KL8548 - Process image

The KL8548 is represented in the process image with 24 bytes each of input and output data. These are organized as follows:

Byte offset (without word alignment)	Byte offset (with word alignment*)	Format	Input data	Output data
0	0	Byte	SB1	CB1
1	2	Word	DataIN1	DataOUT1
3	4	Byte	SB2	CB2
4	6	Word	DataIN2	DataOUT2
6	8	Byte	SB3	CB3
7	10	Word	DataIN3	DataOUT3
9	12	Byte	SB4	CB5
10	14	Word	DataIN4	DataOUT4
12	16	Byte	SB1	CB1
13	18	Word	DataIN5	DataOUT5
15	20	Byte	SB2	CB2
16	22	Word	DataIN6	DataOUT6
18	24	Byte	SB3	CB3
19	26	Word	DataIN7	DataOUT7
21	28	Byte	SB4	CB5
22	30	Word	DataIN8	DataOUT8

*) Word alignment: The Bus Coupler places values on even byte addresses

Key

SB1 to SB8: status bytes of channels 1 to 8
CB1 to CB8: control bytes of channels 1 to 8
DataIN1 to DataIN8: input words of channels 1 to 8
DataOUT1 to DataOUT8: output words of channels 1 to 8

Control and status byte

See chapter Control and status byte

Process data

Input data (DataIN1 to DataIN8)

Position of the potentiometers with user scaling switched off (R32.0 = 0)

Potentiometer position	Input value in the PLC
Potentiometer position	hexadecimal	decimal
CCW stop	0x0000	0
Center	0x3FFF	16383
CW stop	0x7FFF	32767

Output data (DataOUT1 to DataOUT8)

Specification of the output values by the controller.

Output value		Output voltage
hexadecimal	decimal	Output voltage
0x0000	0	0 V
0x3FFF	16383	+5 V
0x7FFF	32767	+10 V