L-INX User Manual
261
LOYTEC
Version 4.0
LOYTEC electronics GmbH
pin on the LINX-110 device. Note that this connection method requires an installed
LOYTEC network interface.
Figure 208: Connect via CEA-709
Important:
To be able to communicate with the LINX-110 device via CEA709 the LINX-110 must be
commissioned.
RS232:
To connect via RS232 select LOYTEC RS232 as Driver and LOYTEC as transmission
protocol. All other values are set correctly per default.
12.4.3 Usage of NVs, Technology Converters
To used CEA-709 variables the content of the NVs must be converted to IEC61131
compliant data types. Look for ―Elementary and Generic Data Types‖ within the logiCAD
online help to get information about the available data types. Technology Converters are
used to perform the transformation from CEA-709 data types to IEC61131 data types. All
Technology Converters are summarized in the subfolder CEA709_Conv located in the
StandardLibs folder.
Depending on the type of the NV there are three different ways to use the NV within
IEC61131 programs:
Simple NVs that hold only one scalar value, e.g. SNVT_amp:
Those kinds on NVs are represented as IEC61131 REAL values within logiCAD.
There is no additional conversion necessary. Figure 216 shows an example
program for scalar data types.
Simple NVs based on an enumeration, e.g. SNVT_date_day:
The active identifier of the enumeration is represented as Boolean value. When
using NVs based on enumerations, Enumeration Converters are used to identify the
current state. There are two kinds of Enumeration Converters. First, the
Enumeration Converters that convert the enumeration types to Boolean types,
grouped in the folder Convert from CEA709_Enums. Second, the Enumeration
Converters that converts several Boolean inputs to an enumeration type, grouped in
the folder Convert to CEA709_Enums.
Structured NVs that consists of a number of fields, e.g. SNVT_switch:
