Register description
All registers can be read or written via register communication. They are used for parameterizing the terminals.
The behavior in conjunction with a K-bus watchdog (R33 ... R35) and the behavior of the inputs DI1 and DI2 (R36 ... R47) can be modified via library blocks.
R6: diagnostic register
Bit | Description | default | |
|---|---|---|---|
R6.5-15 | - | reserved | - |
R6.4 | 1bin | Buffer is full | 0bin |
R6.3 | 1bin | An overrun error has occurred | 0bin |
R6.2 | 1bin | A framing error has occurred | 0bin |
R6.1 | 1bin | A parity error has occurred | 0bin |
R6.0 | 1bin | The receive buffer has overflowed, incoming data is lost | 0bin |
R7: command register
 | User code word For the following commands to be executed, it is first necessary for the user code word, 0x1235, to be entered into register R31. |
Command 0x7000: Restore Factory Settings
Entering 0x7000 in register R7 restores the delivery state for the following registers:
R33, 34 and 35: No SMI command with K-bus watchdog
R36, 37 and 38: All SMI drives travel UP on rising edge at DI1
R39, 40 and 41: All SMI drives stop on falling edge at DI1
R42, 43 and 44: All SMI drives travel DOWN on rising edge at DI2
R45, 46 and 47: All SMI drives stop on falling edge at DI2
R8: terminal type
The terminal name is contained in register R8:
KL6831: 0x1AAF (6831dec)
KL6841: 0x1AB9 (6841dec)
R9: firmware version
Register R9 contains the ASCII coding of the terminal's firmware version, e.g. 0x3143 = '1C'. The '0x31' corresponds here to the ASCII character '1', while the '0x43' represents the ASCII character 'C'.
This value cannot be changed.
R16: hardware version number
Register R16 contains the hardware version of the terminal.
R31-R47: user registers
R31: code word register
- If you write values into the user registers without first entering the user code word (0x1235) into the code word register, the terminal will not accept the supplied data.
- If you write values into the user registers and have previously entered the user code word (0x1235) in the code word register, these values are written into the RAM registers and in the EEPROM registers and are therefore retained if the terminal is restarted.
The code word is reset if the terminal is restarted.
R32: feature register
The feature register R32 is not occupied.
R33, R34 and R35: watchdog
The R33, 34 and 35 determine the behavior of the terminal in the event of a K-bus watchdog.
The factory setting is: No SMI command if the K-bus watchdog is triggered.
The behavior can be changed via the library blocks.
R36 to R47: Behavior of DI1 and DI2
The behavior of the digital inputs DI1 and DI2 can be modified via the library function blocks.
Digital input | SMI command |
|---|---|
Rising edge at DI1 | All SMI drives travel UP on rising edge at DI1 (factory setting) |
Falling edge at DI1 | All SMI drives stop on falling edge at DI1 (factory setting) |
Rising edge at DI2 | All SMI drives travel DOWN on rising edge at DI2 (factory setting) |
Falling edge at DI2 | All SMI drives stop on falling edge at DI2 (factory setting) |