, the module will
display the configuration of both ports. The information
consists of:

Modbus mode: RTU/ASCII
 Port type: Master/Slave
 Baud: 115200 / 57600 / 38400 / 19200 / 9600/ 4800 /
2400 / 1200 / 600 / 300
 Parity: None / Even / Odd
 Data bits: 7 / 8
 Stop bits: 1 / 2
 RS Interface: RS-232 / RS-422 / RS-485
 ID: Slave Modbus Address
 Cmds: Configured Modbus Master Commands
Operation Messages
After the initialization step, the following message pattern will be repeated.
<Backplane Status> <IP Address> <Backplane Status> <Port Status>
Code Message
<Backplane Status> OK: Module is communicating with processor
ERR: Module is unable to communicate with processor. For
this scenario, the <Port Status> message above is replaced
with "Processor faulted or is in program mode".
<IP Address> Module IP address
<Port Status> OK: Port is communicating without error
Master/Slave Communication Errors: port is having
communication errors. Refer to Diagnostics and
Troubleshooting (page 75) for further information about the
error.