Profinet Io Performance Examples - GE IC695PNC001 User Manual

Appendix

PROFINET IO Performance Examples

A
Note: The configurations and performance numbers shown here are examples; Actual
performance timings will vary depending on your exact configuration and network setup.
This section presents various PROFINET IO systems and their measured I/O performance for a
simple 16 point Discrete I/O Loopback. As these systems are not identical in their configuration or
setup, additional details of each system configuration are in a section following the table below.
The I/O Loopback measurements were done by wiring the outputs of a discrete output module
directly to the inputs of a discrete input module, and using Ladder Logic to measure the time
difference between setting the outputs and reading the same data on the corresponding inputs.
Proficy Machine Edition was attached to the RX3i during testing. The average, minimum, and
maximum loopback times were captured from a 4 hour sample period. In addition, since the CPU
sweep time is a primary factor in the accuracy and precision of the I/O Loopback times recorded, the
average and maximum CPU sweep times for each system are given.
Note: CPU Sweep time variations between systems are not completely a function of varying
PROFINET IO. It was also influenced by variations in logic executed and main rack
configurations.
System Configuration
1ms PROFINET Update Rate
A.1 – Single Device
A.2 – Multi-Device
A.2.1 – Multi-Device w/MRP
A.3 – Multi-PNC Multi-Device
16ms PROFINET Update Rate
B.1 – Multi-Device
B.1.1 – Multi-Device w/MRP
B.2 – Max Device
* Number of modules only includes I/O modules; does not include head-ends or power-supplies.
GFK-2571A
Total # Total Amount
PROFINET PROFINET I/O
IO
Discrete pts./
Devices/
Analog Chan.
Modules*
1/4 192/0
8/14 824/0
8/14 824/0
32/41 2808/85
20/29 1928/0
20/29 1928/0
64/89 5176/445
RX3i CPU 16 pt. Discrete
Sweep Time I/O Loopback
(msec.) Time (msec.)
Average Average
(Max) (Min, Max)
3.2 (5.8) 8 (5, 13)
4.0 (6.4) 7 (4, 12)
4.0 (6.6) 7 (4, 12)
7.2 (9.6) 14 (6, 17)
5.2 (8.2) 22 (5, 42)
5.2 (7.7) 23 (5, 43)
12.3 (15.4) 36 (11, 60)
A-1