ProSoft Technology MVI69-ADM - Manual (Page 113)

MVI-ADM ♦ 'C' Programmable Creating Ladder Logic
'C' Programmable Application Development Module Developer's Guide
ProSoft Technology, Inc. Page 113 of 342
February 20, 2013
The last branch of the rung performs the BTW message operation. This
operation will be recognized by the module, and the data contained in the
received BTW block will be processed by the module. If the data contained in the
block is normal write data, the data will be placed in the module's internal
database. If the block is a special control block (for example, warm-boot block),
the module will perform the selected operation.
Side-Connect Interface
When the side-connect interface is used, no ladder logic is required for normal
data transfer. The module directly reads and writes information between the
module and the processor using the user data files defined. The SC_DATA.TXT
file contains the file number to be used for the configuration file. This file number
and the module configuration determine the set of user data files required in the
PLC.
In order to perform special control of the module (for example, warm-boot
operation), ladder logic is required. A reserved area in the configuration file is
constantly monitored by the module (elements 80 to 139). If the module
recognizes a valid control command code in element 80, it will use the data in the
block to perform the requested operation. For example, to perform a warm-boot
operation on the module, copy a value of 9998 into element 80 of the
configuration file. The module should perform the warm-boot operation and reset
the register value back to zero.