Fig. 139 Selection Dialog Predefined Pdo - Beckhoff EL3692 Documentation

full-scale value". In Autorange mode the measuring range is exceeded by up to 10%, in order to ensure
the measuring range changeover. Note the status information.
The following example is for the measuring range 1 .. 10 Ω:
Input resistance
0 Ω
10 Ω
> 11 Ω
Please note that that the relative measuring error is very large near the lower end of the measuring range.
For measurements within the range of less than 10% of the lower end of the measuring range the next lower
measuring range should be used. The AutoRange function works accordingly.
• as 32-bit fixed-point float-value with mantissa and exponent, measuring range-independent "float"
Explanation:
This 32-bit variable can be linked directly with a FLOAT variable of the PLC according to IEC61131.
The conversion takes place in the EL3692; no measuring range-dependent conversion by the user is
required.
Predefined PDO Assignment
To simplify the configuration typical configurations based on process data are stored in the EtherCAT XML
Device Description. The predefined configurations can be selected in the process data overview. The
function is therefore only available if the XML files on the system are current (available for download from
the Beckhoff website). The following combinations are possible:
• 1st ch fixpoint only channel 1 measures, no REAL value
• 1st ch float only channel 1 measures, with REAL but no settings
• 1st ch fixpoint + float only channel 1 measures, REAL value and settings
• 2nd ch fixpoint both channels, no REAL value
• 2nd ch float both channels, with REAL but no settings
• 2nd ch fixpoint + float both channels, REAL value and settings (standard)
Fig. 139: Selection dialog predefined PDO
Selection CoE/PDO mode
The EL3692 requires an instruction as to whether it should work with or without Autorange
etc. This can be set via CoE or the process data (PDO). This distinction is therefore also
Note
made via the predefined PDO selection: If the control word is displayed as PDO, the
EL3692 primarily responds to the cyclic instructions from the control word. See also Expla-
nations.
SAI Inputs 0x1A00 (0x1A03)
This PDO contains the status data and the resistance of the terminal. The resistance value is issued as a 32-
bit value. The terminal status is shown as WORD.
EL3692
32-bit value, right-
aligned display
x00 00 00 00
x00 7F FF FF
x00 8C CC CB
Version: 2.1
Interpretation Status bits
0 Extended Range = 0
Overrange = 0
8.388.607 Extended Range = 1
Overrange = 0
9.227.467 Extended Range = 0
Overrange = 1
Commissioning
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