Communication in a CHARMs Smart Logic Solver SIS system

In a CSLS SIS system, communication occurs over the DeltaV Area Control Network and a Local Safety Network.

DeltaV Area Control Network

The DeltaV Area Control Network is an Ethernet network that enables communication between the nodes in a DeltaV network. SZ Controllers connect to the Area Control Network (as well as to the Local Safety Network) and isolate the CHARMs Smart Logic Solvers (CSLS) from the rest of the DeltaV system. Refer to the DeltaV™ S-series and CHARMs Hardware Installation manual for information on setting up the Area Control Network.

Local Safety Network

The Local Safety Network is a Ethernet network that enables communication between CSLSs and a single SZ Controller. The CSLSs communicate secure parameter and input data to other CSLSs over the Local Safety Network. The SZ Controller communicates configuration, parameter changes, and module data over the Local Safety Network to the CSLSs. SZ Controllers provide the DeltaV interface to multiple CSLSs on the same Local Safety Network. All CSLSs under one SZ Controller share the same Local Safety Network.

Important

The Local Safety Network must be treated as a dedicated standalone Local Area Network (LAN) and must not be connected to any other network including other DeltaV Local Safety Networks. Only DeltaV Safety Switches (LSN20 and SRM100) and DeltaV SIS nodes are supported on the Local Safety Network.

Global Safety Network

The Global Safety Network is an Ethernet network that enables communications between Local Safety Networks. Local Safety Network Bridges (LSNBs) connect to the Local Safety Network and to each other to create the Global Safety Network. LSNBs publish secure parameter data from CHARMs Smart Logic Solvers on the Local Safety Network to the Global Safety Network.