Westlock 3449 - WMS Server; Connectivity Server; System Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
5/05/12 TECH-461/D.W.O. 19909 Page 11 of 24
1.7.7 WMS Server
The WMS Server is the central software server on the TCP/IP network. It maintains the
wireless network, performs data logging, and publishes sensor information to clients and to the
plant monitoring and control systems (PLC, SCADA, etc.)
1.7.7.1 WMS Clients
 GUI Client: Provides a view of sensor data and network status and allows configuration
of remote sensors and alarms.
 Connectivity Client: Forwards Wireless Device data and status to the third party PLC,
DCS and SCADA. Supported protocols are Modbus RTU, Modbus TCP and OPC DA.
1.7.8 Connectivity Server
The Connectivity Server is a ruggedized computer that supplies real-time data to PLCs/HMIs
that reside on the plants dedicated network. The Connectivity Server gathers relevant data from
the WDs and transfers it via MODBUS RTU/TCP and/or OPC DA real time to PLCs/HMIs.
The Connectivity Server is seamlessly situated on the WVMS between the WMS and WGs and
extracts the requested device information from the data stream. From this position in the
WVMS the Connectivity Server also acts as a redundant network manager – keeping the
WVMS alive in case of WMS unavailability.
1.8 System Specifications
The following table provides general system specifications.
Function
Explanation
Wireless Communication
Two way Radio – IEEE 802.15.4 – at 2.4 GHz.
Communication Protocol
ZigBee Pro version.
Message Hops
Up to 15 hops from WD to WR to WR till it reaches a WG.
Main function
Angle measurement of valve stem position.
Update Rate
WD transmits its status immediately when valve moved more
than 1.50 degrees or every 15 minutes (configurable).
Latency
Less than 0.1 sec in average (assuming one hop)
Interface to Existing
Process Control Systems
The Connectivity Server is designed to deliver data collected
from the process line to any typical client or format commonly
used in the traditional process control systems. This starts with
OPC for the HMI / SCADA systems and down to the valve
status report fed directly to the PLC in using the popular
MODBUS protocol.
Operating Temperature
-40
0
C to 80
0
C (WD/WR)
-40
0
C to 70
0
C (WG)
WD/WR/WG sealing
Typically IP66 grade (WD depends on enclosure)