Beckhoff KL2819, Documentation

Page: 31 / 42

Access from the user programm
KL2819 31 Version: 1.1.0
6 Access from the user programm
6.1 Control and status bytes
6.1.1 Process data mode
Control byte (for process data mode)
The control byte (CB) is located in the output image, and is transmitted from the controller to the terminal.
Bit Name Description
CB.7 RegAccess 0
bin
: Register communication off (process data mode)
CB.6 - reserved
CB.5 - reserved
CB.4 - reserved
CB.3 - reserved
CB.2 - reserved
CB.1 - reserved
CB.0 - reserved
Status byte (in process data mode)
The status byte (SB) is located in the input image and is transmitted from terminal to the controller.
Bit Name Beschreibung
SB.7 RA R eg A ccess Register access (0 = process data mode enabled)
SB.6 DCF D iagnostic C ommon F ault A diagnostic common fault (OR Combination of all Faults)
SB.5 MV M issing V oltage No Voltage for the Outputs (Up < 10 V)
SB.4 UV U nder V oltage Low Voltage for the Outputs (Up < 17 V)
SB.3 OTD O ver t emperature D evice Temperature of the terminal too high
SB.2 r - reserved
SB.1 r - reserved
SB.0 r - reserved
6.1.2 Register communication
Control byte (for register communication)
The control byte (CB) is located in the output image, and is transmitted from the controller to the terminal.
Bit Name Description
CB.7 RegAccess 1
bin
: Register communication switched on
CB.6 R/W 0
bin
: Read access
1
bin
: Write access
CB.5 to
CB.0 Reg. no. Register number:
Enter here the number of the register that you wish
- to read with input data word DataIN, or
- to write with output data word DataOUT.