Process image

The process image of the KL6224 consists of a 6-byte parameter data block and a 6-, 8-, 18-, 30- or 42-byte process data block.
The result is a 12-, 14-, 24-, 36- or 48-byte process image.

The size of the process image can be set via the KS2000 configuration software, or fieldbus-specific via the Bus Coupler. It is stored in register R27 of the KL6224.
After changing the process image the Bus Coupler must be restarted for the modified process image to take effect.

Please refer to chapter Firmeware version of the Bus Couplers to find out which process images your Bus Coupler supports.

Description of the process images

	Selection of the process image The process image should not be larger than necessary for operating your IO-Link devices! This saves bandwidth for the higher-level fieldbus and the K-bus. Since only 12 bytes can be transferred to the KL6224 in a K-bus cycle, the update rate of the other terminals is also optimally fast with minimal selection.

12-byte process image

The 12-byte process image consists of a 6-byte parameter data block and a 6-byte process data block.

Output data (PLC -> KL6224)

Parameter data block (6 bytes)						Process data block (6 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
CB0	CB1	ParaOut0	ParaOut1	ParaOut2	ParaOut3	DataOut0	DataOut1	DataOut2	DataOut3	DataOut4	DataOut5

Input data (KL6224 -> PLC)

Parameter data block (6 bytes)						Process data block (6 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
SB0	SB1	ParaIn0	ParaIn1	ParaIn2	ParaIn3	StatusCh1	StatusCh2	StatusCh3	StatusCh4	DataIn0	DataIn1

Key

CB n: Control byte n of the KL6224
SB n: Status byte n of the KL6224
Para Out n: Output parameter, byte n
Para In n: Input parameter, byte n
StatusCH n: Status information of IO-Link device n
DataOut n: Output data byte n
DataIn n: Input data byte n

12-byte process image, compressed mode

In compressed mode the data are compacted in order to save space (e.g. for CANopen Bus Coupler). It can be activated via the parameter Master Control (register R41 on register page 4).
If compressed mode is active, it applies to all IO-Link ports.

The compressed mode is also available for the larger process images (14, 24, 36 and 48 bytes).
For the larger process images the structure of the mixed data block is exactly as shown here, and the process data block then includes the further data bytes from DataOut2/DataIn2.

Output data (PLC -> KL6224)

Mixed data block (6 bytes)						Process data block (6 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
CB0	CB1	ParaOut0	ParaOut1	ParaOut2¹ or DataOut²	ParaOut3¹ or DataOut²	DataOut2	DataOut3	DataOut4	DataOut5	DataOut6	DataOut7

Input data (KL6224 -> PLC)

Mixed data block (6 bytes)						Process data block (6 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
SB0¹or StatusCh1/2²	SB1¹or StatusCh3/4²	ParaIn0	ParaIn1	ParaIn3¹ or DataIn0²	ParaIn4¹ or DataIn1²	DataIn2	DataIn3	DataIn4	DataIn5	DataIn6	DataIn7

¹) for register communication (see chapter Control and status byte)²) for process data mode

Key

CB n: Control byte n of the KL6224
SB n: Status byte n of the KL6224
Para Out n: Output parameter, byte n
Para In n: Input parameter, byte n
StatusCh1/2: Status information of IO-Link device n (4-bit low = port 1 / 4-bit high = port 2)
StatusCh3/4: Status information of IO-Link device n (4-bit low = port 3 / 4-bit high = port 4)
DataOut n: Output data byte n
DataIn n: Input data byte n

14-byte process image

The 14-byte process image consists of a 6-byte parameter data block and an 8-byte process data block.

Output data (PLC -> KL6224)

Parameter data block (6 bytes)						Process data block (8 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11	Byte 12	Byte 13
CB0	CB1	ParaOut0	ParaOut1	ParaOut2	ParaOut3	DataOut0	DataOut1	DataOut2	DataOut3	DataOut4	DataOut5	DataOut6	DataOut7

Input data (KL6224 -> PLC)

Parameter data block (6 bytes)						Process data block (8 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11	Byte 12	Byte 13
SB0	SB1	ParaIn0	ParaIn1	ParaIn2	ParaIn3	StatusCh1	StatusCh2	StatusCh3	StatusCh4	DataIn0	DataIn1	DataIn2	DataIn3

Key

See 12-byte process image.

24-byte process image (default)

The 24-byte process image consists of a 6-byte parameter data block and an 18-byte process data block. This setting is enabled in the delivery state of the KL6224.

Output data (PLC -> KL6224)

Parameter data block (6 bytes)						Process data block (18 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
CB0	CB1	ParaOut0	ParaOut1	ParaOut2	ParaOut3	DataOut0	DataOut1	DataOut2	DataOut3	DataOut4	DataOut5

Process data block (18 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	Byte 22	Byte 23
DataOut6	DataOut7	DataOut8	DataOut9	DataOut10	DataOut11	DataOut12	DataOut13	DataOut14	DataOut15	DataOut16	DataOut17

Input data (KL6224 -> PLC)

Parameter data block (6 bytes)						Process data block (18 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
SB0	SB1	ParaIn0	ParaIn1	ParaIn2	ParaIn3	StatusCh1	StatusCh2	StatusCh3	StatusCh4	DataIn0	DataIn1

Process data block (18 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	Byte 22	Byte 23
DataIn2	DataIn3	DataIn4	DataIn5	DataIn6	DataIn7	DataIn8	DataIn9	DataIn10	DataIn11	DataIn12	DataIn13

Key

See 12-byte process image.

36-byte process image

The 36-byte process image consists of a 6-byte parameter data block and a 30-byte process data block.

Output data (PLC -> KL6224)

Parameter data block (6 bytes)						Process data block (30 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
CB0	CB1	ParaOut0	ParaOut1	ParaOut2	ParaOut3	DataOut0	DataOut1	DataOut2	DataOut3	DataOut4	DataOut25

Process data block (30 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	...	Byte 35
DataOut6	DataOut7	DataOut8	DataOut9	DataOut10	DataOut11	DataOut12	DataOut13	DataOut14	DataOut15	...	DataOut29

Input data (KL6224 -> PLC)

Parameter data block (6 bytes)						Process data block (30 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
SB0	SB1	ParaIn0	ParaIn1	ParaIn2	ParaIn3	StatusCh1	StatusCh2	StatusCh3	StatusCh4	DataIn0	DataIn1

Process data block (30 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	...	Byte 35
DataIn2	DataIn3	DataIn4	DataIn5	DataIn6	DataIn7	DataIn8	DataIn9	DataIn10	DataIn11	...	DataIn13

Key

See 12-byte process image.

48-byte process image

The 48-byte process image consists of a 6-byte parameter data block and a 42-byte process data block.

Output data (PLC -> KL6224)

Parameter data block (6 bytes)						Process data block (42 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
CB0	CB1	ParaOut0	ParaOut1	ParaOut2	ParaOut3	DataOut0	DataOut1	DataOut2	DataOut3	DataOut4	DataOut25

Process data block (42 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	...	Byte 48
DataOut6	DataOut7	DataOut8	DataOut9	DataOut10	DataOut11	DataOut12	DataOut13	DataOut14	DataOut15	...	DataOut41

Input data (KL6224 -> PLC)

Parameter data block (6 bytes)						Process data block (42 bytes)
Byte 0	Byte 1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8	Byte 9	Byte 10	Byte 11
SB0	SB1	ParaIn0	ParaIn1	ParaIn2	ParaIn3	StatusCh1	StatusCh2	StatusCh3	StatusCh4	DataIn0	DataIn1

Process data block (42 bytes, continuation)
Byte 12	Byte 13	Byte 14	Byte 15	Byte 16	Byte 17	Byte 18	Byte 19	Byte 20	Byte 21	...	Byte 48
DataIn2	DataIn3	DataIn4	DataIn5	DataIn6	DataIn7	DataIn8	DataIn9	DataIn10	DataIn11	...	DataIn37

Key

See 12-byte process image.