ProSoft Technology 5202-DFNT-DFCM4 - Manual (Page 18)

DFCM Slave Driver Operation DFCM ♦ ProLinx Gateway
Driver Manual DF1 Master/Slave
Page 18 of 88 ProSoft Technology, Inc.
October 15, 2010
3.1 File Simulation
The PLC5 and SLC command sets require the use of data files. These entities
are simulated in the module and are configured by the user. Data in these
processors are stored in files such as N10:, F20: and A25:. Each file has a
defined element size and length. The module simulates these files by assigning
each element to a word-size (two bytes) register in the module’s database, and
each file is set to a fixed, user-defined length. These files are mapped to the
database under user control. A discussion of each parameter related to the file
simulation is given below along with an example.
[SECTION]/Item Range Description
[DF1 PORT 0]
[DF1 PORT 1]
[DF1 PORT 2]
[DF1 PORT 3] Configuration Header for Port 0
Configuration Header for Port 1
Configuration Header for Port 2
Configuration Header for Port 3
First File: This parameter defines the first file number recognized by
the module. If the value is set to 7, all requests for files
less than 7 will be returned as an error message. Files
greater than or equal to 7 will be processed as long as
the elements referenced are valid for the database. If a
request is received for an element beyond the last
register in the database, the module will return an error
message.
File Size: This parameter defines a constant size for all files
simulated by the module. If the parameter is set to 100,
all files will contain 100 elements. If the First File
parameter is set to 7 and the File Size parameter is set to
100, all files (N7:, N8:, N9...) will contain 100 elements.
File Offset:
This parameter defines the starting address in the
module’s internal database to be associated with the first
element in the first file to be simulated. For example, if the
First File parameter is set to 7 and the File Offset
parameter is set to 1000, file element N7:0 will
correspond to database register 1000 and N7:100 will
correspond to register 1100.