IE2808 Mapping

Compact evaluation
	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: no Motorola format: don't care Word alignment: don't care	0	-	-	Out2	Out1

Complete evaluation in Intel format
	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: don't care Word alignment: no	0	Diag1	SB	Out1	CB
	1	-	Diag2	-	Out2

Complete evaluation in Intel format with word alignment
	Address	Input data		Output data
Conditions	Word offset	High byte	Low byte	High byte	Low byte
Complete evaluation: yes Motorola format: don't care Word alignment: yes	0	Diag1	SB	Out1	CB
	1	res.	Diag2	res.	Out2

Key

Complete evaluation: Additionally to the process data the control and status bytes are showed in the address area
Motorola format: Motorola or Intel format can be set.
Word alignment: in order that the address area of each channel starts always on a word boundary, dummy bytes are added to the process image

SB: Status Byte (appears in the process image of the inputs)
CB: Control Byte (appears in the process image of the outputs)

Out1: Input bits of channel 8 to 1
Out2: Input bits of channel 16 to 9

Diag1: Diagnostic bits of channel 8 to 1
Diag2: Diagnostic bits of channel 16 to 9

res.: reserved; Although this byte occupies space in the process data memory, it has no function.
"-": This byte is not used or occupied by the Fieldbus Box.