Register communication

Control byte 1 (in register communication)

Control byte 1 (CB1) is located in the output image, and is transmitted from the controller to the terminal.

Bit	CB1.7	CB1.6	CB1.5	CB1.4	CB1.3	CB1.2	CB1.1	CB1.0
Name	RegAccess	R/W	Reg. no.

Bit	Name	Description
CB1.7	RegAccess	1_bin	Register communication switched on
CB1.6	R/W	0_bin	Read access
CB1.6	R/W	1_bin	Write access
CB1.5 to CB1.0	Reg. no.	Register number: Enter the number of the register that you want to read with input data word DataIn or want to write with output data word DataOut.

The status byte 1 (SB1) is located in the input image and is transmitted from terminal to the controller.

Bit	SB1.7	SB1.6	SB1.5	SB1.4	SB1.3	SB1.2	SB1.1	SB1.0
Name	RegAccess	R/W	Reg. no.

Bit	Name	Description
SB1.7	RegAccess	1_bin	Acknowledgement for register access
SB1.6	R	0_bin	Read access
SB1.5 to SB1.0	Reg. no.	Number of the register that was read or written.