BECKHOFF KL2502 - Manual (Page 13)

Terminal configuration
KL2502, KL2512 11
User parameters 3.2.1.7 R31 to R47 "Application parameters" area (SEEROM)
The application parameters are specific to each terminal type. They can be
modified by the programmer. The application parameters are stored
permanently in a serial EEPROM in the terminal and cannot be destroyed
by power failures. The user area is write protected over a Codeword.
i
Note
R31: Code word register in the RAM
The code word 0x1235 must be entered here to enable modification of
parameters in the user area. Write-protection is set if a different value is
entered in this register. When write protection is inactive, the code word is
returned during reading of the register. The register contains the value zero
when write protection is active.
R32: Feature register
This register defines the operating modes of the terminal. For example, a
user-specific scaling can be activated for the analog I/O’s.
3.2.1.8 R33 to R47
Registers that depend on the terminal type
Extended application area 3.2.1.9 R47 to R63
These registers have not yet been implemented.