ProSoft Technology MVI94-MCM-MHI - Manual (Page 20)

Configuration MVI94-MCM ♦ Flex I/O Platform
User Manual Serial Communications Modbus Communication Module
Page 20 of 109 ProSoft Technology, Inc.
March 29, 2011
3.1 [Module]
[Section]/Item Value Range Description
[Module] Configuration header for Module.
Module Name: Up to 80
chars
Name of the module to use on reports. Use this
parameter to identify your module in your system.
Maximum Register: 1 to 3996 This parameter defines the maximum register in
the virtual Modbus database. You should size the
database for your application, leaving room for
expansion in the future. Requests for registers
outside of the range selected are returned with an
error message.
Error/Status Block
Pointer:
-1 to 3995 This value represents the relative starting position
in the module's internal Modbus database where
the Error/Status data is stored. The table can be
placed anywhere in the module's data space. The
content of the Error/Status table is updated at the
frequency defined in the following parameter. If a
value of -1 is set for the parameter, the data is not
placed in the database.
Error/Status
Frequency:
0 to 65535 This parameter specifies the number of program
cycles between each update of the Error/Status
block data in the module. If the parameter is set to
a value of 0, the data is never updated.
BT Read Start
Register:
0 to 3995 This parameter specifies the starting register in
the internal Modbus database to write over the
backplane.
BT Read Register
Count:
12 to 3996 This parameter specifies the number of registers
in the internal Modbus database to write over the
backplane. This parameter computes the number
of blocks to transfer from the module to the
backplane. The number of blocks must be >=2 for
proper backplane data transfer.
BT Write Start
Register:
0 to 3995 This parameter specifies the starting register in
the internal Modbus database to fill with data read
over the backplane.
BT Write Register
Count:
12 to 3996 This parameter specifies the number of registers
in the internal Modbus database to consider from
the read operations over the backplane. This
parameter computes the number of blocks to
transfer from the backplane to the module. The
number of blocks must be >=2 for proper
backplane data transfer.
Backplane Fail
Count:
0 to 65535 This parameter specifies the number of
consecutive backplane transfer failure before
communications is disabled. If the parameter is
set to a value of 0, communications is not
disabled.