BECKHOFF KL3681 - Manual (Page 30)

Access from the user programm
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 Register no. Register number:
Enter here the number of the register [
} 31] that you wish
­ to read with input data word DataIN [ } 28], or
­ to write with output data word DataOUT [ } 28].
Status byte (at register communication)
The status byte (SB) is located in the input image [ } 28] and is transmitted from terminal to the controller.
Bit SB.7 SB.6 SB.5 SB.4 SB.3 SB.2 SB.1 SB.0
Name RegAccess R/W Register no.
Bit Name Description
SB.7 RegAccess 1
bin
Acknowledge for register access
SB.6 R 0
bin
Read access
SB.5 to SB.0 Register no. Number of the register that was read or written.
KL3681, KS3681 30 Version 2.0.0