BECKHOFF KL5111-0000 - Manual (Page 19)

Register description
KL5111-0000 17
Example 2
Writing register 31 in the BK2000 with an intelligent terminal and the end terminal.
If the following bytes (user code word) are transferred from the controller to the terminal,
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataOUT 1 DataOUT 0 Nicht benutzt Control-Byte
Wert 0x12 0x35 0xXX 0xDF
the user code word is set and the terminal returns the register address with the bit 7 for register access
and the acknowledgement.
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataIN 1 DataIN 0 Nicht benutzt Status-Byte
Wert 0x00 0x00 0x00 0x9F