ProSoft Technology 5202-DFNT-DFCM4 - Manual (Page 11)

DFCM ♦ ProLinx Gateway Functional Overview
DF1 Master/Slave Driver Manual
ProSoft Technology, Inc. Page 11 of 88
October 15, 2010
1.2 Module Internal Database
The internal database is central to the functionality of the module. This database
is shared between all the ports on the module and is used as a conduit to pass
information from one device on one network to one or more devices on another
network. This permits data from devices on one communication port to be viewed
and controlled by devices on another port. In addition to data from the slave and
master ports, status and error information generated by the module can also be
mapped into the internal database.
1.2.1 DF1 Serial Port Driver Access to Database
The following diagram describes the flow of data between the serial port drivers
and the internal database.
The Master driver uses the database in two ways:
1 A read command issued to a slave device by the master driver will return the
slave data into the internal database
2 A write command issued to a slave device by the master driver uses the data
in the internal database to write to the slave device
The slave driver accesses data from the internal database. External DF1 master
devices can monitor and control data in this database through these slave
port(s). Setup of the slave ports only requires the CFG file.