Rockwell Automation 1757-SWKIT4000 ProcessLogix R400.0 Installation and Upgrade Guide - Manual (Page 275)

Publication 1757-IN040B-EN-P - March 2002
Performance and Capacity Specifications 11-23
FIM Performance Limits The FIM is a complex device interfacing the high-speed ProcessLogix
internal networks to the 31.25 Kbps FF H1 links. It uses an advanced
caching scheme to maintain quick response to reasonably fresh values
and maintains communications with the multiple FF devices as time
permits in the prioritized scheme of the Link Schedule based on FF
specification requirements. This table describes limits of performance
through the FIM.
The FIM cache (one for both links) holds 800 items. An item can be:
•
A simple parameter
•
A structured parameter
•
An arrayed parameter
Quality of service is based on priorities. Priorities of service are
(highest to lowest)
•
Incoming H1 Subscriptions and outgoing H1 Publications, per
LAS
•
H1 Alerts
•
H1 Writes
•
New H1 reads (and re-written parameters)
•
H1 Re-reads to refresh the cache
PROFIBUS Device Profiles Supported
(with custom function blocks) PROFIDRIVE, Encoder
Devices supported with custom function blocks Siemens Simatic ET200M I/O, Siemens Simocode
3UF5 Motor Protection and Control Unit
Data types supported by the “Generic” PROFIBUS
Channel Blocks
(1)
Single bit (Discrete),
8 bit signed/unsigned integer,
16 bit signed/unsigned integer,
32 bit signed integer
(1) The “generic” function blocks are capable of communicating with various PROFIBUS devices. The data types required/supplied by
the device are a consideration in the determination of whether or not a specific device can be used with these blocks.
Table 11.O Profibus Capacity/Topology Specifications
PFB Module and PROFIBUS Block Specifications