Performance; Performance Tests - Honeywell CIPer 50 User Manual

Performance

Performance tests

The system boundaries are hard to define, as they depend on many factors, such the boundaries of the hardware
performance in general, the network performance, the "traffic" created by the application, concurrent polls from
Supervisors, Station Save intervals, Recovery Service intervals, etc.
In addition to the general Tridium guidance of a maximum of 80% CPU load, Honeywell has undertaken two
exemplary performance tests.
The maximum recommended CPU usage is outlined in the two tables below.
No. of
modules
Panel Bus (via
RS485-1)
BACnet MS/TP
(via RS485-2)
A) 9x 821A, 9x 822A, 9x 823A, 9x 824, 5x 825, 5x 830A
B) Four (4) PX pages: AI, AO, BI, and BO points each in a dedicated PX page per point type
C) About 0.5% of the BACnet MS/TP point updates are occasionally delayed.
D) One (1) PX page with all points
E) COV: Change of Value. COV frequency is the rate of change in the value of an object property.
BACnet MS/TP at
38,500 bps
No. of Points
hardware in PX
I/O points pages
46 491 491
A)
13 559 559
Max. no. of COV updates per min.
COV E)
across RS485-1 and RS485-2
frequency
together
4 sec
CIPer
Freq. of
Histories
value
enabled
changes
2 sec
--
B)
(poll rate)
2 sec
500
D)
(COV) E)
4,000
23
MODEL 50 CONTROLLER – USER GUIDE
TM
CPU usage Test result
OK for non-
30%
critical
(occasionally:
applications
50%)
C)
CPU usage
25...35%
(occasionally:
60%)
test result
OK
31-00198-03