Using Controller Tags MVI69L-MBS ♦ CompactLogix Platform
User Manual Communication Module
Page 82 of 154 ProSoft Technology, Inc.
January 6, 2014
5.4 Controller Tag Overview
Configuration information
MBS input and output data transferred between the processor
and the module
Governs the data movement between the PLC rack and the
module
Generic tags used for internal ladder processing (DO NOT
MODIFY)
The following sections describe each of these controller tag structures in more
detail.
5.4.1 MBS.CONFIG
When PCB downloads the configuration file from the PC to the processor, the
configuration file data and its CRC are stored in this array.
Edits cannot be done directly in this array. All configuration edits must be done in
PCB since a unique CRC is calculated for data integrity. Any change to the
configuration parameters directly in this array will not match the calculated CRC.
This parameter contains the MBS configuration data after it has
been downloaded from PCB. It is displayed in ASCII format.
Note: MBS configuration changes cannot be made directly in this
array; the configuration must be downloaded via PCB.
Configuration file size (MBS.CONFIG.FileData array) in bytes.
CRC checksum of the configuration file stored in the array.
Configuration file status. 0 = No file present, 1 = File present
5.4.2 MBS.DATA
This structure contains the Read Data and Write Data arrays for processor-to-
module communication.
Data area copied from the module to the processor. This 240-
element array stores the Modbus data coming into the module
from the Modbus network.
Data area copied from the processor to the module. This 240-
element array stores the outgoing data sent from the module
to the Modbus network.
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