A-3.10 Example Of Predicted Sweep Time Calculation - GE PACSystems RX7i Reference Manual

A-3.10 Example of Predicted Sweep Time Calculation
The sweep time estimate in this example does not include a time for logic execution. The calculated
sweep is for normal sweep time with point faults disabled, and the programmer is not attached. The
times used in the calculation are extracted from the following tables:
Base Sweep Times
RX7i Module Sweep Impact Times or RX3i I/O Module Sweep Impact Times
Sweep Impact Time of Genius I/O and GBCs.
A sample calculation of predicted sweep times is provided after the example.
Sample RX7i System Configuration
PS CPE010
0 1
Sweep Calculations (in µS)
Predicted Sweep =
Base Sweep Time
I/O Scan Impact ...
Number of discrete input type 2 modules—main rack
Sweep impact time per discrete I/O module
Number of discrete output type 2 modules—main rack
Sweep impact time per discrete I/O module
Number of analog input modules—main rack
Sweep impact time per analog base and output module
Number of analog output modules—main rack
Sweep impact time per analog base and output module
Ethernet Module
GFK-2222AD
BTM 32PT 32PT
Input Input
2 3 4
MAIN RACK
+
Base Sweep
I/O Scan Impact
April 2018
Appendix A. Performance Data
32PT 32PT 8CHN
Output Output Analog
Input
5 6
Predicted Sweep Time
4CHN ETM
Analog
Output
7 8 9
= 465
2
x 37.9 = 75.8
2
x 80.4
= 80.4
1
x 49.3 = 49.3
1
x 49.7 = 49.7
1 x 55.0 = 55.0
= 775.2
301