Register description
The following registers are used for parameterization of the KL3681. They can be read or written via the register communication with the aid of control, status and data bytes.
- R0: Raw value A/D-C
Raw value of the A/D converter (XR)
- R1: Current measuring range / mode
- R2: Internal calibration value
- R3: Sampling duration
In milliseconds
- R4: Register page selection register
This register defines which register page is displayed in registers R32 to R63 (default: 0x0000).
The terminal supports two register pages. - Register page 0 is used to save the configuration data (see from register RP0.R32)
- Register page 1 is used for internal calibration data and manufacturer calibration and must not be changed by the user!
- R6: Diagnostic register
The status byte is mapped to the low-order byte (bit 7 to bit 0) of register R6.
The high-order byte (bit 15 to bit 8) of register R6 is reserved.
- 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
An entry of 0X7000 in register R7 sets the following registers for the two channels to the following default values:
- R8: Terminal description
The terminal identifier is contained in register R8: KL3681: 0x0E61 (3681dec).
- R9: Firmware version
Register R9 contains the ASCII coding of the terminal's firmware revision level, e.g. 0x3141 (1A)ASCII. '0x31' corresponds to the ASCII character '1' and '0x41' to the ASCII character 'A'. This value cannot be changed.
- R10: Data length (multiplex shift register)
R10 contains the number of multiplexed shift registers and their length in bits.
- R11: Signal channels
Unlike R10, this contains the number of channels that are logically present. Thus for example a shift register that is physically present can perfectly well consist of several signal channels.
- R12: Minimum data length
The particular byte contains the minimum data length for a channel that is to be transferred. If the MSB is set, the control and status byte is not necessarily required for the terminal function and is not transferred to the control, if the Bus Coupler is configured accordingly.
- R13: Data structure (data type register)
Data type register | Meaning |
|---|---|
0x00 | Terminal with no valid data type |
0x01 | Byte array |
0x02 | Structure: 1 byte, n bytes |
0x03 | Word array |
0x04 | Structure: 1 byte, n words |
0x05 | Double word array |
0x06 | Structure: 1 byte, n double words |
0x07 | Structure: 1 byte, 1 double word |
0x08 | Structure: 1 byte, 1 double word |
0x11 | Byte array with variable logical channel length |
0x12 | Structure: 1 byte, n bytes with variable logical channel length (e.g. 60xx) |
0x13 | Word array with variable logical channel length |
0x14 | Structure: 1 byte, n words with variable logical channel length |
0x15 | Double word array with variable logical channel length |
0x16 | Structure: 1 byte, n double words with variable logical channel length |
- R15: Alignment register
Via the alignment register bits, the Bus Coupler arranges the address range of an analog terminal such that it starts at a byte boundary.
- R16: Hardware version number
Register R16 contains the hardware revision level of the terminal; this value cannot be changed.
- R29: Terminal type, special version
The special terminal identifier is contained in register R8: KL3681-0000: 0x0000 (0)dec).
- 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 stored in the RAM registers and in the SEEPROM registers and are therefore retained if the terminal is restarted.
- The code word is reset with each restart of the terminal.
Register page 0
If register page 0 was selected with register R4, registers R32 to R63 have the following meaning.
- R32: Feature register
The feature register specifies the terminal's configuration. Default: 0x2804 (10244dec)
Bit | R32.15 | R32.14 | R32.13 | R32.12 | R32.11 | R32.10 | R32.9 | R32.8 |
Name | presentation | enFilter | - | - | enUserCalli | |||
Bit | R32.7 | R32.6 | R32.5 | R32.4 | R32.3 | R32.2 | R32.1 | R32.0 |
Name | frequency | - | - | - | - | enWdTimer | - | - |
Bit | Name | Description | Default | |
|---|---|---|---|---|
R32.15 to | presentation | 0dec | Left aligned (In left aligned presentation the extended measuring range is not available!) | 2dec |
1dec | right aligned | |||
2dec | scaled: 1 bit per µV/µA | |||
3dec | reserved | |||
4dec | reserved | |||
5dec | float: Scaled presentation in floating-point format | |||
6dec | reserved | |||
7dec | reserved | |||
R32.12 | - | reserved | 0bin | |
R32.11 | enFilter | 0bin | Filter not active | 1bin |
1bin | filter active | |||
R32.10 | enLimit2 | 0bin | Threshold 2 is not active | 0bin |
1bin | Threshold 2 is active | |||
R32.9 | enLimit1 | 0bin | Threshold 1 is not active | 0bin |
1bin | Threshold 1 is active | |||
R32.8 | enUserCalli | 0bin | User calibration not active | 0bin |
1bin | User calibration active | |||
R32.7 | frequency | 0bin | 50 Hz mains frequency | 0bin |
1bin | 60 Hz mains frequency | |||
R32.6 | - | reserved | 0bin | |
... | ... | ... | ... | |
R32.3 | - | reserved | 0bin | |
R32.2 | enWdTimer | 0bin | Watchdog timer is not active | 1bin |
1bin | Watchdog timer is active (the watchdog is triggered if no process data are received for 100 ms) | |||
R32.1 | - | reserved | 0bin | |
R32.0 | - | reserved | 0bin | |
- R33: Zero Comp Interval
- R36: User scaling, measuring range 300 mV DC, offset
(Default: 0x0000)
- R37: User scaling, measuring range 300 mV DC, gain
(Default: 0x2000)
- R38: User scaling, measuring range 3 V DC, offset
(Default: 0x0000)
- R39: User scaling, measuring range 3 V DC, gain
(Default: 0x2000)
- R40: User scaling, measuring range 30 V DC, offset
(Default: 0x0000)
- R41: User scaling, measuring range 30 V DC, gain
(Default: 0x2000)
- R42: User scaling, measuring range 300 V DC, offset
(Default: 0x0000)
- R43: User scaling, measuring range 300 V DC, gain
(Default: 0x2000)
- R44: User scaling, measuring range 300 mV AC, offset
(Default: 0x0000)
- R45: User scaling, measuring range 300 mV AC, gain
(Default: 0x2000)
- R46: User scaling, measuring range 3 V AC, offset
(Default: 0x0000)
- R47: User scaling, measuring range 3 V AC, gain
(Default: 0x2000)
- R48: User scaling, measuring range 30 V AC, offset
(Default: 0x0000)
- R49: User scaling, measuring range 30 V AC, gain
(Default: 0x2000)
- R50: User scaling, measuring range 300 V AC, offset
(Default: 0x0000)
- R51: User scaling, measuring range 300 V AC, gain
(Default: 0x2000)
- R52: User scaling, measuring range 100 mA DC, offset
(Default: 0x0000)
- R53: User scaling, measuring range 100 mA DC, gain
(Default: 0x2000)
- R54: User scaling, measuring range 1 A DC, offset
(Default: 0x0000)
- R55: User scaling, measuring range 1 A DC, gain
(Default: 0x2000)
- R56: User scaling, measuring range 10 A DC, offset
(Default: 0x0000)
- R57: User scaling, measuring range 10 A DC, gain
(Default: 0x2000)
- R58: User scaling, measuring range 100 mA AC, offset
(Default: 0x0000)
- R59: User scaling, measuring range 100 mA AC, gain
(Default: 0x2000)
- R60: User scaling, measuring range 1 A AC, offset
(Default: 0x0000)
- R61: User scaling, measuring range 1 A AC, gain
(Default: 0x2000)
- R62: User scaling, measuring range 10 A AC, offset
(Default: 0x0000)
- R63: User scaling, measuring range 10 A AC, gain
(Default: 0x2000)
Register page 1
If register page 1 was selected with register R4, registers R32 to R63 have the following meaning.
- R32 to R35: Internal calibration data
These registers contain internal calibration data and must not be changed by the user!
- R36 to R63: Manufacturer calibration
These registers are used for manufacturer calibration and must not be changed by the user!