Register description

The registers are used for parameterization of the Bus Terminals and are present once for each channel. They can be read or written by means of register communication.

R0: A/D converter, raw value
Register R0 contains the raw value of the analog/digital converter. This is the unchanged analog value prior to any scaling.

R1: A/D converter, raw value of the line
Register R1 contains the raw value of the line resistance between +R1 – RL1 or between +R2 – RL2.

R6: diagnostic register
The status byte SBn of Channel n is shown in the low byte of register R6.

R7: command register
The command register of KL3222 is currently not used.

R8: terminal designation
Register R8 contains the name of the terminal: KL3222: 0x0C9C (3222_dec)

R9: firmware version
Register R9 contains the ASCII coding of the terminal's firmware version, e.g. 0x3141 = '1A'. The '0x31' corresponds here to the ASCII character '1', while the '0x41' represents the ASCII character 'A'.
This value cannot be changed.

R12: minimum data length of a channel

Bits 0 to 6 of the high-order byte indicate the minimum number of output data in bits: 000.0000_bin= 0_dec so 0 bytes.
Bits 0 to 6 of the low-order byte indicate the minimum number of input data in bits: 001.1000_bin = 24_dec so 3 bytes.
The fact that bit 7 is set indicates that the control and status byte are not mandatory for the terminal function and are not transferred in compact mode.

R16: hardware version number
Register R16 contains the hardware version of the terminal.

R17: manufacturer compensation - offset
This register contains the offset of the vendor calibration.

R18: manufacturer compensation - gain
This register contains the gain of the vendor calibration.

R19: manufacturer scaling - offset
This register contains the offset of the manufacturer scaling. It can be enabled by R32.1 in the feature register.

R20: manufacturer scaling - gain
This register contains the gain of the manufacturer scaling. It can be enabled by R32.1 in the feature register.

R23: reference calibration value: offset
This register contains the reference value of the calibration, which is determined during the vendor calibration.

R24: reference calibration value: gain
This register contains the reference value of the calibration, which is determined during the vendor calibration.

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 if the terminal is restarted.
Feature register (R32)
The feature register specifies the terminal's operation mode.

Bit	R32.15	R32.14	R32.13	R32.12	R32.11	R32.10	R32.9	R32.8
Name	SensorType

Bit	R32.7	R32.6	R32.5	R32.4	R32.3	R32.2	R32.1	R32.0
Name	ConnectionTech		Resolution	-	-	Watchdog	enManScal	enUsrScal

Key
Bit	Name	Description		Default
R32.15 ... R32.08	SensorType	0_dec	PT100	0_bin
		1_dec	NI100
		2_dec	PT1000
		3_dec	PT500
		4_dec	PT200
		5_dec	NI1000
		6_dec	NI120
		7_dec	RS1000
		14_dec	RTD_RES16
		15_dec	RTD_RES64
		16_dec	RTD_KTSIEMENS2K
		17_dec	KTY81110
		18_dec	KTY81121
		19_dec	KTY81122
		20_dec	KTY81151
		21_dec	KTY81221
		22_dec	KTY81210
		23_dec	KTY81221
		24_dec	KTY81222
		25_dec	KTY81251
		26_dec	KTY81252
		27_dec	KTY83110
		28_dec	KTY83121
		29_dec	KTY83122
		30_dec	KTY83151
		31_dec	KTY83152
		32_dec	KTY84130
		33_dec	KTY84151
		34_dec	KTSIEMENS1K
		35_dec	KTSIEMENS2K_5
		36_dec	KTSIEMENS2K_7
		37_dec	KTSIEMENS1K_5
		38_dec	KTSIEMENS1K_7
		others	reserved
R32.7...R32.6	ConnectionTech	00_dec	Two-conductor (not applicable, see note 2/3 conductor measurement)	10_bin
		01_dec	Three-conductor (not applicable, see note 2/3 conductor measurement)
		10_dec	Four-wire
		11_dec	not connected
R32.5	Resolution	0_bin	Resolution: 1/10 °C	1_bin
R32.5	Resolution	1_bin	Resolution: 1/100 °C (high-precision)	1_bin
R32.4	enS format	0_bin	Siemens format not active	0_bin
R32.4	enS format	1_bin	Siemens format active	0_bin
R32.3	-	0_bin	reserved	0_bin
R32.2	Watchdog	0_bin	Watchdog not active	1_bin
R32.2	Watchdog	1_bin	Watchdog active	1_bin
R32.1	enManScal	0_bin	Manufacturer scaling is not active	0_bin
R32.1	enManScal	1_bin	Manufacturer scaling is active	0_bin
R32.0	enUsrScal	0_bin	User scaling is not active	0_bin
R32.0	enUsrScal	1_bin	User scaling is active	0_bin

R33: User scaling - offset
This register contains the offset of the user scaling. User scaling can be enabled in the feature register via bit R32.0.

R34: user scaling - gain
This register contains the gain of the user scaling. User scaling can be enabled in the feature register via bit R32.0.

R37: filter constant of the A/D converter

Value in R37	Limit frequency	Default
0_dec	50 Hz	0_dec
1_dec	60 Hz
2_dec	100 Hz
3_dec	500 Hz
4_dec	1000 Hz
5_dec	2000 Hz
6_dec	3750 Hz
7_dec	7500 Hz
8_dec	15 kHz
9_dec	30 kHz
10_dec	5 Hz
11_dec	10 Hz