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MVI69E-MBS ♦ CompactLogix™ Platform
Configuring the MVI69E-MBS Using PCB
Modbus Serial Enhanced Communication Module
User Manual
ProSoft Technology, Inc.
Page 39 of 159
3.2
Module Configuration Parameters
3.2.1 Module Parameters
This section contains general module configuration parameters, including database
allocation and backplane transfer options.
In the ProSoft Configuration Builder (PCB) tree view, double-click
M
ODULE
.
Parameter
Value
Description
Module Name
ASCII
characters
(max. 38)
Assigns a name to the module that can be viewed using the
configuration/debug port. Use this parameter to identify the
module and the configuration file.
Read Register Start
0 to 9999
Specifies the start of the Read Data area in module memory.
Data in this area is transferred from the module to the
processor.
Read Register Count
0 to 10,000
Specifies the size of the Read Data area.
Write Register Start
0 to 9999
Specifies the start of the Write Data area in module memory.
Data in this area is transferred from the processor to the
module.
Write Register Count
0 to 10,000
Specifies the size of the Write Data area.
Backplane Fail Count
0 to 65535
Specifies the number of consecutive backplane transfer
failures that can occur before communications are halted.
Error/Status Block Pointer -1 to 9939
Starting register location in the module’s database for the
error/status table. If a value of -1 is entered, the error/status
data is not placed in the database. This data must be placed in
the read data range of module memory.
This data includes the module version information and all
server error/status data. Refer to MBS.STATUS (page 64) for
more information.
Initialize Input Image
Yes or No
This parameter determines if the input image data and the
module’s Read Register Data values are initialized with Read
Register Data values from the processor. If you set the
parameter to
No
, the Read Register Data values in the module
are set to 0 upon initialization. If you set the parameter to
Yes
,
the data is initialized with Read Register Data values from the
processor. This option requires associated ladder logic to pass
the data from the processor to the module.
Block Transfer Size
60, 120 or
240
Specifies the number of words in each block transferred
between the module and processor.
Slot Number
1 to x
Specifies the slot in the CompactLogix or MicroLogix 1500-
LRP rack for the module.
Important: The sum of the Read Register Count and Write Register Count cannot exceed 10,000 total
registers. Furthermore, neither the Read Data nor the Write Data area may extend above module register
9999. The Read Data and Write Data areas must not overlap.