Control and status bytes

Control and status byte of the first channel (L1)

Process data mode

Control byte 1 in process data mode

Control byte 1 (CB1) is located in the output image, and is transmitted from the controller to the KL3403. Note the assignment of the control bytes to the process input data words.

Bit

CB1.7

CB1.6

CB1.5

CB1.4

CB1.3

CB1.2

CB1.1

CB1.0

Name

RegAccess

R/W

ChannelIdx

ProcDatIdx

Key

Bit

Name

Description

CB1.7

RegAccess

0bin

Register communication off (process data mode)

CB1.6

R/W

0bin

Read access

(1bin)

Since the process data registers of the KL3403 can only be read, write access is not sensible.

CB1.5 to CB1.4

ChannelIdx5

Enter the channel index of the channel, from which you want to read a measured value with input data word 1 (DataIN1).

00bin

Channel 1

01bin

Channel 2

10bin

Channel 3

11bin

reserved

CB1.3 to CB1.0

ProcDatIdx

Enter the process data index of the measured value, which you want to read with input data word 1 (DataIN1). The following process data indices are supported:

Index

Symbol

Measured value

Resolution

0000bin

0x0

Irms

Current (rms value)

0.001 A (KL3403-0000, KL3403-0026)
0.005 A (KL3403-0010)
20 µA (KL3403-0020)
5 µA (KL3403-0022)
250 µA (KL3403-0025)
333 µV (KL3403-0333)

0001bin

0x1

Urms

Voltage (rms value)

0.1 V

0010bin

0x2

P

Active power

0.1 W (KL3403-0000, KL3403-0026)
0.5 W (KL3403-0010)
2 mW (KL3403-0020)
flexible, max. 16,000 digit (KL3403-0022)6
25 mW (KL3403-0025)
flexible, max. 16,000 digit (KL3403-0333)6

0011bin

0x3

cos φ

power factor 4

0.01

0100bin

0x4

W

Energy consumption1

default3: 0.01 kWh (KL3403-0000, KL3403-0026)
default3: 0.05 kWh (KL3403-0010)
default3: 0.2 Wh (KL3403-0020)
flexible (KL3403-0022)6
default3: 2.5 Wh (KL3403-0025)
flexible (KL3403-0333)6

0101bin

0x5

Imax

Peak current value2

see index 0dec

0110bin

0x6

Umax

Peak voltage value2

see index 1dec

0111bin

0x7

Pmax

Peak active power value2

see index 2dec

1000bin

0x8

f

Frequency

0.1 Hz (measuring interval: 5 s)

1001bin

0x9

Imin

Minimum current value2

see index 0dec

1010bin

0xA

Umin

Minimum voltage value2

see index 1dec

1011bin

0xB

Pmin

Minimum active power value2

see index 2dec

further

reserved

1)

The energy consumption is counted in RAM and saved every 15 minutes in the EEPROM.
It is retained there even if the KL3403 is switched off. The command-register (R7) can be used to clear the energy value or to save it manually within 15 minutes.

2)

The minimum and peak current value is deleted when the KL3403 is switched off.
It is recommended to clear the minimum and peak values from the user program once the terminal has started up, because it is possible that incorrect values may have been stored during the startup, i.e. before the terminal measurements have stabilized.

3)

The resolution of the energy consumption can be scaled for each channel with its register R35.

4)

The power factor (cos φ) can be displayed with or without sign (see bit R32.5 of the feature register).

5)

The flexible process image must be enabled (R32.3 = 1), in order to be able to read measured values from each channel with input data word 1 (DataIN1)!
With the simple process image (R32.3 = 0), input data word 1 (DataIN1) can only read the first channel (in this case, bits CB1.5, CB1.4 or SB1.5 and SB1.4 are not active).

6)

The read values depend on the voltages and currents connected to the current transformer. They have to be converted by the application.

Control and status bytes 1:

Service life of the EEPROM

The energy consumption is stored in an EEPROM. The EEPROM manufacturer specifies a minimum of 100000, typically 1 million possible write operations for this function block. The resulting service life of the energy consumption memory at continuous operation, assuming that the energy consumption is written to the EEPROM every 15 minutes, is:

    • 2.85 years min.
    • 28.5 years typical

    Status byte 1 in process data mode

    The status byte 1 (SB1) is located in the input image, and is transmitted from the KL3403 to the controller. Pay attention to the assignment of the control bytes to the process input data words in process data mode.

    Bit

    SB1.7

    SB1.6

    SB1.5

    SB1.4

    SB1.3

    SB1.2

    SB1.1

    SB1.0

    Name

    RegAccess

    ERR L1

    ChannelIdx

    ProcDatIdx

    Key

    Bit

    Name

    Description

    SB1.7

    RegAccess

    0bin

    Acknowledgment for process data mode

    SB1.6

    ERR L1

    0bin

    Voltage between L1 and N greater than undervoltage threshold (R36).

    1bin

    Voltage between L1 and N smaller than undervoltage threshold (R36). The ERR L1 LED is on.

    SB1.5 to SB1.4

    ChannelIdx

    00bin

    The input data word 1 (DataIN1) was used to read a measured value from channel 1.

    01bin

    The input data word 1 (DataIN1) was used to read a measured value from channel 2.

    10bin

    The input data word 1 (DataIN1) was used to read a measured value from channel 3.

    11bin

    reserved

    SB1.3 to SB1.0

    ProcDatIdx

    Index of the measured value that was read with input data word 1 (DataIN1).

    Register communication

    Control byte 1 in register communication

    Control byte 1 (CB1) is located in the output image, and is transmitted from the controller to the KL3403.

    Bit

    CB1.7

    CB1.6

    CB1.5

    CB1.4

    CB1.3

    CB1.2

    CB1.1

    CB1.0

    Name

    RegAccess

    R/W

    Reg. no.

    Key

    Bit

    Name

    Description

    CB1.7

    RegAccess

    1bin

    Register communication switched on

    CB1.6

    R/W

    0bin

    Read access

    1bin

    Write access

    CB1.5 to CB1.0

    Reg. no.

    Register number:
    Enter the number of the register that you want to
    - read with input data word 1 read, or
    - write with output data word 1.

    CAUTION

    No process data access during register communication!

    It is not possible to access the data registers during register communication! Process data that may still be displayed is not valid!

    Status byte 1 in register communication

    The status byte 1 (SB1) is located in the input image, and is transmitted from the KL3403 to the controller.

    Bit

    SB1.7

    SB1.6

    SB1.5

    SB1.4

    SB1.3

    SB1.2

    SB1.1

    SB1.0

    Name

    RegAccess

    R

    Reg. no.

    Key

    Bit

    Name

    Description

    SB1.7

    RegAccess

    1bin

    Acknowledgment for register access

    SB1.6

    R

    0bin

    Read access

    SB1.5 to SB1.0

    Reg. no.

    Number of the register that was read or written.

    Control and status byte of the second channel (L2)

    Control byte 2 (CB2) is in output image and is transferred by the controller to the KL3403 (structure and application see Control byte 0). Pay attention to the assignment of the control bytes to the process input data words in process data mode.

    Status byte 2 (SB2) is in the input image and is transferred from the KL3403 to the controller (configuration and application see Status byte 0).

    Control and status byte of the third channel (L3)

    Control byte 3 (CB3) is in output image and is transferred by the controller to the KL3403 (structure and application see Control byte 0). Pay attention to the assignment of the control bytes to the process input data words in process data mode.

    Status byte 3 (SB3) is in the input image and is transferred from the KL3403 to the controller (configuration and application see Status byte 0).