ProSoft Technology MVI46-MBP - Manual (Page 18)

MVI46-MBP ♦ SLC Platform Installing and Configuring the Module
Modbus Plus Communication Module
Page 18 of 101 ProSoft Technology, Inc.
February 19, 2008
Changing Parameters During Operation
Changing values in the configuration table can be done at any time. Because the
module is operating using the live data in the internal database, any changes
made to the database become immediately active. This permits remote
programming of the module by any node on the Modbus Plus network. Care
must be taken when altering the parameters in an order that will not disturb any
running processes. New configuration data can be downloaded from the
database to the SLC processor by executing a write command with a value of
9997 to register 4370 in the module's internal database or M1 file. To force the
module to perform a warm-boot or cold-boot operation, write to register 4370 with
values of 9998 and 9999, respectively.
The only parameters that must be set through a restart of the module are related
to the read and write data sizes and registers for data transfer. These parameters
cannot be changed while the module is operating as it could place the module in
an inoperable mode.