A-4 User Memory Allocation; A-5 Items That Count Against User Memory - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK
Timed Interrupt Performance and Sweep Impact Times for a 0.001s Timed
Interrupt Block
Sweep Impact Item
Timed interrupt sweep impact
Minimum interrupt period
Average interrupt period
Maximum interrupt period

A-4 User Memory Allocation

User Memory Size is the number of bytes of memory available to the user for PLC applications.
Model
IC695CPE302
IC695CPE305
IC695CPU310, IC695CPE310, IC698CPE010, IC698CPE020, IC698CRE020
IC695CPU315
IC695CPL410, IC695CPE400, IC695CPE330,
IC695CPU320, IC695CRU320
IC698CPE030, IC698CRE030
IC698CPE040, IC698CRE040
EPSCPE100
EPSCPE115
For a list of items that count against user memory, see below.

A-5 Items that Count Against User Memory

The following items count against the CPU memory and can be used to estimate the
minimum amount of memory required for an application. Additional space may be
required for items such as Advanced User Parameters, zipped source files, user heap, and
published symbols.
Register Memory Size (%R)
Serial I/O, SNP & RTU Protocols
CPU310 CPU315
(µs) CPU320
(µs)
87.3 26.2
908.3 969.8
1000.0 1000.0
1081.2 1030.8
Bytes = %R references configured  2
CPE010 CPE020
(µs) (µs)
88.6 28.0
951.4 946.0
1005.5 999.7
1056.6 1054.0
User Memory Size (MB)
Appendix A
October 2019
CPE030 CPE040
(µs) (µs)
31.2 23.3
922.8 973.0
1000.0 999.9
1077.0 1026.9
2MB
5MB
10MB
20MB
64MB
64MB
1MB
1.5MB
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