Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 14)

Publication 1794-UM064B-EN-P - May 2014
2 Overview of the FLEX I/O PROFIBUS APBDPV1 Module
Purpose of the FLEX I/O
PROFIBUS
APBDPV1 Adapter The 1794-APBDPV1 module is a FLEX I/O communications adapter that
interacts with the FLEX I/O backplane and any PROFIBUS DP master/scanner
controller on a PROFIBUS DP network.
The 1794-APBDPV1 module is a slave device to the DP master/scanner, and is a
master controller of the FLEX I/O system where it is installed. The I/O data
exchange occurs as follows: Output data is sent from the DP master/scanner
controller across the PROFIBUS DP network to the 1794-APBDPV1 adapter.
The adapter then automatically transfers the data across the FLEX I/O backplane
to the output modules. Inputs from the input modules are collected by the FLEX
I/O adapter via the backplane and sent across the PROFIBUS DP network to the
DP master/scanner controller.
Differences Between APB
and APBDPV1 Adapters This section describes the differences between the 1794-APB FLEX I/O
PROFIBUS and the 1794-APBDPV1 FLEX I/O PROFIBUS APBDPV1
adapter modules.
DP-V1 Protocol
The FLEX I/O PROFIBUS APBDPV1 adapter uses a newer version of
PROFIBUS DP (DP1) protocol whereas the The FLEX I/O PROFIBUS
APB adapter uses the first generation PROFIBUS DP protocol (DP-0).
Functionality
The FLEX I/O PROFIBUS APBDPV1 adapter features Identification &
Maintenance (I&M) functions. These functions specify how certain device
describing data must be unambiguously stored in PROFIBUS devices essentially
enabling easy access to current information on the device. The adapter also
supports newer HART modules than the The FLEX I/O PROFIBUS APB
adapter.
RS-485
PROFIBUS DP
master/scanner
controller
Other DP
adapter/slave
DP
1794-APBDPV1 adapter/slave
FLEX I/O system
Other DP
adapter/slave
Personal computer
with configuration
software
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