This article identifies the configuration settings values available for instances of the 8500 Protocol (mbkrscan) scan tasks when they need to use OPC to acquire the data. See LOWIS Configuration for OPC Accessed Devices for context of these settings.
EPCAC
EPCAC is the designation for the tag generation for the older Matrikon ScadaCAC OPC Server style tag generation. The generated tag format looks like:
altaddress.Param:NN.Value;T
where
- altaddress is the base OPC tag associates with the device in LOWIS
- NN is the register number being requested
- T is the type code specifying the datatype (W for an unsigned short as an example)
SOFTTLBOX
SOFTTLBOX is used to identify the Software Toolbox OPC Server style of tag name generation. The generated tag format looks like:
altaddress.Param:NN.Value;T[;OV]
where
- altaddress is the base OPC tag associates with the device in LOWIS
- NN is the register number being requested
- T is the type code specifying the datatype (W for an unsigned short as an example)
- [;OV] is an optional argument that tells the OPC Server to ignore what it believes the datatype of the register should be and to use the datatype that was passed in with the tag instead. This override might be necessary because the Software Toolbox OPC Server has what it believes is the correct register map contained within it and it will reject requests for registers when the passed OPC tag does not match on the datatype specified.
Comments
2 comments
Hi team, what about MatrikonOPC?
EPCAC is the designation for the Matrikon OPC server for Scada CAC support. I am not sure why the designation for it is EPCAC, that designation was in use before I started working on the OPC support.
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