Emerson 00809-0200-4708 User Manual
Reference Manual
00809-0200-4708, Rev AA
January 2014
SteamLogic OPC Server
Table of contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
OPC mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1
Network architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
Supported operating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
Supported OPC versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
OPC server configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4
1.1 Introduction
The Smart Wireless Gateway enables IEC62591 WirelessHART technology; wireless transmitters
communicating with each other and the Gateway in a self-organizing wireless mesh network. The
Gateway manages the network, its communication, security and connectivity. The gateway is the
entry point for wireless device data that is then converted to a format that is compatible with other
systems. In the case of steam trap monitoring this other system is SteamLogic, monitoring software.
This document focuses on OPC system integration for the SteamLogic software and the Rosemount
708 Wireless Discrete Transmitter.
The objective of the SteamLogic OPC Server is to give access to the trap state that is calculated
within the SteamLogic software.
1.2 OPC mapping
The following table translates the OPC value, seen by the client, to a steam trap state and user
interface icon.
OPC
value
0 Good Steam trap is functioning normally under the current settings
1 Cold
State
User interface
icon
Meaning
Steam trap is in a failed cold position. This steam trap may have a mechanical
failure or could be plugged with solids. It could also be flooding or
undersized for the application making it unable to remove enough
condensate. Otherwise the steam supply could be turned off.
Smart Wireless Gateway for SteamLogic OPC Server
January 2014
Reference Manual
00809-0200-4708, Rev AA
OPC
value
2 Noisy Transition state before going to fully blowthru
3 Blow Thru
State
User interface
icon
Meaning
Steam trap has failed in the open position. It may have a mechanical failure
causing it to stick open or could be installed improperly.
There are three reasons for this status;
1. The device has recently been configured and the state has not
been determined yet
4
No Data
Available
2. The gateway has lost communication with the device so the
state cannot be confirmed
3. The device has a fault/error causing the state to be
undeterminable
5
Device Not
Configured
The device has been discovered, but has not been configured with the
required settings. Edit the trap details to configure the device.
Use the out of service feature in the device edit tab when a steam trap has a
6 Out of Service
scheduled period of down time to eliminate presenting the trap as cold. Out
of Service overrides all other trap states.
Note:
OPC Item's Quality is read from the SteamLogic's Monitor Status:
User
OPC
value
Good Good The device is operating normally and reporting live information
Bad Bad Device malfunction. Use AMS, 475 handheld, or other HART tool to troubleshoot
State
interface
icon
Meaning
2
Smart Wireless Gateway for SteamLogic OPC Server
Reference Manual
00809-0200-4708, Rev AA
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.
Smart Wireless Gateway for SteamLogic OPC Server
January 2014
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.
Smart Wireless Gateway for SteamLogic OPC Server
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