AKT2G-DN-002-000

Up/Down Counter 24 VDC, 100 kHz, 32 bit counter depth

The up/down counter counts binary pulses, and transmits the counter state, in an electrically isolated form, to the higher-level automation device.

The AKT2G-DN-002 EtherCATClosed***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs Terminal can alternatively be operated as:

  • a single-channel counter (32 bit) that can be toggled between counting up and down via the U/D input (delivery state)
  • a single-channel counter (32 bit) that is controlled via the gate connection
  • two separate logic counters (32 bit) that can count in one direction only with the Clock 1 and Clock 2 inputs

The signal state of the inputs and outputs is indicated by light emitting diodes.

The two outputs (Output 1 and Output 2) are switched in relation to the counter value and can thus be used as fast control signals for field devices.

The AKT2G-DN-002 supports distributed clocks, i.e. the input data can be monitored synchronously with other data that are also linked to distributed clock terminals. The accuracy across the system is < 100 ns.

Related Topics: Map Input and Output to Variables

LEDs and Connection

LEDs

LED Color Meaning

UP/DOWN, GATE CLOCK CH.1

green

Signal at U/D, Gate input (operating mode 32 bit up/down counter, 32 bit gated counter)

Signal at the Clock input, channel 1 (operating mode 2 x 32 bit counter)

see "Operating Mode Selection"

CLOCK

CLOCK CH.2

green

Signal at Clock input (operating mode 32 bit up/down counter, 32 bit gated counter)

Signal at the Clock input, channel 2 (operating mode 2 x 32 bit counter

see "Operating Mode Selection"

OUTPUT1

OUTPUT2

green

Signal at the corresponding output

Connection

Terminal Point Description
Name No.

U/D, Gate Clock Ch.1

1

Up/down input (operating mode 32 bit up/down counter),

Gate input (operating mode 32 bit counter with gate function) Clock 1 input (operating mode 2 x 32 bit counter)

see "Operating Mode Selection"

+24 V

2

+24 V (internally connected to terminal point 6 and positive power contact)

0 V

3

0 V (internally connected to terminal point 7 and negative power contact)

Output 1

4

Output 1

Clock

Clock Ch.2

5

Clock input (operating mode 32 bit up/down counter) and (operating mode 32 bit counter with gate function)

Clock 2 input (operating mode 2 x 32 bit counter)

see "Operating Mode Selection"

+24 V

6

+24 V (internally connected to terminal point 2 and positive power contact)

0 V

7

0 V (internally connected to terminal point 3 and negative power contact)
Output 2 8 Output 2

Basic Function Principles

The AKT2G-DN-002 input terminals count binary pulses and transfer the current value to the higher-level controller.

In addition to the 32 bit up/down counter, further available operating modes are a 32 bit gated counter or two 32 bit counters. In gated counter mode, a low or high level at the Gate input inhibits the counting function of the terminal.

If two 32 bit counters are active, the U/D input (terminal point 1) is configured as the input for the first counter and the Clock 2 input (terminal point 5) as the input for the second counter.

Beyond that, two digital outputs can be set.

The maximum input frequency is limited to 100 kHz for the AKT2G-DN-002; the counters react to the rising edgeClosedA rising edge is the transition of a digital signal from low to high. It is also called positive edge of the input signal.

Operating Mode Selection

The following operation modes are possible.

Operation mode Predefined PDOClosedPDO is a type of protocol frame used in some fieldbuses. A PDO contains one or more object dictionary entries, which define the application data transferred between devices. Assignment Setting of the counting direction via CoE directory Switchable outputs

1 (default)

1Ch. +/- Counter:

0x1A02 – CNT Inputs

+

0x1602 – CNT Outputs

Index 0x8020:05:

0: Enable UD counter

  • UD input (terminal point 1): sets the counting direction:
    • High level: up;
    • Low level: Down
  • Clock input (terminal point 5): indicates the individual pulses.

Output 1

2

1Ch. +/- Counter:

0x1A02 – CNT Inputs

+

0x1602 – CNT Outputs

Index 0x8020:05:

1: Enable pos. gate

  • Gate is inhibited by a positive level on the gate input (terminal point 1)
  • Clock input (terminal point 5):

indicates the individual pulses.

+

Index 0x8020:04:

0: up counter

1: down counter

Output 1

3

1Ch. +/- Counter:

0x1A02 – CNT Inputs

+

0x1602 – CNT Outputs

Index 0x8020:05:

2: Enable neg. gate

  • Gate is inhibited by a negative level on the gate input (terminal point 1)
  • Clock input (terminal point 5): indicates the individual pulses.

+

Index 0x8020:04:

0: up counter

1: down counter

Output 1

4

2Ch. Counter:

0x1A00 – CNT Inputs Channel 1

0x1A01 – CNT Inputs Channel 2

+

0x1600 – CNT Outputs Channel 1

0x1601 – CNT Outputs Channel 2

Index 0x8000:04 (Channel1) and
Index 0x8010:04 (Channel2)

0:up counter

1:down counter

Counter 1 → Output 1

Counter 2 → Output 2

In addition, the distributed clock function may be activated for the AKT2G-DN-002.

Single-channel up/down counter, gated counter (operating mode 1-3)

  1. Selection of the PDOs for "1Ch.+/-Counter"
  2. CoE Init-command to configure index 0x8020:05:
    • "Enable UD counter" – single-channel up/down counter (operating mode 1)
      If a high signal level is encountered at the up/down input of the terminal (terminal point 1), the counter counts up in the event of positive edges at the clock input (terminal point 5), with a low signal level it counts down.
    • "Enable pos. gate" – single-channel gated counter closes in the case of a high level (operating mode 2)
      The counter is inhibited if a high level is encountered at the gate input of the terminal (terminal point 1).
      The counting direction is set by index 0x8020:04 (0: up, 1: down). The clock input (terminal point 5) indicates the individual pulses.
    • "Enable neg. gate" – single-channel gated counter closes in the case of a low level (operating mode 3)
      The counter is inhibited if a low level is encountered at the gate input of the terminal (terminal point 1).The counting direction is set by index 0x8020:04 (0: up, 1: down).
      The clock input (terminal point 5) indicates the individual pulses.

Two-channel up/down counter (operating mode 4)

  1. Selection of the PDOs for "2Ch. Counter"
    The terminal points 1 or 5 serve as clock input for 32 bit counter 1 or 2.
  2. CoE Init-commands to configure the indices 0x8000:04 for channel 1 and 0x8010:04 for channel. Two options are available per channel:
    • 0: up counter
    • 1: down counter

Objects for Commissioning

Index 1011 Restore default parameters
Index (hex) Name Meaning Data type Flags Default

1011:0

Restore default parameters

Restore default parameters

UINT8

RO

0x01 (1dec)

1011:01

SubIndex 001

If this object is set to “0x64616F6C” in the set value dialog, all backup objects are reset to their delivery state.

UINT32

RW

0x00000000

(0dec)
Index 8000 CNT Settings Ch.1
Index (hex) Name Meaning Data type Flags Default

8000:0

CNT Settings Ch.1

Maximum subindex

UINT8

RO

0x13 (19dec)

8000:01

Enable function to set output

Activates the function for setting Output 1

BOOLEAN

RW

0x00 (0dec)

8000:02

Enable function to reset output

Activates the function for resetting Output 1

BOOLEAN

RW

0x00 (0dec)

8000:03

Enable reload

The counter counts to the value in index 0x8000:13

BOOLEAN

RW

0x00 (0dec)

8000:04

Count down

Counting direction:

•   0: Up

•   1: Down

BOOLEAN

RW

0x00 (0dec)

8000:11

Switch on threshold value

Switch-on threshold value for Output 1

UINT32

RW

0x00000000

(0dec)

8000:12

Switch off threshold value

Switch-off threshold value for Output 1

UINT32

RW

0x00000000

(0dec)

8000:13

Counter reload value

The limit that can be activated via "Enable reload" (index 0x8000:03).

The counter counts to this limit and, on exceeding it, begins again at zero.

UINT32

RW

0x00000001

(1dec)
Index 8010 CNT Settings Ch.2
Index (hex) Name Meaning Data type Flags Default

8010:0

CNT Settings Ch.2

Maximum subindex

UINT8

RO

0x13 (19dec)

8010:01

Enable function to set output

Activates the function for setting Output 2

BOOLEAN

RW

0x00 (0dec)

8010:02

Enable function to reset output

Activates the function for resetting Output 2

BOOLEAN

RW

0x00 (0dec)

8010:03

Enable reload

The counter counts to the value in index 0x8010:13

BOOLEAN

RW

0x00 (0dec)

8010:04

Count down

Counting direction

•   0: Up

•   1: Down

BOOLEAN

RW

0x00 (0dec)

8010:11

Switch on threshold value

Switch-on threshold value for Output 2

UINT32

RW

0x00000000

(0dec)

8010:12

Switch off threshold value

Switch-off threshold value for Output 2

UINT32

RW

0x00000000

(0dec)

8010:13

Counter reload value

The limit that can be activated via "Enable reload" (index 0x8010:03).

The counter counts to this limit and, on exceeding it, begins again at zero.

UINT32

RW

0x00000001

(1dec)
Index 8020 CNT Settings
Index (hex) Name Meaning Data type Flags Default

8020:0

CNT Settings

Maximum subindex

UINT8

RO

0x13 (19dec)

8020:01

Enable function to set output

Activates the function for setting Output 1

BOOLEAN

RW

0x00 (0dec)

8020:02

Enable function to reset output

Activates the function for resetting Output 1

BOOLEAN

RW

0x00 (0dec)

8020:03

Enable reload

The counter counts to the value in index 0x8020:13

BOOLEAN

RW

0x00 (0dec)

8020:04

Count down

Counting direction

•   0: Up

•   1: Down

BOOLEAN

RW

0x00 (0dec)

8020:05

Operating mode

Operating mode

•   0: Enable UD counter

U/D input (terminal point 1) specifies the counting direction:

High level: up, low level: down

•   1: Enable pos. gate (gate inhibits with positive level)

•   2: Enable neg. gate (gate inhibits with negative level)

BIT2

RW

0x00 (0dec)

8020:11

Switch on threshold value

Switch-on threshold value for Output 1

UINT32

RW

0x00000000

(0dec)

8020:12

Switch off threshold value

Switch-off threshold value for Output 1

UINT32

RW

0x00000000

(0dec)

8020:13

Counter reload value

The limit that can be activated via "Enable reload" (index 0x8020:03 ).

The counter counts to this limit and, on exceeding it, begins again at zero.

UINT32

RW

0x00000001

(1dec)

Profile-specific objects (0x6000-0xFFFF)

The profile-specific objects have the same meaning for all EtherCAT slaves that support the profile 5001.

Index 6000 CNT Inputs Ch.1
Index (hex) Name Meaning Data type Flags Default

6000:0

CNT Inputs Ch.1

Maximum subindex

UINT8

RO

0x11 (17dec)

6000:01

Output functions enabled

This bit indicates that the internal functions for the output have been enabled

BOOLEAN

RO

0x00 (0dec)

6000:02

Status of output

Status of the output

BOOLEAN

RO

0x00 (0dec)

6000:03

Set counter done

The counter was set

BOOLEAN

RO

0x00 (0dec)

6000:04

Counter inhibited

The counter is stopped for as long as this bit is set

BOOLEAN

RO

0x00 (0dec)

6000:06

Status of input clock

State of the Clock input (high level applied)

BOOLEAN

RO

0x00 (0dec)

6000:0E

Sync Error

Synchronization error

BOOLEAN

RO

0x00 (0dec)

6000:10

TxPDO Toggle

The TxPDO toggle is toggled by the slave when the data of the associated TxPDO is updated

BOOLEAN

RO

0x00 (0dec)

6000:11

Counter value

Counter value

UINT32

RO

0x00000000

(0dec)
Index 6010 CNT Inputs Ch.2
Index (hex) Name Meaning Data type Flags Default

6010:0

CNT Inputs Ch.2

Maximum subindex

UINT8

RO

0x11 (17dec)

6010:01

Output functions enabled

This bit indicates that the internal functions for the output have been enabled

BOOLEAN

RO

0x00 (0dec)

6010:02

Status of output

Status of the output

BOOLEAN

RO

0x00 (0dec)

6010:03

Set counter done

The counter was set

BOOLEAN

RO

0x00 (0dec)

6010:04

Counter inhibited

The counter is stopped for as long as this bit is set

BOOLEAN

RO

0x00 (0dec)

6010:06

Status of input clock

State of the Clock input (high level applied)

BOOLEAN

RO

0x00 (0dec)

6010:0E

Sync Error

Synchronization error

BOOLEAN

RO

0x00 (0dec)

6010:10

TxPDO Toggle

The TxPDO toggle is toggled by the slave when the data of the associated TxPDO is updated

BOOLEAN

RO

0x00 (0dec)

6010:11

Counter value

Counter value

UINT32

RO

0x00000000

(0dec)
Index 6020 CNT Inputs
Index (hex) Name Meaning Data type Flags Default

6020:0

CNT Inputs

Maximum subindex

UINT8

RO

0x11 (17dec)

6020:01

Output functions enabled

This bit indicates that the internal functions for the output have been enabled

BOOLEAN

RO

0x00 (0dec)

6020:02

Status of output

Status of the output

BOOLEAN

RO

0x00 (0dec)

6020:03

Set counter done

The counter was set.

BOOLEAN

RO

0x00 (0dec)

6020:04

Counter inhibited

The counter is stopped for as long as this bit is set

BOOLEAN

RO

0x00 (0dec)

6020:05

Status of input UD

State of the Up/Down input (high level applied)

BOOLEAN

RO

0x00 (0dec)

6020:06

Status of input clock

State of the Clock input (high level applied)

BOOLEAN

RO

0x00 (0dec)

6020:0E

Sync Error

Synchronization error

BOOLEAN

RO

0x00 (0dec)

6020:10

TxPDO Toggle

The TxPDO toggle is toggled by the slave when the data of the associated TxPDO is updated

BOOLEAN

RO

0x00 (0dec)

6020:11

Counter value

Counter value

UINT32

RO

0x00000000

(0dec)
Index 7000 CNT Outputs Ch.1
Index (hex) Name Meaning Data type Flags Default

7000:0

CNT Outputs Ch.1

Maximum subindex

UINT8

RO

0x11 (17dec)

7000:01

Enable output functions

The internal functions for the output are enabled via this bit

BOOLEAN

RO

0x00 (0dec)

7000:02

Set output

Set output

BOOLEAN

RO

0x00 (0dec)

7000:03

Set counter

Set counter

BOOLEAN

RO

0x00 (0dec)

7000:04

Inhibit counter

The counter is stopped as long as this bit is active. The previous counter state is retained.

BOOLEAN

RO

0x00 (0dec)

7000:11

Set counter value

This is the counter value to be set via “Set counter” (index 0x7000:03).

UINT32

RO

0x00000000

(0dec)
Index 7010 CNT Outputs Ch.2
Index (hex) Name Meaning Data type Flags Default

7010:0

CNT Outputs Ch.2

Maximum subindex

UINT8

RO

0x11 (17dec)

7010:01

Enable output functions

The internal functions for the output are enabled via this bit

BOOLEAN

RO

0x00 (0dec)

7010:02

Set output

Set output

BOOLEAN

RO

0x00 (0dec)

7010:03

Set counter

Set counter

BOOLEAN

RO

0x00 (0dec)

7010:04

Inhibit counter

The counter is stopped as long as this bit is active. The previous counter state is retained.

BOOLEAN

RO

0x00 (0dec)

7010:11

Set counter value

This is the counter value to be set via “Set counter” (index 0x7010:03).

UINT32

RO

0x00000000

(0dec)
Index 7020 CNT Outputs
Index (hex) Name Meaning Data type Flags Default

7020:0

CNT Outputs

Maximum subindex

UINT8

RO

0x11 (17dec)

7020:01

Enable output functions

The internal functions for the output are enabled via this bit

BOOLEAN

RO

0x00 (0dec)

7020:02

Set output

Set output

BOOLEAN

RO

0x00 (0dec)

7020:03

Set counter

Set counter

BOOLEAN

RO

0x00 (0dec)

7020:04

Inhibit counter

The counter is stopped as long as this bit is active. The previous counter state is retained.

BOOLEAN

RO

0x00 (0dec)

7020:11

Set counter value

This is the counter value to be set via “Set counter” (index 0x7020:03).

UINT32

RO

0x00000000

(0dec)
Index F000 Modular device profile
Index (hex) Name Meaning Data type Flags Default

F000:0

Modular device profile

General information for the modular device profile

UINT8

RO

0x02 (2dec)

F000:01

Module index distance

Index spacing of the objects of the individual channels

UINT16

RO

0x0010 (16dec)

F000:02

Maximum number of modules

Number of channels

UINT16

RO

0x0003 (3dec)
Index F008 Code word
Index (hex) Name Meaning Data type Flags Default

F008:0*

Code word

NoCoeStorage function:

The input code of the code word 0x12345678 activates the NoCoeStorage function:

Changes to the CoE directory are not saved if the function is active. The function is deactivated by: 1.) changing the code word or 2.) restarting the terminal.

UINT32

RW

0x00000000

(0dec)

* Function NoCoeStorage from Firmware 03


  • Code word

    The vendor reserves the authority for the basic calibration of the terminals. The code word is therefore at present reserved.

Index F010 Module list
Index (hex) Name Meaning Data type Flags Default

F010:0

Module list

Maximum subindex

UINT8

RO

0x03 (3dec)

F010:01

SubIndex 001

reserved

UINT16

RO

0x0096

(150dec)

F010:02

SubIndex 002

reserved

UINT16

RO

0x0096

(150dec)

F010:03

SubIndex 003

reserved

UINT16

RO

0x0096

(150dec)

Technical Data

Technical Data

AKT2G-DN-002-000
Number of counters 1 or 2
Rated voltage 24 VDC (-15%/+20%)
Signal voltage “0” -3 V ... 5 V (EN 61131-2, type 1)
Signal voltage “1” 15 V ... 30 V (EN 61131-2, type 1)
Counting frequency 100 kHz
Counter depth 32 bit
Input current typ. 5 mA (EN 61131-2, type 1)
Output current (per channel) max. 0.5 A (short-circuit-proof)
Distributed Clocks (DC) yes
Current consumption power contacts typ. 14 mA + load
Current consumption via E-bus typ. 130 mA
Electrical isolation 500 V (E-bus/field voltage)
Supports NoCoeStorage function yes
Weight approx. 50 g
Permissible ambient temperature range during operation -25°C ... +60°C (extended temperature range)
Permissible ambient temperature range during storage -40°C ... +85°C
Permissible relative humidity 95%, no condensation
Dimensions (W x H x D) approx. 15 mm x 100 mm x 70 mm
Mounting on 35 mm mounting rail conforms to EN 60715
Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27, see also Mounting and Wiring of I/O Terminals
EMC immunity/emission conforms to EN 61000-6-2 / EN 61000-6-4
Protection class IP20
Installation position variable
Approval CE ATEX, cULus