Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 107)

Chapter
7
Publication 2755-6.8
Communicating with an SLC
on a DHĆ485 Network
This application describes how to connect and configure two
AdaptaScan Bar Code Readers to communicate with an SLC 5/03 or
5/04 processor over a DH-485 network in a master mode.
The DeviceNet network has the following nodes:
•
SLC 5/03 or 5/04 on node 1
•
AdaptaScan Bar Code Reader on node 2
•
AdaptaScan Bar Code Reader on node 3
When configuring a DH-485 network with AdaptaScan Readers, the
nodes must be in the following order:
•
SLC on node 1
•
AdaptaScan Readers immediately follow SLC (node 2, node 3,...)
•
Other network devices (e.g., DTAM Plus) follow the AdaptaScan
Readers
Avoid node gaps to prevent the AdaptaScan Reader from Soliciting
of Successor (SOS). This will maximize bar code throughput as it is
sent to the SLC. The priority should be on processing bar code data
not on finding node gaps.
The hardware items required for this application are:
•
2755-SN3, -SN5 or -SN8 AdaptaScan Bar Code Reader
•
2755-NB40 or -NB41 Wiring Base
•
2755-PW46 or -PW47 Power Supply
•
2755-NC43 or -NC48 Configuration Cable
•
1747-L532 or -L54x SLC processor
•
1746 Chassis and 24V dc Power Supply
•
1747-CP3 RS-232 Programmer Cable
•
1747-AIC Isolated Link Coupler or 1761-NET-AIC Advanced
Interface Converter
•
1747-PIC RS-232/DH-485 Converter
•
Computer running Windows 3.1 (or later) or Windows 95
•
9-to-25 Pin Adapter (for computer with a 25-pin COM port)
The software requirements for this application are:
•
2755-ASN AdaptaScan Offline Programming Software
•
9323-PA2x SLC 500 Advanced Programming Software (The
original ICOM SLC software is not compatible with this
AdaptaScan network configuration.)
Overview
Hardware Requirements
Software Requirements