BECKHOFF KL3681 - Manual (Page 10)

Product overview
Filter
The built­in filter averages the values for the last half second. If the measuring range is changed the filter is
reset. The filter is active by default. If the filter is switched off the terminal supplies approx. 16 measured
values per second.
Mains frequency
The integration times are adapted to the mains frequency (50, 60 Hz). The default is 50 Hz.
Presentation
The presentation of the values in the process data can be changed.
left aligned (0)
Left­justified presentation, full­scale value corresponds to 0x7FFFE000 (0x7FFFFFFF) or 0x80000000.
right aligned (1)
Right­aligned presentation: 18 bit resolution of the measuring range, end value corresponds to 0x0003FFFF
(262143
dec
) or 0xFFFC0000 (­262144
dec
).
In the extended measuring range these limits are exceeded!
scaled (2)
Scaled presentation: this presentation corresponds to 1 bit per µV / µA. Examples:
­ Mode 0, Autorange, 2.5 V: 2500000
dec
­ Mode 2, 800 mA: 800000
dec
float (5)
Scaled presentation in floating­point format
Scaled presentation (2) is set as default.
Note
Please note
• Only in scaled presentation the factors 0.1/1/10/100 are taken into account between the
measuring ranges.
• In left aligned presentation the extended measuring range is not available.
Zero Compenzation Interval
The compensation function compensates the internal offset drift of the ADC. The interval length is selectable.
If setting 4 "Triggered by PDO" is used, the time for reading the internal offset can be selected manually via
the "Start Calibration" process data bit.
Note
50 Hz mode
In 50 Hz mode this function should not be used (0: off).
Calibration
The terminal features manufacturer and user calibration options, which can be switched on and off
independently. The calibration always applies to all measuring ranges. Adaptation in 60 Hz mode and
compensation of the AC system offset cannot be switched off.
KL3681, KS3681 10 Version 2.0.0