Beckhoff TF6120, Manual

Page: 33 / 76

Configuration
TF6120 33 Version: 1.1
Conversion-Parameters
Type Req./Opt. Description
ConversionID Req unique ID-number which identifies
this conversion
ConversionDesc Optional
ConversionType Req 0 : NoConversion
1 : LinearConversion
Clamping Optional 0 : No clamping 1 : Clamp on EU
2 : Clamp as specifiedIf clamping is
active, the data value will be limited
to its High clamp/EU value, when it
exceeds the upper limit, and
similarly with Low clamp
parameter.
HighClamp Optional, depends on
<ConversionType>/<Clamping> 1.0 (Default)
LowClamp Optional, depends on
<ConversionType>/<Clamping> 0.0 (Default)
HighEU Optional, depends on
<ConversionType>/<Clamping> engineering unit (client scale) 1.0
(Default)
LowEU Optional, depends on
<ConversionType>/<Clamping> engineering unit (client scale) 0.0
(Default)
HighIR Optional, depends on
<ConversionType>/<Clamping> instrument range (device scale)
10000 (Default)
LowIR Optional, depends on
<ConversionType>/<Clamping> instrument range (device scale) 0
(Default)
4.1.3 Data Access
4.1.3.1 Overview
An OPC server represents a standardised interface for the management of process data. The process data
available in the TwinCAT system must therefore be known to the OPC server, or must be made known to it
at the time of configuration. To represent this "hierarchical process space" clearly, the "Devices" are
subdivided into subsidiary items. The OPC client can browse through this representation and use it for the
server's actual configuration. The TwinCAT OPC server supports the optional browser OPC interface.
Please note: This hierarchical display is not to be confused with the configuration of the OPC server that
exists at run-time. The run-time configuration of the OPC server, i.e. the creation of groups, specification of
the refresh time, the insertion of tags etc. is performed dynamically by the OPC client.
Configuration TwinCAT OPC Server
• Receiving data from the TwinCAT PLC [
}
33] : Configuration by variable import from TwinCAT PLC
control
• Receiving Data from the TwinCAT I/O task [ } 38] : Configuration by variable upload from the TwinCAT
I/O Task
4.1.3.2 Receiving data from TwinCAT PLC
As mentioned bfore, the OPC-Server gives the possibility to read/write process values from ADS devices and
therefore also from the TwinCAT PLC.