ProSoft Technology MVI46-DFNT - Manual (Page 113)

MVI46-DFNT ♦ SLC Platform Reference
EtherNet/IP Client/Server Communication Module User Manual
ProSoft Technology, Inc. Page 113 of 177
October 12, 2010
4.11 General Command Structure
DF1 Master Port Command
Structure (File for each Master
Port) Description
Communicati
on Module
Information Enable/Type Word 0=Disabled, 1=Continuous, 2=Conditional and 999=Poll. The
conditional type only applies to the write functions.
Virtual Database Address This parameter defines the virtual database register to be
associated with the command.
Poll Interval Minimum time in tenths of a second to wait before polling with this
command.
Count Number of data values or registers to be considered by the
function.
Swap Type Code Swap type code for command: 0=None, 1=Swap words, 2=Swap
words & bytes and 3=swap bytes in each word.
Device
Information Node Address Node address of unit to be reached on the data highway.
Function Code This parameter defines the module function code to be
associated with the command. Each function code requires a set
of parameters to construct the DF1 message.
Parameters Up to four parameter fields can follow the function code field to
define the element or data register to be considered by the
function.
Note that the Node Address field in the serial implementation has been expanded
to two fields: IP Address and Slot Number in the DFNT Ethernet implementation.
This is required for network support. The IP Address specifies the IP address of
the device to reach on the network. The Slot Number has specific meaning
determined by the processor. For ControlLogix processors, the Slot Number is
the location in the ControlLogix rack of the processor. For a four-slot rack, this
parameter would have a valid range of 0 to 3. For the PLC5 and SLC family of
processors, the Slot Number parameter is always set to -1. These processors do
not have a slot number in the path field as the Ethernet interface is resident on
the processor.
The following tables define the parameters required for each function.