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 module.

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

1bin

Register communication switched on

CB1.6

R/W

0bin

Read access

1bin

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.

Status byte 1 (in register communication)

Status byte 1 (SB1) is located in the input image and is transmitted from terminal module 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

1bin

Acknowledgment for register access

SB1.6

R

0bin

Read access

SB1.5 to SB1.0

Reg. no.

Number of the register that was read or written.