---
title: "Digital IO Control"
slug: "digital-io-control-2-1-1"
updated: 2025-01-07T16:37:55Z
published: 2025-01-07T16:39:30Z
canonical: "docs-linescan.alliedvision.com/digital-io-control-2-1-1"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs-linescan.alliedvision.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Digital IO Control

## Functional scope

This section shows the capabilities of digital IO lines.

### allPIXA evo

This table contains the supported LineMode and LineFormat entries for each supported line.

| **Line** | **LineMode** | **LineFormat** | **Comment** |
| --- | --- | --- | --- |
| Line1 | Input | RS422 |  |
| Line1 | Output | Not Supported | Output mode not supported |
| Line2 | Input | RS422 |  |
| Line2 | Output | Not Supported | Output mode not supported |
| Line3 | Input | SingleEnded_3V3 |  |
| Line3 | Output | SingleEnded_3V3 |  |
| Line4 | Input | SingleEnded_3V3 |  |
| Line4 | Output | SingleEnded_3V3 |  |
| Line5 | Input | SingleEnded_3V3 |  |
| Line5 | Output | SingleEnded_3V3 |  |
| Line6 | Input | SingleEnded_3V3 |  |
| Line6 | Output | SingleEnded_3V3 |  |
| Line7 | Input | SingleEnded_3V3 |  |
| Line7 | Output | SingleEnded_3V3 |  |
| Line8 | Input | SingleEnded_3V3 |  |
| Line8 | Output | SingleEnded_3V3 |  |
| Line9 | Input | SingleEnded_3V3 |  |
| Line9 | Output | SingleEnded_3V3 |  |
| Line10 | Input | Not Supported | Input mode not supported |
| Line10 | Output | Misc |  |
| Line11 | Input | SingleEnded_3V3 |  |
| Line11 | Output | SingleEnded_3V3 |  |

This table contains the supported LineSource entries for each supported line.

| **Line** | **LineSource** |
| --- | --- |
| Line1 | Not Supported |
| Line2 | Not Supported |
| Line3 | Off FrameActive LineActive |
| Line4 | Off FrameActive LineActive |
| Line5 | Off FrameActive LineActive FlashOut1 |
| Line6 | Off FrameActive LineActive FlashOut2 |
| Line7 | Off FrameActive LineActive FlashOut3 |
| Line8 | Off FrameActive LineActive FlashOut4 |
| Line9 | Off FrameActive LineActive MSOut |
| Line10 | Fan |
| Line11 | Off MSOut |

### allPIXA neo

This table contains the supported LineMode and LineFormat entries for each supported line.

| **Line** | **LineMode** | **LineFormat** | **Comment** |
| --- | --- | --- | --- |
| Line1 | Input | RS422 RS422_NoTerm SingleEnded_3V3 SingleEnded_5V SingleEnded_12V SingleEnded_24V |  |
| Line1 | Output | Not Supported | Output mode not supported. |
| Line2 | Input | RS422 RS422_NoTerm SingleEnded_3V3 SingleEnded_5V SingleEnded_12V SingleEnded_24V |  |
| Line2 | Output | Not Supported | Output mode not supported. |
| Line3 | Input | RS422 RS422_NoTerm SingleEnded_3V3 SingleEnded_5V SingleEnded_12V SingleEnded_24V |  |
| Line3 | Output | RS422 SingleEnded_3V3 |  |
| Line4 | Input | RS422 RS422_NoTerm SingleEnded_3V3 SingleEnded_5V SingleEnded_12V SingleEnded_24V |  |
| Line4 | Output | RS422 SingleEnded_3V3 |  |
| Line5 | Input | NoConnect SingleEnded_3V3 |  |
| Line5 | Output | NoConnect SingleEnded_3V3 RS422 |  |
| Line6 | Input | NoConnect SingleEnded_3V3 |  |
| Line6 | Output | NoConnect SingleEnded_3V3 RS422 |  |
| Line7 | Input | NoConnect SingleEnded_3V3 | If Line5 format is configured as RS422 then Line7 is not available. |
| Line7 | Output | NoConnect SingleEnded_3V3 |
| Line8 | Input | NoConnect SingleEnded_3V3 | If Line6 format is configured as RS422 then Line8 is not available. |
| Line8 | Output | NoConnect SingleEnded_3V3 |
| Line9 | Input | Not Supported | Input mode not supported |
| Line9 | Output | Misc |  |

This table contains the supported LineSource entries for each supported line.

| **Line** | **LineSource** |
| --- | --- |
| Line1 | Not Supported |
| Line2 | Not Supported |
| Line3 | Off FrameActive LineActive UserOutput3 LineTrigger FrameTrigger Exposure |
| Line4 | Off FrameActive LineActive UserOutput4 LineTrigger FrameTrigger Exposure |
| Line5 | Off FrameActive LineActive UserOutput5 LineTrigger FrameTrigger Exposure |
| Line6 | Off FrameActive LineActive UserOutput6 LineTrigger FrameTrigger Exposure |
| Line7 | Off FrameActive LineActive UserOutput7 |
| Line8 | Off FrameActive LineActive UserOutput7 |
| Line9 | Fan UART0 |

## Line Selector

| Name | LineSelector | **Standard** |
| --- | --- | --- |
| Description | Selects the physical line (or pin) of the external device connector. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | Line1 |
| Availability | See enum entries table below. |
| Notes | Also check allPIXA evo and allPIXA neo for availability. |
| Error behavior | See the device error code documentation. |

Line Selector Enum Entries:

| Name | Availability | Description |
| --- | --- | --- |
| Line1 | ALL | Selects Line1 |
| Line2 | ALL | Selects Line2 |
| Line3 | ALL | Selects Line3 |
| Line4 | ALL | Selects Line4 |
| Line5 | ALL | Selects Line5 |
| Line6 | ALL | Selects Line6 |
| Line7 | ALL | Selects Line7 |
| Line8 | ALL | Selects Line8 |
| Line9 | EVO | Selects Line9 |
| Line10 | ALL | Selects Line10 |
| Line11 | EVO | Selects Line11 |

### Line Mode

| Name | LineMode[LineSelector] | **Standard** |
| --- | --- | --- |
| Description | Controls whether the physical line is used to input or output a signal. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | Input |
| Notes | - |
| Error behavior | See the device error code documentation. |

Line Mode Enum Entries:

| Name | Description |
| --- | --- |
| Input | The selected physical line is used to Input an electrical signal |
| Output | The selected physical line is used to Output an electrical signal |

### Line Inverter

| Name | LineInverter[LineSelector] | **Standard** |
| --- | --- | --- |
| Description | Controls the inversion of the signal of the selected input or output Line. |
| Interface | Boolean |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | **True** – The Line signal is inverted **False** – The Line signal is not inverted |
| Default value | **False** |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

### Line Status

| Name | LineStatus[LineSelector] | **Standard** |
| --- | --- | --- |
| Description | Returns the current status of the selected input or output Line. |
| Interface | Boolean |
| Access mode | Read only |
| Adjustable while grabbing | - |
| Value range | - |
| Default value | **True** – The level of the Line signal is High **False** – The level of the Line signal is low |
| Availability | ALL |
| Notes | - |
| Error behavior | - |

### Line Source

| Name | LineSource[LineSelector] | **Standard** |
| --- | --- | --- |
| Description | Selects which internal acquisition or I/O source signal to output on the selected Line. LineMode must be output. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | **Off** |
| Availability | See enum entries table below. |
| Notes | Also check allPIXA evo and allPIXA neo for availability. |
| Error behavior | See the device error code documentation. |

Line Source Enum Entries:

| Name | Availability | Description |
| --- | --- | --- |
| Off | ALL | Line output is disabled |
| FlashOut1 | EVO | Line output is Flash out 1 state. |
| FlashOut2 | EVO | Line output is Flash out 2 state. |
| FlashOut3 | EVO | Line output is Flash out 3 state. |
| FlashOut4 | EVO | Line output is Flash out 4 state. |
| FrameActive | ALL | Line output is Frame active state. |
| LineActive | ALL | Line output is Line active state. |
| MSOut | EVO | Line output is MasterSlave out state. |
| UserOutput3 | NEO | The UserOutput3 bit state as defined by its current UserOutputValue. |
| UserOutput4 | NEO | The UserOutput4 bit state as defined by its current UserOutputValue. |
| UserOutput5 | NEO | The UserOutput5 bit state as defined by its current UserOutputValue. |
| UserOutput6 | NEO | The UserOutput6 bit state as defined by its current UserOutputValue. |
| UserOutput7 | NEO | The UserOutput7 bit state as defined by its current UserOutputValue. |
| UserOutput8 | NEO | The UserOutput8 bit state as defined by its current UserOutputValue. |
| Fan | ALL | Line output is Fan |
| UART0 | NEO | Line output is UART |
| LineTrigger | NEO | Device is receiving a Line start trigger |
| FrameTrigger | NEO | Device is receiving a Frame start trigger |
| Exposure | NEO | Line output is Exposure |

### Line Format

| Name | LineFormat[LineSelector] | Standard |
| --- | --- | --- |
| Description | Controls the current electrical format of the selected physical input or output line. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | It depends on the LineSelector and the variant. |
| Availability | See enum entries table below. |
| Notes | Also check allPIXA evo and allPIXA neo for availability. |
| Error behavior | See the device error code documentation. |

Line Format Enum Entries:

| Name | Availability | Description |
| --- | --- | --- |
| NoConnect | NEO | The line is not connected. |
| SingleEnded_3V3 | ALL | The line is single ended input or output for 3.3V. Input signals less than 1.5V are considered as level low, signals higher than 1.5V as level high. |
| SingleEnded_5V | NEO | The line is single ended input for 5.0V or output for 3.3V. Input signals less than 2.5V are considered as level low, signals higher than 2.5V as level high. |
| SingleEnded_12V | NEO | The line is single ended input for 12.0V or output for 3.3V. Input signals less than 5.0V are considered as level low, signals higher than 5.0V as level high. |
| SingleEnded_24V | NEO | The line is single ended input for 24.0V or output for 3.3V. Input signals less than 5.0V are considered as level low, signals higher than 5.0V as level high. |
| RS422_NoTerm | NEO | The line is currently accepting or sending RS422 level signals with no electrical termination. |
| RS422 | ALL | The line is currently accepting or sending RS422 level signals. |
| Misc | ALL | The line is a special one |

## UserOutput Selector

| Name | UserOutputSelector | **Standard** |
| --- | --- | --- |
| Description | Selects which bit of the User Output register will be set by UserOutputValue. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | **UserOutput3** |
| Availability | NEO |
| Notes | - |
| Error behavior | See the device error code documentation. |

UserOutput Selector Enum Entries:

| Name | Description |
| --- | --- |
| UserOutput3 | Select the bit 3 of the User Output register. |
| UserOutput4 | Select the bit 4 of the User Output register. |
| UserOutput5 | Select the bit 5 of the User Output register. |
| UserOutput6 | Select the bit 6 of the User Output register. |
| UserOutput7 | Select the bit 7 of the User Output register. |
| UserOutput8 | Select the bit 8 of the User Output register. |

### UserOutput Value

| Name | UserOutputValue[UserOutputSelector] | **Standard** |
| --- | --- | --- |
| Description | Sets the value of the bit selected by UserOutputSelector. |
| Interface | Boolean |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | **True** – The selected UserOutput bit set to 1 **False** – The selected UserOutput bit set to 0 |
| Default value | **False** |
| Availability | NEO |
| Notes | - |
| Error behavior | See the device error code documentation. |

## IO Analyzer

### Trigger Activation

| Name | IOAnalyzerTriggerActivation | Custom |
| --- | --- | --- |
| Description | Selects the trigger condition for sampling. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | Auto |
| Availability | EVO |
| Notes | - |
| Error behavior | See the device error code documentation. |

Trigger Activation Enum Entries:

| Name | Description |
| --- | --- |
| Auto | Auto |
| FallingEdgeChA | Falling Edge Channel A |
| RisingEdgeChA | Rising Edge Channel A |
| FallingEdgeChB | Falling Edge Channel B |
| RisingEdgeChB | Rising Edge Channel B |
| FallingEdgeChAorB | Falling Edge Channel A or Channel B |
| RisingEdgeChAorB | Rising Edge Channel A or Channel B |

## Source Channel A

| Name | IOAnalyzerSourceChannelA | Custom |
| --- | --- | --- |
| Description | Selects an analyzer source for channel A. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | Off |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

Source Channel A Enum Entries:

| Name | Description |
| --- | --- |
| Off | Off |
| Line1 | Line1 |
| Line2 | Line2 |
| Line3 | Line3 |
| Line4 | Line4 |
| Line5 | Line5 |
| Line6 | Line6 |
| Line7 | Line7 |
| Line8 | Line8 |
| Line9 | Line9 |
| LinkTrigger0 | LinkTrigger0 |
| LinkTrigger1 | LinkTrigger1 |

### Source Channel B

| Name | IOAnalyzerSourceChannelB | Custom |
| --- | --- | --- |
| Description | Selects an analyzer source for channel B. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | Off |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

Source Channel B Enum Entries:

| Name | Description |
| --- | --- |
| Off | Off |
| Line1 | Line1 |
| Line2 | Line2 |
| Line3 | Line3 |
| Line4 | Line4 |
| Line5 | Line5 |
| Line6 | Line6 |
| Line7 | Line7 |
| Line8 | Line8 |
| Line9 | Line9 |
| LinkTrigger0 | LinkTrigger0 |
| LinkTrigger1 | LinkTrigger1 |

### Start Sampling

| Name | IOAnalyzerStartSampling | Custom |
| --- | --- | --- |
| Description | Starts sampling for the selected trigger condition. |
| Interface | Command |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | 1 |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

### Stop Sampling

| Name | IOAnalyzerStopSampling | Custom |
| --- | --- | --- |
| Description | Stops sampling for the selected trigger condition. |
| Interface | Command |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | 1 |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

### Sample Rate Reduction

| Name | IOAnalyzerSampleRateReduction | Custom |
| --- | --- | --- |
| Description | Selects the sample rate reduction factor. |
| Interface | Enumeration |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | See enum entries table below. |
| Default value | ReductionFactor_1 |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

Sample Rate Reduction Enum Entries:

| Name | Description |
| --- | --- |
| ReductionFactor_1 | No sample rate reduction |
| ReductionFactor_10 | Sample rate reduction by factor 10 |
| ReductionFactor_100 | Sample rate reduction by factor 100 |
| ReductionFactor_1000 | Sample rate reduction by factor 1000 |

### Sample Rate

| Name | IOAnalyzerSampleRate | Custom |
| --- | --- | --- |
| Description | Displays the sample rate in Hz. |
| Interface | Float |
| Access mode | Read Only |
| Adjustable while grabbing | No |
| Value range | - |
| Default value | - |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

### Trigger Position

| Name | IOAnalyzerTriggerPosition | Custom |
| --- | --- | --- |
| Description | Selects the trigger position for an io analyzer. |
| Interface | Integer |
| Access mode | Read/Write |
| Adjustable while grabbing | Yes |
| Value range | [0, 2047] |
| Default value | 0 |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

### IO Analyzer State

| Name | IOAnalyzerState | Custom |
| --- | --- | --- |
| Description | Displays the state of an IO analyzer. |
| Interface | Enumeration |
| Access mode | Read Only |
| Adjustable while grabbing | No |
| Value range | See enum entries table below. |
| Default value | PreEventSampling |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

IO Analyzer State Enum Entries:

| Name | Description |
| --- | --- |
| PreEventSampling | An IO Analyzer is in pre-event sampling state. |
| WaitForTrigger | An IO Analyzer is waiting for the trigger. |
| Sampling | An IO Analyzer is sampling the signal. |
| Finished | An IO Analyzer is stopped manually, or the buffer is full. |

### IO Analyzer State

| Name | IOAnalyzerState | Custom |
| --- | --- | --- |
| Description | Displays the state of an IO analyzer. |
| Interface | Enumeration |
| Access mode | Read Only |
| Adjustable while grabbing | No |
| Value range | See enum entries table below. |
| Default value | PreEventSampling |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

IO Analyzer State Enum Entries:

| Name | Description |
| --- | --- |
| PreEventSampling | An IO Analyzer is in pre-event sampling state. |
| WaitForTrigger | An IO Analyzer is waiting for the trigger. |
| Sampling | An IO Analyzer is sampling the signal. |
| Finished | An IO Analyzer is stopped manually, or the buffer is full. |

### IO Analyzer Status

| Name | IOAnalyzerStatus | Custom |
| --- | --- | --- |
| Description | Displays the status of an IO analyzer. |
| Interface | Enumeration |
| Access mode | Read Only |
| Adjustable while grabbing | No |
| Value range | See enum entries table below. |
| Default value | AnalyzerInactive |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

IO Analyzer Status Enum Entries:

| Name | Description |
| --- | --- |
| AnalyzerInactive | Analyzer is not active. |
| AnalyzerInProgress | Analyzer is either waiting for trigger or sampling. |
| Success | Sampling finished successfully. |
| Warning | An IO Analyzer is finished with warning. |
| AliasingWarning | Could not sample all the signal transition. |

### Event Count

| Name | IOAnalyzerEventCount | Custom |
| --- | --- | --- |
| Description | Displays the valid IO analyzer events occurred. |
| Interface | Integer |
| Access mode | Read Only |
| Adjustable while grabbing | No |
| Value range | [0, 2048] |
| Default value | 2048 |
| Availability | ALL |
| Notes | - |
| Error behavior | See the device error code documentation. |

Feature available for allPIXA evo and allPIXA neo

Feature available for allPIXA evo

Feature available for allPIXA neo