BECKHOFF KL3681 - Manual (Page 28)

Access from the user programm
5 Access from the user programm
5.1 Process image
Complex mapping
The following 9 bytes are transferred bi­directionally between KL3681 and control:
Byte offset (with­
out word align­
ment*) Byte offset (with
word alignment*) Format Input data Output data
0 0 Byte Status byte (SB
[
} 29])
Control byte (CB
[
} 28])
1 2 Word DataIN0 DataOUT0
3 4 Word DataIN1 DataOUT1
5 6 Word DataIN2 DataOUT2
7 8 Word DataIN3 DataOUT3
*) Word alignment: The Bus Coupler places values on even byte addresses
Compact mapping (from firmware version 1C)
The following 8 bytes are transferred bi­directionally between KL3681 and control:
Byte offset (with and
without word align­
ment*) Format Input data Output data
0 Word DataIN0 DataOUT0
2 Word DataIN1 DataOUT1
4 Word DataIN2 DataOUT2
6 Word DataIN3 DataOUT3
*) word alignment has no effect with compact mapping
5.2 Control and status byte
Process data mode
Control byte (in process data mode)
The control byte (CB) is located in the output image [ } 28] and is transmitted from the controller to the
terminal.
Bit CB.7 CB.6 CB.5 CB.4 CB.3 CB.2 CB.1 CB.0
Name RegAccess StartCalibration StartCalibration disAutorange Voltage/Current DC/AC Range
KL3681, KS3681 28 Version 2.0.0