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 | Para | Para | Para | ASiSN | ASiIn | ASiIn | ASiIn | ASiIn | ASiIn |
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 | Para | Para | Para | ASiCN | ASiOut | ASiOut | ASiOut | ASiOut | ASiOut |
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)