BECKHOFF KL6811: Access from the User Program

Process Image

In the process image, the KL6811 is represented with 3 bytes of input and output data. These are organized as follows:

Byte offset (without word alignment*) Byte offset (with word alignment*) Format Input data Output data
0 0 Byte Status byte (SB) Control byte (CB)
1 2 Word DataIN DataOUT

*) Word alignment: The Bus Coupler places values on even byte addresses

Process data words in DALI mode

Process output word (DataOUT)

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name Y Address bits (A) S Command (X)
Key
Bit Name Description
15 Y 0bin Address bits 9 to 14 contain a DALI short address.
1bin Address bits 9 to 14 contain a DALI group address or a DALI collective call.
14 to 9 Address bits (A) 0bin DALI short address, DALI group address or DALI collective call
8 Selection bit (S) 0bin Bits 0 to 7 contain a light value.
1bin Bits 0 to 7 contain a DALI command.
7 to 0 Command (X) Light value or DALI command*

*) A list of DALI commands can be found in Chapter DALI commands.

Process Image 1:
Note
Command receiving by the DALI slaves
Please note that DALI slaves can only receive commands once their load side is supplied with power (230 V), since the PIC (single-chip micro-controller) of a DALI slave is typically supplied via the load voltage.

Process input word (DataIN)

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name reserved OK Parameters
Key
Bit Name Description
15 to 9 - reserved
8 OK 0bin Bits 0 to 7 do not contain valid data
1bin Bits 0 to 7 contain the valid response of a DALI slave
7 to 0 Parameters Response of a DALI slave

Process data words in DSI mode

Process output word (DataOUT)

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name reserved DSI dimming value
Key
Bit Name Description
15 to 8 - reserved
7 to 0 DSI dimming value Here you can specify the 8-bit dimming value for all DSI slaves.

Process input word (DataIN)

In DSI mode, the process input word has no function.

Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name reserved