Alternative format
In the alternatives format, the KL1501 is mapped with 4/6 bytes of input data and 4/6 bytes of output data.
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: no  | 
                   0  | 
                   D0  | 
                   Cnt-CB/SB  | 
| 
                   1  | 
                   D2  | 
                   D1  | 
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: no  | 
                   0  | 
                   Cnt-CB/SB  | 
                   D0  | 
| 
                   1  | 
                   D1  | 
                   D2  | 
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: yes  | 
                   0  | 
                   Cnt-CB/SB  | 
                   CB/SB  | 
| 
                   1  | 
                   Res.  | 
                   D0  | |
| 
                   2  | 
                   D2  | 
                   D1  | 
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: yes  | 
                   0  | 
                   D0  | 
                   CB/SB  | 
| 
                   1  | 
                   Res.  | 
                   Cnt-CB/SB  | |
| 
                   2  | 
                   D1  | 
                   D2  | 
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: yes  | 
                   0  | 
                   Res.  | 
                   CB/SB  | 
| 
                   1  | 
                   D0  | 
                   Cnt-CB/SB  | |
| 
                   2  | 
                   Res.  | 
                   Res.  | |
| 
                   3  | 
                   D2  | 
                   D1  | 
| 
                   Requirements  | 
                   Word offset  | 
                   High byte  | 
                   Low byte  | 
|---|---|---|---|
| 
                   Complete evaluation: yes  | 
                   0  | 
                   Res.  | 
                   CB/SB  | 
| 
                   1  | 
                   Cnt-CB/SB  | 
                   D0  | |
| 
                   2  | 
                   Res.  | 
                   Res.  | |
| 
                   3  | 
                   D1  | 
                   D2  | 
Legend
| 
                   Complete evaluation:  | 
                   The terminal is mapped with control and status byte.  | 
| 
                   Motorola format  | 
                   Motorola or Intel format can be set.  | 
| 
                   Word alignment  | 
                   The terminal is positioned on a word boundary in the Bus Coupler.  | 
| 
                   CB  | 
                   Control byte (appears in the process image of the outputs).  | 
| 
                   SB  | 
                   Status byte (appears in the process image of the inputs).  | 
| 
                   Cnt-CB  | 
                   Control byte in process data exchange.  | 
| 
                   Cnt-SB  | 
                   Status byte in process data exchange.  | 
| 
                   D0  | 
                   Data byte 0  | 
| 
                   D1  | 
                   Data byte 1  | 
| 
                   D2  | 
                   Data byte 2  | 
| 
                   Res.  | 
                   This byte is assigned to the process data memory, although it has no function.  |