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USER MANUAL DP2302 IFM
Operating instructions
Counter
DP2302
Contents
1 Preliminary note.... 4
1.1 Symbols used.... 4
1.2 Warnings.... 4
1.3 Safety symbol on the device 4
2 Safety instructions 5
3 Transport, handling and storage 6
4 Intended use 7
4.1 Supported sensors 7
5 Function 8
5.1 Application as an IO-Link device.... 8
5.1.1 General information.... 8
5.1.2 Application example 8
5.1.3 IO Device Description (IODD) 8
5.2 Standard IO wiring 9
5.3 Function diagrams (counting behaviour) 9
5.3.1 Up counter (InC) 9
5.3.2 Down counter (dEC) 10
5.3.3 Counting direction control by IN2 (dLr) 10
5.4 Function diagrams (output behaviour) 11
5.4.1 Single point mode 11
5.4.2 Window mode 12
5.4.3 Deactivated mode 12
5.4.4 Latch mode.... 12
5.4.5 Standard IO mode.... 13
5.5 Scaling of the counters.... 14
6 Installation.... 15
7 Electrical connection 16
7.1 Input side 16
7.2 Connecting the device.... 16
7.2.1 Mounting the connector 17
7.2.1.1 Maximum cable length 17
8 Operating and display elements.... 18
8.1 Push rings (pushbuttons).... 18
8.2 LEDs 18
8.3 Display 19
9 Menu.... 20
9.1 General 20
9.2 Menu structure.... 21
9.3 Parameters of the main menu.... 21
9.3.1 dln1 - counter configuration 1 21
9.3.2 dln2 - counter configuration 2 22
9.3.3 SSC1 – main counter OUT1.... 22
9.3.4 SSC2 - batch counter OUT2 22
9.3.5 EF - extended functions.... 22
9.4 Parameters for OUT1 (SSC1 / main counter / cnt) 22
9.4.1 ModE - switch point mode 22
9.4.2 LoGc - switch point logic 22
9.4.3 SP1 – switch point 1 23
9.4.4 SP2-switch point 2 23
9.4.5 PST – initial value of the counter 23
9.4.6 c.nu / c.dno - scaling factor for the main counter 23
9.4.7 dr-switch-off delay 23
9.4.8 P-n - output configuration 23
9.5 Parameters for OUT2 (SSC2 / batch counter / bcnt).... 24
9.5.1 ModE - switch point mode 24
9.5.2 LoGc - switch point logic 24
9.5.3 SP1 – switch point 1 24
9.5.4 SP2-switch point 2 24
9.5.5 PST.b – initial value of the counter 24
9.5.6 b.nu / b.dno - scaling factor for the batch counter.... 24
9.5.7 dr-switch-off delay 24
9.6 Parameters of the extended functions (EF) 24
9.6.1 SELd - selection of the primary counter 24
9.6.2 dAP - switching delay for debouncing the input 25
9.6.3 coLr - display colours 25
9.6.4 diS.b – display power on 25
9.6.5 diS. U – refresh rate of the displayed measured value 25
9.6.6 LTC1-latch 25
9.6.7 rES - restore factory setting 25
9.7 Parameters adjustable via IO-Link 26
9.7.1 RESET_COUNTER - reset main counter 26
9.7.2 RESET_BATCH_COUNTER - reset batch counter 26
9.7.3 RELEASE_LATCH_COUNTER - release latch of the main counter 26
9.7.4 RELEASE_LATCH_BATCH_COUNTER - release latch of the batch counter 26
9.7.5 FLASH_ON – activate flashing of the display 26
9.7.6 FLASH_OFF – deactivate flashing of the display 26
9.7.7 internal_temperature – operating temperature microcontroller 26
9.7.8 operation_hours – operating hours 26
9.7.9 Application-specific tag 27
9.7.10 Location tag 27
9.7.11 Function tag 27
10 Parameter setting 28
10.1 Parameter setting in general.... 28
10.1.1 Example [ModE] - switch point mode for OUT2 28
10.2 Notes on programming.... 29
10.2.1 Locking / unlocking 29
10.2.2 Timeout.... 29
10.2.3 Numerical entries with [▼] or [▲].... 29
11 Operation 30
12 Troubleshooting.... 31
13 Maintenance, repair and disposal 32
14 Factory settings.... 33
1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the unit / packaging or at documentation.ifm.com.
1.1 Symbols used
Requirement
Instruction
Reaction, result
bold Designation of keys, buttons or indications
→ Cross-reference without link
→ Cross-reference with link


Important note
Non-compliance may result in malfunction or interference
Information
Supplementary note
1.2 Warnings
Warnings indicate the possibility of personal injury and damage to property. This enables safe product handling. Warnings are graded as follows:

WARNING
Warning of serious personal injury
▷ If the warning is not observed, fatal and serious injuries are possible.

CAUTION
Warning of minor to moderate personal injury
▷ If the warning is not observed, minor to moderate injuries are possible.

ATTENTION
Warning of damage to property
▷ If the warning is not observed, damage to property is possible.
1.3 Safety symbol on the device

Safety symbol on the device:
▶ Adhere to the operating instructions for the safe operation of the unit.
2 Safety instructions
- The unit described is a subcomponent for integration into a system.
- The system architect is responsible for the safety of the system.
-
The system architect undertakes to perform a risk assessment and to create documentation in accordance with legal and normative requirements to be provided to the operator and user of the system. This documentation must contain all necessary information and safety instructions for the operator, the user and, if applicable, for any service personnel authorised by the architect of the system.
-
Read this document before setting up the product and keep it during the entire service life.
- The product must be suitable for the corresponding applications and environmental conditions without any restrictions.
- Only use the product for its intended purpose (→ Intended use).
- If the operating instructions or the technical data are not adhered to, personal injury and/or damage to property may occur.
- The manufacturer assumes no liability or warranty for any consequences caused by tampering with the product or incorrect use by the operator.
- Installation, electrical connection, set-up, programming, configuration, operation and maintenance of the product must be carried out by personnel qualified and authorised for the respective activity.
- Protect units and cables against damage.
- Replace damaged units, otherwise the technical data and safety will be impaired.
- Observe applicable documents.
3 Transport, handling and storage
▶ Store the device in its original packaging.
▶ When the device is to be stored again, use the original packaging.
▶ Otherwise, provide unused connections with either a mating connector or a protective cap and pack the device in suitable packaging.
▶ Observe the permissible ambient conditions for the device during storage (→ Technical data).
4 Intended use
The device is a pulse evaluation system. It can, for example, count any objects on receiving the pulses from external sensors and counting the number of pulses. This value is compared with the set switch points; the outputs are switched in accordance with the set parameters. Scaling factors allow for flexible setting of the increment for each pulse.

Fig. 1: Example: Counting sealed bottles on a conveyor belt
1: Conveyor belt
3: DP2302
5: Transistor output / IO-Link
2: Counting pulse generator on the conveyor belt
4: Transistor output (e.g. to control a light indicator, horn, relay or fieldbus I/O device Profinet/AS-i etc.)
6: Signals depending on the selected switching function

The unit is not suited for environments with particular requirements on mechanical stability (e.g. shock/vibration).
The unit is intended for indoor use only.
▶ Observe the operating conditions (→ Technical data at www.ifm.com).
4.1 Supported sensors
Any suitable 3- and 2-wire sensors (e.g. inductive, optical, etc) are supported. The sensors must meet the following requirements:
- PNP switching
• compatibility with 24 V supply voltage

The mark-to-space ratios of the sensor used must be taken into account.
5 Function
The device supports three adjustable counting modes. The counter can be permanently defined as an up counter or as a down counter or be flexibly switched between up and down counter via IN2: Function diagrams (counting behaviour) ➕ 9. A display indicates the current counter reading. The device generates output signals according to the parameter setting. Moreover, it provides the process data via IO-Link.
The device is designed for half-duplex communication. So the following options are possible:
- Remote display: reading and displaying the current counter readings
- Remote parameter setting: reading and changing the current parameter setting
• IO-Link parameter setting: IO Device Description (IODD) → 8
5.1 Application as an IO-Link device
5.1.1 General information
The unit has an IO-Link communication interface which requires an IO-Link capable module (IO-Link master).
The IO-Link interface allows direct access to the process and diagnostic data and enables setting of the parameters of the unit during operation.
You will find further information about IO-Link and all the necessary information about the required IO-Link hardware and software at:
www.io-link.ifm
5.1.2 Application example

Fig. 2: Application example with IO-Link master
1: Conveyor belt and counting pulse generator
2: Counter
3: Fully bidirectional IO-Link communication - remote parameter setting: reading and changing the parameter setting
4: IO-Link master
5: Fieldbus (e.g. Profibus, Profinet, AS-i etc.)
6: PLC
5.1.3 IO Device Description (IODD)
You will find the IODDs required for configuration of the IO-Link device as well as detailed information about the process data structure, diagnostic information and parameter addresses at documentation.ifm.com
5.2 Standard IO wiring
Switch points (standard IO mode) can also be used in combination with the standard inputs of a PLC. OUT1 and OUT2 can be switched to digital inputs (e.g. standard input modules). OUT1 and OUT2 can be evaluated via two digital inputs and implement a window function.
Voltage supply (pin 1 and 3) can be done via the input modules. With standard input modules, pins 1 and 3 are used for voltage supply (→ Electrical connection).

Fig. 3: Application example with a fieldbus system (e.g. AS-i)
1: Conveyor belt and counting pulse generator
3: Digital outputs
5: Fieldbus (e.g. Profibus, Profinet, AS-i etc.)
2: Counter
4: Digital fieldbus module
6: PLC
5.3 Function diagrams (counting behaviour)
The counting direction is set via the parameter dln1 and, in case of counting direction control by IN2, via dln2.
5.3.1 Up counter (InC)

A: overflow
• Overflow condition: current counter value >= maximum permissible counter value
- The maximum permissible counter value depends on the switch point mode.
- If during overflow the counter value is equal to the maximum permissible counter value, the counter is immediately reset to 0.
- If during overflow the counter value is greater than the maximum permissible counter value, the counter is immediately reset to the resulting positive amount.
5.3.2 Down counter (dEC)
Counter reading (main counter)
Counter reading (batch counter)

A: maximum counter value
B: underflow
• Underflow condition: current counter value < 0
- The maximum permissible counter value depends on the switch point mode.
- Upon triggering of an underflow, the counter is immediately reset to the maximum permissible counter value minus the negative amount.
5.3.3 Counting direction control by IN2 (dLr)
Counter reading (main counter)
Counter reading (batch counter)

A: overflow
B: underflow
• Overflow condition: current counter value >= maximum permissible counter value
• Underflow condition: current counter value < 0
- The maximum permissible counter value depends on the switch point mode.
- If during overflow the counter value is equal to the maximum permissible counter value, the counter is immediately reset to 0.
- If during overflow the counter value is greater than the maximum permissible counter value, the counter is immediately reset to the resulting positive amount.
- Upon triggering of an underflow, the counter is immediately reset to the maximum permissible counter value minus the negative amount.
| dIn1 | dIn2 | IN2 = low | IN2 = high |
| dLr | InC | Up counter | Down counter |
| dLr | dEC | Down counter | Up counter |
Tab. 1: Counting direction control
5.4 Function diagrams (output behaviour)
Function diagram display is based on the up counter. The down counter and the counter with flexible counting direction behave in the same way.
5.4.1 Single point mode
When the set switching value is reached, the output is set, in accordance with the counter (main and/or batch counter), for the time of the switch-off delay. After expiry of the switch-off delay, the output resets automatically. During the delay, the input signals continue to be evaluated without restrictions.
Counter reading

Fig. 4: NO (IO-Link parameter LoGc: no / high active)
SP1: switch-on point / maximum value of the counter
x: integer rounded up value of the set scaling factor: c.nu / c.dno - scaling factor for the main counter 23
dr: switch-off delay: dr — switch-off delay ➞ 23
If a counter value is exceeded, this is signalled by the switching signal as closed.
Counter reading

Fig. 5: NC (IO-Link parameter LoGc: nc / low active)
SP1: switch-off point / maximum value of the counter
x: integer rounded up value of the set scaling factor: c.nu / c.dno - scaling factor for the main counter 23
dr: switch-off delay: dr - switch-off delay 23
If a counter value is exceeded, this is signalled by the switching signal as open.
5.4.2 Window mode
Counter reading

Fig. 6: NO (IO-Link parameter LoGc: no / high active)
SP1: switch-off point window
x: integer rounded up value of the set scaling factor: c.nu / c.dno - scaling factor for the main counter 23
SP2: switch-on point window
If a counter value is not reached, this is signalled by the switching signal as open.
Counter reading

Fig. 7: NC (IO-Link parameter LoGc: nc / low active)
SP1: switch-on point window
x: integer rounded up value of the set scaling factor: c.nu / c.dno - scaling factor for the main counter 23
SP2: switch-off point window
If a counter value is exceeded, this is signalled by the switching signal as open.
5.4.3 Deactivated mode
NO (IO-Link parameter LoGc: no / high active)
The switching signal is always signalled as open.
NC (IO-Link parameter LoGc: nc / low active)
The switching signal is always signalled as closed.

Maximum value of the main counter (SSC1) = 1,000,000
Maximum value of the batch counter (SSC2) = 9,999
5.4.4 Latch mode
After activating the latch mode, the output is permanently set when the overflow or underflow value is reached and must be actively reset. As long as the output is set, evaluation of the input signals is deactivated.
Latch mode can only be activated if
- the device is configured as an up counter (dIn=InC) or a down counter (dIn=dEC) only.
- the parameter LTC1 is set to the desired counter.
- the corresponding counter (main or batch counter) is operated in single point mode.

The setting under LTC1 is ignored as soon as one of the specified conditions is not fulfilled.
The output can only be released by the following measures:
- PDO: To the rising edge of the PDO bits “Release_Latch_Counter” or “Release_Latch_Batch_Counter”.
- IO-Link: system command "RELEASE_LATCH_COUNTER" or "RELEASE_LATCH_BATCH_COUNTER"
Parameters adjustable via IO-Link ➕ 26
• Standard IO: rising edge signal at IN2
Counter reading

Fig. 8: NO (IO-Link parameter LoGc: no / high active)
SP1: switch-on point / maximum value of the counter
x: integer rounded up value of the set scaling factor:
c.nu / c.dno - scaling factor for the main counter ➕ 23
If a counter value is exceeded, this is signalled by the switching signal as closed.
Counter reading

Fig. 9: NC (IO-Link parameter LoGc: nc / low active)
SP1: switch-off point / maximum value of the counter
x: integer rounded up value of the set scaling factor:
c.nu / c.dno - scaling factor for the main counter ➞ 23
If a counter value is exceeded, this is signalled by the switching signal as open.
5.4.5 Standard IO mode
The yellow LEDs indicate the switching status of the device.
Switching function NO:
| Transistor output | LED yellow | Description |
| closed | on | counter reading ≥ SP1 |
| open | off | counter reading < SP1 |
Switching function NC:
| Transistor output | LED yellow | Description |
| closed | on | counter reading < SP1 |
| open | off | counter reading ≥ SP1 |
5.5 Scaling of the counters
The scaling of the counters is configured via c.nu and c.dno (main counter) or b.nu and b.dno (batch counter), with *.nu indicating the value by which the corresponding counter is to be increased in *.dno steps.
The counters only count in whole numbers. In case of non-integer ratios of *.nu/*.dno, the non-integer residual value is stored and taken into account in the next counting step.
| c.nu = 5; c.dno = 4 | c.nu = 2; c.dno = 5 | |||
| Counting step | Theoretical counter reading | Current counter reading | Theoretical counter reading | Current counter reading |
| 0 | 0 | 0 | 0 | 0 |
| 1 | 1.25 | 1 | 0.4 | 0 |
| 2 | 2.5 | 2 | 0.8 | 0 |
| 3 | 3.75 | 3 | 1.2 | 1 |
| 4 | 5 | 5 | 1.6 | 1 |
| 5 | 6.25 | 6 | 2 | 2 |
Tab. 2: Examples
Calculation formula:
z _ n = . nu + r _ n - 1. dno = c _ n * . dno . dno + r _ n. dno
r _ n = ^ . nu + r _ n - 1 - c _ n ^ . no
zn : Theoretical count value with decimal place in counting step n
cn : Number of increments (increase/decrease) in counting step n
rn : Non-integer share in counting step n; is taken into account in the next counting step

The maximum limit of the scaling factor is SP1.
6 Installation
▶ Install the device so that the M12 connection parts and the device are protected from mechanical stress such as shock and vibration.
▶ If necessary, fix the device with a mounting clip. Use M4 screw or cable tie for this purpose.
▶ During installation, ensure that the pollution degree is 2 or better.

Fig. 10: Mounting clip

Fig. 11: Mounting clip with attached unit

The mounting clip is not supplied with the device. More information about available accessories at www.ifm.com.

The following applies to all types of mounting:
The responsibility for the compliance with the requirements concerning mounting of the device in the application with regard to shock, vibration, acceleration and weight lies with the system architect.
7 Electrical connection

The unit must be connected by a qualified electrician.
▶ Observe the national and international regulations for the installation of electrical equipment.
The input and output circuits are insulated from each other and from device surfaces that could be touched with basic insulation according to IEC 61010-1 (secondary circuit with max. 32 V DC, supplied from the mains circuit up to 300 V of overvoltage category II).
The external wiring has to be carried out in a way that ensures the required separation from other circuits.
7.1 Input side
Operating voltage (SELV/PELV)

CAUTION
The input current of the operating voltage is not limited.
▷ No fire protection.
▶ Protect the circuit.
▶ Protect the sensor supply via the same fuse.
| Potential | M12 connector 1 | Fuse |
| L+ / supply voltage | Pin 1 | ≤ 2 A |
Required tripping characteristic of the fuse:
Tfuse ≤ 120 s at max. 6.25 A (fire protection)
▶ Alternatively supply the device via a limited energy circuit according to IEC 61010-1 or class 2 according to UL1310.

Output reaction to overload or short circuit:
For self-protection of the output in case of excessive thermal load (due to short circuit or overload), the output driver starts clocking. If a short circuit / overload continues for several hours, the driver may be damaged!
7.2 Connecting the device
▶ Disconnect power.
▶ Connect the unit as follows:

Fig. 12: Electrical connection
1: 4-pole M12 connector
• Pin 1: L+ / supply voltage
• Pin 2: OUT2 / digital output 2
• Pin 3: L- / supply voltage
• Pin 4: OUT1 / digital output 1/ IO-Link (C/Q)
2: 5-pole M12 socket
- Pin 1: L+
• Pin 2: IN2 / digital input 2 - Pin 3: L-
• Pin 4: IN1 / digital input 1 - Pin 5: not connected

The device must not be externally supplied via the 5-pole M12 socket ②.

Always use the provided connection cables to connect other devices.
See also application examples (→ Intended use)
7.2.1 Mounting the connector
The threaded connections in the device correspond to the M12 standard. To ensure compliance with the specified protection rating, only cables that comply with this standard may be used. In the case of self-assembled cables, the system manufacturer is responsible for the protection rating.
▶ Use connectors with gold-plated contacts.
▶ During installation, place the connectors vertically so that the coupling nut will not damage the thread.
▶ Observe the coding of the connectors during installation.
If connector in the device:
▶ Tighten the cable sockets according to the torque specifications indicated by the cable vendor. Maximum permissible tightening torque: 1.8 Nm
If sockets in the device:
▶ Tighten the cable plug using 1.3 ± 0.1 Nm.
▶ Provide all outgoing cables with suitable strain relief after a maximum of 200 mm. Observe the minimum bending radius of the cables (⇨ information from the cable manufacturer).
7.2.1.1 Maximum cable length
• Without IO-Link communication: 30 m on each side
• With IO-Link communication: 20 m on the master side
8 Operating and display elements

1: Push rings (pushbuttons)
2: LEDs
3: Display

Here, the Enter button ● is shown pressed, as an example.
8.1 Push rings (pushbuttons)
To execute an esc, ●, ▼ or ▲ command, press the corresponding corner of a push ring.
| Button | Function | |
| esc | Escape | Return to the previous menu. Exit parameter setting without saving the new value. |
| ● | Enter | Open menu mode. Selection of the parameter and acknowledgement of a parameter value. |
| ▼ | Down | Selection of a parameter. Setting a parameter value (scrolling by holding down, incrementally by pressing repeatedly). |
| ▲ | Up | |

To ensure correct operation of the push rings (buttons), do not install or place the unit directly on a metal surface.
For the installation use the mounting clip ➕ Installation.
8.2 LEDs
| LED | Colour | Status | Designation | |
| I | OUT1 | yellow | on | Output 1 switched. |
| Power | green | on | Voltage supply OK. Unit in operating mode. | |
| off | Unit in programming mode. | |||
| II | OUT2 | yellow | on | Output 2 switched. |
Error signals and diagnosis: Troubleshooting ➞ 31
8.3 Display
| Colour | Designation |
| Red/green | 7-segment LED display, 4 digits, with colour change |
Error signals and diagnostics: ➕ Troubleshooting
In operating mode, the counter reading is displayed.
If ▼ or ▲ is pressed for 1 second during operating mode, the designation of the standard counter, the counter reading of the secondary counter and the designation of the secondary counter are displayed one after the other. The designation and the counter reading of a counter are displayed in the same colour.
More information: SELd – selection of the primary counter → 24 and coLr – display colours → 25.
9 Menu
9.1 General
Irrespective of the operating mode (standard IO mode or IO-Link device) there are two options to set the parameters of the device:
- directly on the device via the menu (→ Parameter setting)
• or via an IO-Link tool
Access via an IO-Link tool has a higher priority than parameter setting via the menu.

Parameter cloning and parameter setting backup is possible with an IO-Link tool.

Some parameters can only be set via the IO-Link interface:
Parameters adjustable via IO-Link ➕ 26.

If the device was locked via IO-Link, it can also only be unlocked via the IO-Link interface:
Locking / unlocking ➕ 29.
9.2 Menu structure

Fig. 13: Parameter
1: Operating mode: Menu ➕ 20
2: Main menu: Parameters of the main menu ➕ 21
and extended functions: Parameters of the extended functions (EF) ➕ 24
Parameter list and factory settings: Factory settings ➕ 33
9.3 Parameters of the main menu
9.3.1 dIn1 - counter configuration 1
The parameter defines the counting mode of the counters:
• InC = Up counter: Up counter (InC) → 9
- dEC = Down counter: Down counter (dEC) → 10
- dLr = Switching of counting direction possible via IN2: Counting direction control by IN2 (dLr) → 10
• OFF = Counting function deactivated - rES. C = Reset the counters to initial values: PST – initial value of the counter → 23

After pressing rES. C, the setting of dln1 is automatically reset to the last active setting.
9.3.2 dIn2 - counter configuration 2
The parameter defines the counting direction of the counters if dIn1 is set to dLr. The counting direction can be changed by the input signal at IN2 during operation.
| Options | IN2 = low | IN2 = high |
| InC | Up counter | Down counter |
| dEC | Down counter | Up counter |

dIn2 is only active if dIn1 is set to dLr.
9.3.3 SSC1 – main counter OUT1
The parameter opens the menu of the settings for OUT1 of the counter (main counter).
9.3.4 SSC2 – batch counter OUT2
The parameter opens the menu of the settings for OUT2 of the counter (batch counter).
9.3.5 EF - extended functions
The parameter opens the extended functions menu.
9.4 Parameters for OUT1 (SSC1 / main counter / cnt)
9.4.1 ModE – switch point mode
Setting of the switch point mode.
• 1-P = single point mode: Single point mode → 11
- und = window mode: Window mode → 12
- OFF = deactivated mode: Deactivated mode → 12
9.4.2 LoGc - switch point logic
Setting of the switch point logic: Function diagrams (output behaviour) → 11.
- no = switch is closed when activated.
- nc = switch is opened when activated.
9.4.3 SP1 – switch point 1
Permissible maximum value of the counter.
In “Single point mode” SP1 is adjustable over its entire value range. In “Window mode” the lower limit is restricted by SP2.
It always applies: SP1 > SP2.
SP1 must be greater than PST.

Set SP2 to an integer multiple of the scaling factor.
Otherwise, the overflow only occurs after SP2 has been exceeded.
9.4.4 SP2 – switch point 2
Count value for setting of the output.
Only active in “Window Mode” switch point mode.
In “Single point mode” the existing setting of SP2 is ignored. When changing to “Window mode”, SP2 is automatically adjusted.
It always applies: SP2 < SP1.
SP1 limits the maximum setting value of SP2.

Set SP1 to an integer multiple of the scaling factor.
Otherwise, the overflow only occurs after SP1 has been exceeded. The difference between the real value and SP1 is taken into account in the following counting step.
9.4.5 PST – initial value of the counter
The parameter defines the value to which the counter is to be reset when executing rES. C (dIn1 - counter configuration 1 → 21) or the system command "RESET_COUNTER".
It always applies: PST < SP1.
9.4.6 c.nu / c.dno - scaling factor for the main counter
The scaling factor is composed of the numerator c.nu and the denominator c.dno and defines the main counter's increment.

If the scaling factor is odd, the counter reading is rounded down to an integer value. The resulting deviation between the displayed and the actual counter reading is taken into account in the following counting step.
9.4.7 dr - switch-off delay
Delay when the output changes to the idle state.
9.4.8 P-n - output configuration
- PnP = load connected to ground
• nPn = load connected to VBB
9.5 Parameters for OUT2 (SSC2 / batch counter / bcnt)
9.5.1 ModE – switch point mode
Identical to SSC1: ModE – switch point mode ➕ 22
9.5.2 LoGc - switch point logic
Identical to SSC1: LoGc – switch point logic ➞ 22
9.5.3 SP1 – switch point 1
Identical to SSC1: SP1 – switch point 1 ➞ 23
9.5.4 SP2 – switch point 2
Identical to SSC1: SP2 – switch point 2 ➞ 23
9.5.5 PST.b – initial value of the counter
The parameter defines the value to which the counter is to be reset when executing rES. C (dIn1 - counter configuration 1 → 21) or the system command "RESET_BATCH_COUNTER".
9.5.6 b.nu / b.dno – scaling factor for the batch counter
Identical to SSC1 (but with regard to the batch counter): c.nu / c.dno - scaling factor for the main counter 23
9.5.7 dr - switch-off delay
Identical to SSC1: dr — switch-off delay ➕ 23
9.6 Parameters of the extended functions (EF)
9.6.1 SELd – selection of the primary counter
The parameter defines which counter is permanently shown on the display.
- cnt = main counter
- bcnt = batch counter
For quick display of the secondary counter: Push rings (pushbuttons) ➞ 18.
9.6.2 dAP – switching delay for debouncing the input
Delays the change of the output from the idle state to the active switching status.
9.6.3 coLr – display colours
- rEd = Primary counter / menu continuously red (independent of the measured value)
- GrEn = Primary counter / menu continuously green (independent of the measured value)

The secondary counter is automatically displayed with the colour that differs from the primary counter.
9.6.4 diS.b – display power on
- OFF = the measured value display is switched off in the operating mode.
- On = the measured value display is switched on in the operating mode.

Press any button to activate the display for at least 30 s in the switched-off state.
9.6.5 diS. U – refresh rate of the displayed measured value
- d1 = update of the measured values every 50 ms.
- d2 = update of the measured values every 200 ms.
- d3 = update of the measured values every 600 ms.

Even with an unsteady frequency, d1 provides optimum readability.
9.6.6 LTC1 – latch
The parameter activates the latch mode for the main or batch counter. When deactivated, the switch-off delay automatically takes effect: dr — switch-off delay ➕ 23.
• OFF = Latch mode deactivated
- cnt = Latch mode on output of the main counter
- bcnt = Latch mode on output of the batch counter
9.6.7 rES – restore factory setting
Resets all parameters to the Factory settings ➞ 33.
▶ Select rES.
▶ Press ●.
▶ Press and hold ▲ or ▼ until ---- is displayed.
▶ Briefly press ●.
9.7 Parameters adjustable via IO-Link
The following functions or parameters are only available via IO-Link tools.
9.7.1 RESET_COUNTER – reset main counter
The main counter is reset to its initial value: PST – initial value of the counter ➞ 23.

If the counter is in latch, it must be released separately via "RELEASE_LATCH_COUNTER".
9.7.2 RESET_BATCH_COUNTER – reset batch counter
The batch counter is reset to its initial value: PST.b - initial value of the counter 24.

If the counter is in latch, it must be released separately via "RELEASE_LATCH_BATCH_COUNTER".
9.7.3 RELEASE_LATCH_COUNTER - release latch of the main counter
If the main counter is in latch, execution of this parameter resumes input signal evaluation.
9.7.4 RELEASE_LATCH_BATCH_COUNTER - release latch of the batch counter
If the batch counter is in latch, execution of this parameter resumes input signal evaluation.
9.7.5 FLASH_ON – activate flashing of the display
Used to identify a unit. Display flashes and shows dEVC.
9.7.6 FLASH_OFF – deactivate flashing of the display
Deactivates the flashing of the display.
9.7.7 internal_temperature – operating temperature microcontroller
Reads the data from the internal temperature sensor of the microcontroller.
9.7.8 operation_hours – operating hours
Only counts full operating hours. Operating times of less than one full hour are not saved. Counter readings are saved permanently.
9.7.9 Application-specific tag
Customer-specific application description, max. 32 characters long.
Default value: “ *** ” / can be freely defined by the customer
9.7.10 Location tag
Customer-specific location tag of the unit, max. 32 characters long.
Default value: “ *** ” / can be freely defined by the customer
9.7.11 Function tag
Customer-specific function tag of the unit, max. 32 characters long.
Default value: “ *** ” / can be freely defined by the customer
10 Parameter setting

During parameter setting the unit remains in the operating mode. It continues its monitoring functions with the existing parameters until the parameter setting has been completed.
10.1 Parameter setting in general
Each parameter setting consists of 6 steps:
| Step | Button | |
| 1 | Change from operating mode to parameter setting mode. | ● |
| 2 | Select the required parameter: [SP1], [dr], ... | ▲ or ▼ |
| 3 | Change to the programming mode of the parameter. | ● |
| 4 | Select or change the parameter value. | ▲ or ▼ > 2 s |
| 5 | Acknowledge the set parameter value. | ● |
| 6 | Return to the operating mode. | esc |
10.1.1 Example [ModE] - switch point mode for OUT2
| Step | Display | |
| 1 | Change from operating mode to parameter setting mode. | |
| ► ▶ Press ● to get to the menu. ▷ The first parameter is displayed. | ![]() | |
| 2 | Select the requested parameter, here SSC2. | |
| ► ▶ Press ▼ until SSC2 is displayed.► ▶ Press ● to get to the extended functions menu. ▷ The first parameter of the extended functions is displayed. | ![]() ![]() | |
| 3 | Change to the programming mode of the parameter. | |
| ► ▶ Press ● to change to the programming mode. ▷ The currently set parameter value is displayed. | ![]() | |
| 4 | Select or change the parameter value, here e.g. und. | |
| ► ▶ Press ▼ or ▲ for at least 2 s. ▷ The currently set parameter value flashes, here e.g. 1-P. ▷ After 2 s:- value is changed continuously by keeping the button pressed.- value is changed incrementally by pressing the button once. Numerical values (→9.2.3) | ![]() ![]() | |
| 5 | Acknowledge the set parameter value. | |
| ► ▶ Briefly press ●. ▷ The parameter is displayed again. ▷ The new setting value is saved. | ![]() | |
| Setting of other parameters:► ▶ Press ▼ or ▲ until the requested parameter is displayed. | ||
| 6 | Return to the operating mode. | |
| ▸ ▶ Press esc.▸ ▶ - Press ▼ or ▲ several times until the current measured value is displayed.- Or wait for the timeout function (approx. 30 s).▸ ▷ The unit has returned to the operating mode.▸ ▷ The current value is displayed. | ![]() | |
10.2 Notes on programming
10.2.1 Locking / unlocking
The unit can be locked electronically to prevent unauthorised setting. Set parameter values and settings can be displayed but not changed.
To lock the unit:
▶ Make sure that the unit is in normal operating mode.
▶ Press esc + ▲ simultaneously for 10 s.
▷ Loc is displayed.
▷ The unit is locked.
▷ Loc is briefly displayed if you try to change parameter values.
To unlock the unit:
▶ Press esc + ▲ simultaneously for 10 s.
▷ uLoc is displayed.
On delivery the unit is not locked.

Customer locking
If C. Loc is displayed when an attempt is made to modify a parameter value, an IO-Link communication is active (temporary locking).

Software locking
If S. Loc is displayed, the sensor is permanently locked via software. This locking can only be removed using an IO-Link parameter setting software.
10.2.2 Timeout
If no button is pressed for 30 s during parameter setting, the unit returns to the operating mode with the unchanged value.
10.2.3 Numerical entries with [▼] or [▲]
▶ Press ▼ or ▲ for at least 2 s.
▷ After 2 s:
- value is changed continuously by keeping the button pressed.
- value is changed incrementally by pressing the button once.
Value is incrementally reduced with ▼ and increased with ▲.
11 Operation
After power on, the unit is in the operating mode (SIO). It carries out its measurement and evaluation functions and provides output signals according to the set parameters: Menu ➕ 20.
12 Troubleshooting
| Display | LED | Error | Troubleshooting | ||
| I | Power | II | |||
| OFF | off | off | off | Supply voltage too low. | Check/correct the supply voltage: Electrical connection. |
| SC | flashes | any | flashes | Excessive current at the switching output OUTx (see LED I/II). | Check switching output for short circuit or excessive current. Remove the fault. |
| C. Loc | any | any | any | Parameter setting via pushbuttons locked due to active IO-Link transmission. | Wait until parameter setting via IO-Link is finished. |
| S. Loc | any | any | any | Parameter setting via pushbuttons disabled by software. | Unlocking only possible via IO-Link interface/IO-Link parameter setting software. |
| Loc | any | any | any | Parameter setting via pushbuttons disabled. | Unlock pushbuttons: Locking / unlocking 29. |
| d_OL | any | on | any | Count value for the display too high (from counter readings >9999). | Check the value range if the value should be readable on the display. |
| F_OL | any | on | any | Frequency of the input signal too high. | Check the frequency of the input signal. |
| Rotating segment | any | any | any | Temperature in housing exceeds limit value. | Press any button to switch the display on for 30 s. |
| DEUC | any | on | any | Device identification activated (system command: FLASH_ON) | Deactivate device identification (system command: FLASH_OFF) |
13 Maintenance, repair and disposal
Cleaning the unit:
▶ Disconnect the unit from the voltage supply.
▶ Clean the unit from dirt using a soft, chemically untreated and dry micro-fibre cloth.
The operation of the unit is maintenance-free.
Only the manufacturer is allowed to repair the unit.
▶ After use dispose of the device in an environmentally friendly way in accordance with the applicable national regulations.
14 Factory settings
| Parameter | Factory settings | User settings | |
| dIn1 | Counting configuration 1 | InC | • InC• dEC• dLr• OFF• rES. C |
| dIn2 | Counting configuration 2 | InC | • InC• dEC |
| SSC1. ModE | Switch point mode OUT1 | OFF | • 1-P• und• OFF |
| SSC1. LoGc | Switch point logic OUT1 | no | • no• nc |
| SSC1. SP1 | Switch point 1 OUT1 | 120 | |
| SSC1. SP2 | Switch point 2 OUT1 | 60 | |
| PST | Initial value of the main counter | 0 | |
| c.nu | Numerator of the scaling factor for the main counter | 1 | |
| c.dno | Denominator of the scaling factor for the main counter | 1 | |
| SSC1.dr | Switch-off delay OUT1 | 100 ms | |
| P-n | Output configuration | PnP | • PnP• nPn |
| SSC2. ModE | Switch point mode OUT2 | OFF | • 1-P• und• OFF |
| SSC2. LoGc | Switch point logic OUT2 | no | • no• nc |
| SSC2. SP1 | Switch point 1 OUT2 | 24 | |
| SSC2. SP2 | Switch point 2 OUT2 | 12 | |
| PST.b | Initial value of the batch counter | 0 | |
| b.nu | Numerator of the scaling factor for the batch counter | 1 | |
| b.dno | Denominator of the scaling factor for the batch counter | 1 | |
| SSC2.dr | Switch-off delay OUT2 | 100 ms | |
| SELd | Selection of the primary counter | cnt | • cnt• bcnt |
| dAP | Switching delay for de-bouncing the input | 100 μs | |
| coLr | Display: colour setting of the primary counter | rEd | • rEd• GrEn |
| diS.b | Display power on | On | • On• OFF |
| diS. U | Refresh rate of the dis-played value | d1 (50 ms) | • OFF• d1 (50 ms)• d2 (200 ms)• d3 (600 ms) |
| LTC1 | Latch | OFF | • OFF• cnt• bcnt |
| rES | Factory setting | ||
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 1](/content/2026/04/657590/images/531b972ed561df4e7c1395e51b9356054dd29b114bd199b6edc366e7b7b0b485.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 2](/content/2026/04/657590/images/ae40b9eb3221848e6df5a412509931671a77574fee768c1c594c762165b60d15.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 3](/content/2026/04/657590/images/436d4d3ef6adbef78acfb9a2cbcd3abb3c9162965be040b916a92f3af7644c63.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 4](/content/2026/04/657590/images/435cade5de7cf38451720ec9d01348a2742eeba05f0cff9f419a4bcf9fecdf8e.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 5](/content/2026/04/657590/images/6087d27a76680f22180eb968c974d2eaa4b478dcf135843392dc0d951a9fdefe.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 6](/content/2026/04/657590/images/eb655190070ab372acc427df251593807abc6c0b34cf586f5f54fd9d9c501627.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 7](/content/2026/04/657590/images/c7701f1ae909fa57d928a85ca8f5930c9347d8f6fcc7ef2e3a04a9868c6e7076.jpg)
![IFM DP2302 - Example [ModE] - switch point mode for OUT2 - 8](/content/2026/04/657590/images/76066f571941dbf8fba07d040cb7c4cdcb1d3aefcebc94431a3ea9bb2e2b98b1.jpg)