Rockwell Automation 1756-NEX Nexus Module - Manual (Page 19)

About the 1756-CLX/C Module 1-7
Publication 1756-UM524B-EN-P - December 2008
Process Overview
The figure below shows the flow of data to and from the 1756-CLX/C module.
Control Logix
TAGs
Windo ws NT4.0 with SP6a (UDP/IP)
NX/SAM
NX Dlink daemons and library
56SAM
Ethernet Port
Recv -Process
(nx_sam_recv.exe)
Functions to Start/Stop
NX Dlink
Functions
to receive
Functions
to send
Recv -Parameters
and data NX90,91
Application (Ladder)
Monitor Process
(nx_sam_mon.exe)
Send -Process
(nx_sam_send.exe)
System Transaction Transaction Data
Syst em Status
NX20 ` NX51
Connected Data Transfer
Shared
Memory
System
Configuration
NX00 ` 07
System Status
NX20 ` NX51
LED
Segment
Display
System Configuration
NX00 ` 07
System Status
NX20 ` NX51
Unconnected Data Transfer
Management Process
(nx_sam_man.exe)
Send -Parameters
and data NX80
System Transaction
Recv Process
(nx_sam_srecv .exe)
ControlLogix
Application ladder
Tags
System status
(NX20 - NX51)
System config.
(NX00 - NX07)
Recv. parameters and
data (NX90 and NX91)
Send parameters and
data (NX90 and NX91)
Shared
memory
Unconnected data transfer
System status
(NX20 - NX51)
1756-CLX/C module
Management process
(nx_sam_man.exe)
System status
(NX20 - NX51)
System config. (NX00
- NX07)
LED segment
display
Monitor process
(nx_sam_mon.exe)
Sys. transact. recv.
(nx_sam_mon.exe)
Receive process
(nx_sam_recv.exe)
Send process
(nx_sam_send.exe)
Functions to
start/stop NX Dlink
Functions to receive Functions to send
System transaction Transaction data
NX Dlink daemons and library
Windows NT 4.0 with SP6a (UDP/IP)
Ethernet port
1756-CLX/C module
Connected data transfer