System capacities

Capacity limits for CHARMs Smart Logic Solver SIS systems

Table: CHARMs Smart Logic Solver (CSLS) systems
CSLS SIS capacities Limits

CHARMs Smart Logic Solvers per SIS Controller (SZ)

16

Function blocks per SIS module

500(1)

User-defined parameters per SIS module

230

SIS modules in a CSLS

16

Boolean Secure parameters in a CSLS

96

Non-Boolean Secure parameters in a CSLS

32

Non-secure parameter references in a CSLS

96

LS CHARMs per CSLS (arranged as 8 carriers of 12 CHARMs per carrier)

96

Note

Only 48 of the 96 LS CHARM slots can be configured as output LS CHARMs. LS DVC HART DTA CHARMs are included in the output CHARMs count. This can be any combination of simplex and redundant as long as the slot count of output LS CHARMs does not exceed 48. This limit is not enforced during configuration, only during download. The remaining 48 slots can be configured as input LS CHARMs.

CHARM Carriers per CSLS

8

SIS Controller Modbus communications

4000 mapped values

Table: Global Safety Network capacities
CSLS Global Safety Network property Limit

LSNB nodes per LSN

1

Domain publishers per domain

16

Publishers per LSNB (either type - there can be a mix of domain publishers and system publishers)

4

System publishers per DeltaV system

8

Listener LSNBs per domain

No limit

Boolean Secure parameters per publisher

192

Non-Boolean Secure parameters per publisher

64

Boolean Secure parameters received from the LSN per LSNB

768

Non-Boolean Secure parameters received from the LSN per LSNB

256

Boolean Secure parameters an LSNB can receive from the GSN

3072

Non-Boolean Secure parameters an LSNB can receive from the GSN

1024

GSN Domains per system 16

Table: Local Safety Network Gateway capacities
Local Safety Network Gateway property Limit

LSNGs per local safety network

4 (3 if the LSN contains an LSNB)

Publishers per LSNG

4

Publishers per LSN

8

Boolean Secure parameters per publisher

192

Boolean Secure parameters per LSNG

768

Modbus devices per LSNG

2

Table: Capacities common to both SIS systems
Common SIS capacities Limits

Temporary variables defined using VAR…END_VAR per expression

32

Function blocks in the top level of an SIS module

127(1)

Function blocks per composite

127(1)

(1) The actual value may be less depending on a number of factors including: the complexity of SIS module configuration and the number and type of SIS function blocks used.