Register communication

Control byte (for register communication)

The control byte (CB) is located in the output image, and is transmitted from the controller to the terminal.

Bit	Name	Description
CB.7	RegAccess	1_bin: Register communication switched on
CB.6	R/W	0_bin: Read access 1_bin: Write access
CB.5 to CB.0	Reg. no.	Register number: Enter here the number of the register that you wish - to read with input data word DataIN, or - to write with output data word DataOUT.

Bit

Name

Description

CB.7

RegAccess

1_bin: Register communication switched on

CB.6

R/W

0_bin: Read access

1_bin: Write access

CB.5 to CB.0

Reg. no.

Register number:
Enter here the number of the register that you wish
- to read with input data word DataIN, or
- to write with output data word DataOUT.

Status byte (for register communication)

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

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