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Reference Manual
00809-0200-4708, Rev AA
Smart Wireless Gateway for SteamLogic OPC Server
January 2014
Smart Wireless Gateway for SteamLogic OPC Server
Note:
OPC Item's Timestamp is read from SteamLogic's State Change Timestamp.
The above Trap Status, Monitor Status, and State Change Timestamp icons and values are based
on the SteamLogic version 1.1.0 and SteamLogic Database version 5.
The OPC TrapState item's data type is byte “VT_I1” in an OPC client.
1.3 Network architecture
This section describes the network architecture used to establish OPC communications
between the SteamLogic software and the host system. This communication path will allow the
calculated trap state, a timestamp, and quality to be monitored by an OPC client. All other
parameters, including PV, SV, TV, and QV, are available through the Gateway protocol interfaces
(Modbus, OPC, Ethernet/IP, HART-IP).
The following network architecture diagrams will help when integrating data from SteamLogic
into the host system.
An OPC server (proxy) is provided by Rosemount as part of the SteamLogic software installation
package. The Host System will need OPC client capabilities that are used to establish
communications with the SteamLogic OPC Server.
As shown in the architecture drawing the Gateway transmits the device data via the HART-IP
protocol to the SteamLogic polling service. The steam trap status is then calculated within the
SteamLogic polling service and stored in the SteamLogic database. Using the SteamLogic OPC
server the trap state can be accessed via the OPC client within the host system.