Emerson PACSystems RX3i - Page 213

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Appendix A
GFK-2222AK October 2019
Serial I/O, SNP & RTU Protocols 205
Worksheet A: I/O Module Sweep Time
The following form can be used for computing I/O module sweep impact. The calculation
contains times for analog input expanders that are either grouped into the same scan
segment as the preceding module or are grouped in a separate new scan segment. The
sweep impact times of I/O Modules can be found at RX3i I/O Module Sweep Impact Times.
Number of expansion racks
Sweep impact per expansion rack
______
x ______
= ______
Number of discrete I/O modules—main rack
Sweep impact per discrete I/O module—main rack
______
x ______
= ______
Number of discrete I/O modules—expansion rack
Sweep impact per discrete I/O module—expansion rack
______
x ______
= ______
Number of analog input base and output modules—main rack
Sweep impact per analog input base and output module—main rack
______
x ______
= ______
Number of analog input expander modules (same segment)—main rack
Sweep impact per analog input expander module (same segment)—main
rack
______
x ______
= ______
Number of analog input expander modules (new segment)—main rack
Sweep impact per analog input expander module (new segment)—main rack
______
x ______
= ______
Number of analog input base and output modules—expansion rack
Sweep impact per analog input base and output module—expansion rack
______
x ______
= ______
Number of analog input base and output modules (same segment)—exp. rack
Sweep impact per analog input base and output module (same seg.)—exp.
rack
______
x ______
= ______
Number of analog input base and output modules (new segment)—exp. rack
Sweep impact per analog input base and output module (new seg.)—exp.
rack
______
x ______
= ______
Predicted I/O Module Sweep Impact
______
Note: If point faults are enabled, substitute the corresponding times for point faults enabled.