12-byte process image Process image

If only AS-i slave addresses lower than 12 are used, the 12-byte process image is sufficient. This selection saves bandwidth both on the fieldbus and on the K-bus. Since the 12 bytes for AS-i terminal can be transferred in one K-Bus cycle, this selection also provides optimum speed for the update rate of the other terminals. This setting is enabled in delivery state of the KL6201/KL6211.

Input data (KL6201/KL6211 -> 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	Para In0	Para In1	Para In2	Para In3	ASiSN + ASiIn Slave 1	ASiIn Slaves 2+3	ASiIn Slaves 4+5	ASiIn Slaves 6+7	ASiIn Slaves 8+9	ASiIn Slaves 10+11

Output data (PLC -> KL6201/KL6211)

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	Para Out0	Para Out1	Para Out2	Para Out3	ASiCN + ASiOut Slave 1	ASiOut Slaves 2+3	ASiOut Slaves 4+5	ASiOut Slaves 6+7	ASiOut Slave 8+9	ASiOut Slaves 10+11

Key

CB n: control byte n
SB n: status byte n
Para In n: Input parameter, byte n
Para Out n: Output parameter, byte n
ASiSN: AS-i status nibble
ASiCN: AS-i command nibble
ASiIn slave x+y: Input data of the AS-i slaves x and y (one nibble per slave)
ASiOut slave x+y: Output data of the AS-i slaves x and y (one nibble per slave)