Rockwell Automation 1757-SWKIT3200 ProcessLogix R320.0 Installation and Upgrade Guide - Manual (Page 238)

Publication 1757-IN032B-EN-P - April 2001
6-22 New Functions and Features
•
Further optimization of tag arrays is provided in this release to
allow up to 243 SINTs or 121 DINTs in a single optimized
packet as compared to 121 SINTs or 81 DINTs when using
non-arrayed tags.
•
Also provided is further optimization of boolean tag arrays.
An individual boolean tag is represented as a 32 bit word in
the controller, however a boolean tag array is stored as a bit
array. With this release, you can read a boolean array of up to
3872 items.
(1)
•
An improved mechanism has been provided to recognize
changed tag information in a controller. The first time an
element is requested, the tag information is read from the
controller. No further changes to the tag information will be
recognized until all current items are taken off scan. The next
time an item is requested from the controller, the change log
is checked to determine if the tag information needs to be
updated. If not, RSLinx will use the current information.
Specify the use of CIP connections •
In the “Configure CIP Options” dialog you can specifying the use
of CIP connections for write operations. The default configuration
is to not use connections for write operations. This option should
be selected when attempting to write data to the controller while
maintaining a larger number of tags on scan and getting timeout
messages.
OPC Data Access 2.0 functionality
•
RSLinx 2.2 is compliant with the OPC Data Access 2.0
specification. This includes installation of the OPC proxy
components provided from the OPC Foundation.
OPC Automation interface
•
You can develop programs in VB/VBA to read/write data using the
OPC interface.
OPC browse enhancements •
With the OPC Browse interface in RSLinx, you can directly read
tag information from a CL5550 without requiring a symbol file
association with a Topic.
Version information
•
The RSLinx OPC Server supports version information to an OPC
Client.
Enhanced Ethernet driver •
The exiting Ethernet driver has been enhanced to allow
configuration of 1756-Enet modules in addition to the existing
PLC-5/SLC-5 definitions. Now you can have a single Ethernet
driver with up to 255 node definitions instead of a single driver
for each 1756-Enet module.
(1)
Array optimization occurs when all tags are put on scan at the same time. Once an element or group of
elements are on scan, they will not be re-optimized if additional array elements are requested.