ProSoft Technology MVI69-MCM - Manual (Page 52)

Configuring the MVI69-MCM Module MVI69-MCM ♦ CompactLogix or MicroLogix Platform
User Manual Modbus Communication Module
Page 52 of 167 ProSoft Technology, Inc.
March 22, 2011
Write Register Count
0 to 5000
The Write Register Count parameter specifies the size of the Write Data area of
module memory and the number of registers to transfer from the processor to
this memory area, up to a maximum value of 5000 words.
Note: Total Read Register Count and Write Register Count cannot exceed 5000 total registers.
Read Data and Write Data Areas must be configured to occupy separate address ranges in
module memory and should not be allowed to overlap.
Backplane Fail Count
0 to 65535
This parameter specifies the number of consecutive backplane transfer failures
that can occur before communications should be halted.
Error/Status Block Pointer
-1 to 4939
Starting register location in virtual Modbus database for the error/status table. If a
value of -1 is entered, the error/status data will not be placed in the database. All
other valid values determine the starting location of the data. This data area
includes the module version information and all server error/status data. Refer to
Status Data Definition for more information.
Initializing Output Data
Y
ES
or N
O
This parameter determines if the output data for the module should be initialized
with values from the processor. If the value is set to N
O
(0), the output data will
be initialized to 0. If the value is set to Y
ES
(1), the data will be initialized with
data from the processor. Use of this option requires associated ladder logic to
pass the data from the processor to the module.
Block Transfer Size
60, 120 or 240
This read-only parameter specifies the number of words in each block transferred
between the module and processor.