Installation and Upgrade Guide Owner's manual

Publication 1757-IN040B-EN-P - March 2002
11-24 Performance and Capacity Specifications
† These numbers may be further limited by other restrictions noted in
this document.
Table 11.P 1757-FIM Performance Limits
FIM Performance Limits Per FIM Per Link Per Device
Burst Sustained Burst Sustained Burst Sustained
H1 Link Publication Rate (parameters/second, pps)
‡
Assumes
≥
50% of link schedule is usable for client-server messaging.
--- 32‡ --- 16‡ --- 16‡
Client-Server Store Rate‡ (pps) [excludes publications from
ProcessLogix function blocks]
‡
Assumes
≥
50% of link schedule is usable for client-server messaging.
* This assumes that the FF device supports AlterEventConditionMonitoring, the ability
to suppress Update Events. Otherwise reduce by factor of 2.
40 10* 20 5* 4 1*
Max number of slow history points. ‡
†
All parameters must be in one view list per device or published.
‡ Assumes
≥
50% of link schedule is usable for client-server messaging.
--- 40 --- 20† --- 20†
Max number of read-activities per second. ‡ (A read-activity
includes any or all of a block view list parameters or a single
non-viewed parameter.) [Includes all users such as slow history, SCM
connections to non-published parameters, Excel or OPC reads of
non-published parameters, etc.]
‡
Assumes
≥
50% of link schedule is usable for client-server messaging.
10 10 5 5 2 2
Maximum number of parameters read per second. ‡ [Includes all
users such as CM connections to non-output parameters (e.g. tuning
constants or limits), SCM connections to non-published parameters,
Excel or OPC reads of non-published parameters, etc.)
‡
Assumes all parameters read are in view lists and the average number of parameters
read and used per view is 8; Also assumes
≥
50% of link schedule is usable for
client-server messaging.
80 80 40 40 16 16
Maximum Alert Rate per second. (Alarm and Return-to-Normal
reports) ‡
‡
Assumes
≥
50% of link schedule is usable for client-server messaging and bursts are
up to one minute apart.
50 2 50 2 2 1
Maximum Number of Devices 32† 16† ---