csmstr - Omega Engineering

OPC COMMUNICATION
CRIMSON USER MANUAL - MODULAR CONTROLLER
OPC AND SCADA
SCADA packages can access OPC data available in the operator interface using Red Lion
Controls software OPCWorx. This software is the OPC Server identified by the SCADA
package permitting access to the operator interface data tags. It can run either locally on the
SCADA PC, or, in multi-SCADA architecture, on a network server accessed by multiple PCs.
For information on OPCWorx configuration and functionality, please see OPCWorx manual
available on http://www.redlion.net/Support/Software/OPCWorx/Docs/OPCWorxrev1.pdf
OPC LINK (RED LION PRODUCTS DATA EXCHANGE)
Some Red Lion Controls’ products have the ability to exchange data using OPC. This facility
provides direct tag addressing, avoiding cumbersome mapping, and thus being a major
advantage over other traditional protocols such as Modbus TCP.
The communication architecture is client/server based. One server can share the data to
multiple clients (Maximum 4). The client can request and if authorized, change data in the
server.
PROGRAMMING A SERVER
The server interface is programmed as described in OPC server settings previously. The OPC
server just has to be activated so data can be shared. Any tags present in the server database
will be available for clients except Arrays and String tags.
PROGRAMMING A CLIENT
Access to the server tags is achieved via the OPC Master protocol available on the Ethernet
protocols in Communication. Once the driver is selected, a new device HMI1 is created.
The properties available on HMI1 are the server’s OPC and Ethernet settings. The IP Address
and TCP Port should match the server’s. The Browse button provides access to a dialog box
where the server database should be identified. Using this method, Crimson knows the tags
available in the server unit. The tag list is pulled from the server database so it can be
available when mapping new tags in the client.
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