ProSoft Technology MVI69-DFCM - Manual (Page 31)

Configuring the MVI69-DFCM Module MVI69-DFCM ♦ CompactLogix or MicroLogix Platform
DF1 Interface Module
ProSoft Technology, Inc. Page 31 of 117
November 3, 2008
2.3.23 File Offset
This parameter sets the database register location of the first element in the first
file simulated in the module. All offsets in the first file and subsequent files will be
computed using the address specified. Enter a value in the range of 0 to 4999.
2.4 [DFCM Port x Commands]
This section defines the commands to be issued from the module to server
devices on the network. These commands can be used for data collection and/or
control of devices on the network.
[DF1 Port 1 Commands]
# The file contains examples for a SLC 5/03 processor.
#
# LOCATION :
# DATE : 06/24/99
# CONFIGURED BY: RAR
# MODIFIED :
# 07/23/99 -- Set to read more data file types.
#
START
# 1 2 3 4 5 6 7 8 9 10 11
# Internal Poll Swap Node Func File File Elm Sub
# Enable Address Interval Count Code Address Code Type # # Elm
1 10 0 10 0 10 501 N 7 0
1 1500 0 10 0 10 502 N 7 0 0
1 10 0 10 0 10 509 N 7 10
END
2.4.1 Command List Overview
In order to interface the module with other nodes, you must construct a command
list of up to 100 user-defined commands. The commands in the list specify the
device to be addressed, the function to be performed (read or write), the data
area in the device to interface with, and the registers in the internal database to
be associated with the device data. The command list is processed from top
(command #0) to bottom. A poll interval parameter is associated with each
command to specify a minimum delay time in tenths of a second between the
issuance of a command. If the user specifies a value of 10 for the parameter, the
command is executed no more frequently than every (1) second.
Write commands have a special feature, as they can be set to execute only if the
data in the write command changes. If the register data values in the command
have not changed since the command was last issued, the command will not be
executed. If the data in the command has changed since the command was last
issued, the command is executed. Use of this feature can lighten the load on the
network. In order to implement this feature; set the enable code for the command
to a value of 2.
The module supports numerous commands. This permits the module to interface
with a wide variety of devices.