Beckhoff KL2791 Series, Documentation

Page: 33 / 41

Access from the user program
KL2791 33 Version: 2.0.0
Key
Bit Name Description
SB.7 RegAccess 0
bin
Acknowledgment for process data mode
SB.6 Error 1
bin
A load-side short circuit was detected
SB.5 Temperature warning 1
bin
Overtemperature detected (> 80°C): The process data
are limited to 20% (the limitation is automatically reset
when the temperatures falls below 60°C)
SB.4 Overload 1
bin
Overload detected (e.g. when switching higher loads
on)
SB.3 to SB.1 Operation mode 0
dec
Full-wave control
1
dec
Mixed control
SB.0 Synchronous 0
bin
Terminal is not synchronized with the mains or a short
circuit was detected on the load side
1
bin
Terminal has synchronized itself with the mains*
Register communication
Control byte (for register communication)
The control byte (CB) is located in the output image [
}
32] , 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 R/W Reg. no.
Key
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 the number of the
register [
}
34] that you
- want to read with input data word DataIn [
}
32] or
- want to write with output data word DataOUT [
}
32] .
Status byte (for register communication)
The status byte (SB) is located in the input image [ } 32] , and is transmitted from terminal to the controller.
Bit SB.7 SB.6 SB.5 SB.4 SB.3 SB.2 SB.1 SB.0
Name RegAccess R/W Reg. no.
Key
Bit Name Description
SB.7 RegAccess 1
bin
Acknowledgment for register access
SB.6 R 0
bin
Read access
SB.5 to SB.0 Reg. no. Number of the register that was read or written.