BECKHOFF KL3041 - Manual (Page 19)

Register Description
KL304x and KL305x 17
Example 1 Reading of register 8 in the BK2000 with a KL3042 and the end terminal:
If the following bytes are transferred from the control to the terminal,
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataOUT 1 DataOUT 0 Not used Control byte
Value 0xXX 0xXX 0xXX 0x88
the terminal returns the following type identifier (0x0BE2 corresponds to
unsigned integer 3042).
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataIN 1 DataIN 0 Not used Status byte
Value 0x0B 0xE2 0x00 0x88
Example 2
Writing of register 31 in the BK2000 with an intelligent terminal and the end
terminal:
If the following bytes (code word) are transferred from the control to the
terminal,
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataOUT 1 DataOUT 0 Not used Control byte
Value 0x12 0x35 0xXX 0xDF
the code word is set, and the terminal returns the register address with bit
7 for register access as acknowledgement.
Byte Byte 3 Byte 2 Byte 1 Byte 0
Name DataIN 1 DataIN 0 Not used Status byte
Value 0x00 0x00 0x00 0x9F