Process image
In the process image, the KL5151-0021 is represented with 5 bytes of input and output data. These are organized as follows:
Format | Input data | Output data |
|---|---|---|
Byte | ||
Double word | DataIN1 | DataOUT1 |
Byte | SB2 | CB2 |
Double word | DataIN2 | DataOUT2 |
Key
SB1: Status byte 1
CB1: Control byte 1
SB1: Status byte 2 (not used)
CB1: Control byte 2 (not used)
DataIN1: The current value of the 32-bit counter, or the one stored in the latch (the selection is made with bit CB1.1 of the control byte)
DataOUT1: Compare value for setting the comparator output (enabled by bit CB1.6 of the control byte).
DataIN2: 32-bit latch
DataOUT2: Compare value for resetting the comparator output
- The meaning of the control and status bytes is explained on the Control and Status bytes page.
 | No compact process image Operation of the KL5151-0021 with compact process image (without control and status bytes) is not possible, since the control and status bytes are required for useful process data operation of the terminal. Even if you adjust your Bus Coupler to the compact process image, the KL5151-0021 will still be represented with its complete process image! |