MVI56E-MCMR ♦ ControlLogix Platform
Reference
Modbus Communication Module with Reduced Data Block
User Manual
ProSoft Technology, Inc.
Page 151 of 223
Module Status Block (9250)
The
General Module Status
block contains some basic information about the
module itself and diagnostic counters to help monitor activity on each port and
across the ControlLogix backplane. The block can be requested as needed and
is available regardless of whether the module's ports are configured as Masters
or Slaves. Use block identification code 9250 to request this
General Module
Status
block.
This block of data is requested using the "Get Attribute Single" service type MSG
instruction.
The following table describes the format of the 33-word data block returned to the
processor by this MSG instruction.
Block Response from Module to Processor
Word Offset Content
Description
0
Program Scan Count
This value is incremented each time a complete
program cycle occurs in the module.
1 to 2
Product Code
The four bytes of these two words contain the ASCII
code values of the 4-letter product code.
3 to 4
Product Version
These two registers contain the product version of the
current running module firmware.
5 to 6
Operating System
These two registers contain the month and year
values for the program operating system.
7 to 8
Run Number
These two registers contain the run number value for
the currently running software.
9
Port 1 Command List
Requests
When Port 1 is a Master, this field contains the
number of requests made from Port 1 to Slave
devices on the network.
10
Port 1 Command List
Response
When Port 1 is a Master, this field contains the
number of Slave response messages received on the
port.
11
Port 1 Command List Errors When Port 1 is a Master, this field contains the
number of command errors processed on the port.
These errors could be due to a bad response or bad
command.
