# H1\_8DO ## `H1_8DO` (FB) FUNCTION\_BLOCK H1\_8DO EXTENDS SlaveModuleDipSwitchOverwrite IMPLEMENTS ISlaveModule InOut: | Scope | Name | Type | Initial | Comment | Inherited from | | ----------- | ------------------------------ | ---------------- | ------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- | | Input | `itfModbusConnector` | IModbusConnector | | | BaseSlave | | Output | `xInitRunning` | `BOOL` | |

xInitRunning is TRUE, while the initialization
is performed on the first start.

| BaseSlave | | Output | `xInitFinished` | `BOOL` | |

xInitFinished is TRUE, as soon as on the first start
all parameters have been sent to the module.

| BaseSlave | | Output | `xAlarmCom` | `BOOL` | |

xAlarmCom is TRUE, when there is a
communication error.

| BaseSlave | | Output | `xBusy` | `BOOL` | |

xBusy is TRUE, when a Modbus request is being
executed.

| BaseSlave | | Output | `usiConfiguredSlaveID` | `USINT` | | Shows the currently set slave ID | BaseSlave | | Output | `eError` | ERROR | | No error = `ERROR.No_Error` | BaseSlave | | Output | `stDebugOutput` | DebugOutput | | | BaseSlave | | Input | `xEnable` | `BOOL` | TRUE |

Disables the module and resets all outputs to the
default initialization value

| BaseSlaveModule | | Input | `xReinitModule` | `BOOL` | |

Reinitializes the module and sends all parameters to the
module

| BaseSlaveModule | | Input | `xResetModule` | `BOOL` | |

Resets the module, clears the EEPROM memory, performs
a lamp test and restarts the module (Warning:
Afterwards autobauding is re-enabled)

| BaseSlaveModule | | Output | `wFirmware` | `WORD` | | Shows the current firmware of the module | BaseSlaveModule | | Output | `xAuto` | `BOOL` | |

FALSE = At least one input and/or one output are
in state eManBin <> eManBin.Auto. TRUE = All
inputs and outputs have the state eManBin =
eManBin.Auto (Note: If overriding by dip
switch (hardware) is disabled and the output is in
state eManBin <> eManBin.Auto, xAuto remains

TRUE. Evaluation is performed per output.)

| BaseSlaveModule | | Output | `xAutoSoftware` | `BOOL` | |

FALSE = At least one input and/or output are
by parameter (software) in state eManBin <>\
eManBin.Auto. TRUE = All inputs and outputs are
by parameter (software) in state eManBin =\
eManBin.Auto.

| SlaveModuleSoftOverwrite | | Output | `xAutoHardware` | `BOOL` | |

FALSE = At least one input and/or output are
by dip switch (hardware) in state eManBin <>\
eManBin.Auto. TRUE = All inputs and outputs are
by dip switch (hardware) in state eManBin =\
eManBin.Auto. (Note: If overriding by dip
switch (hardware) is disabled and the output is in
state eManBin <> eManBin.Auto, xAuto remains

TRUE. Evaluation is performed per output.)

| SlaveModuleDipSwitchOverwrite | | Input | `xDO1` | `BOOL` | | Digital output DO1 | | | Input | `xDO2` | `BOOL` | | Digital output DO2 | | | Input | `xDO3` | `BOOL` | | Digital output DO3 | | | Input | `xDO4` | `BOOL` | | Digital output DO4 | | | Input | `xDO5` | `BOOL` | | Digital output DO5 | | | Input | `xDO6` | `BOOL` | | Digital output DO6 | | | Input | `xDO7` | `BOOL` | | Digital output DO7 | | | Input | `xDO8` | `BOOL` | | Digital output DO8 | | | Output | `xDO1_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO2_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO3_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO4_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO5_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO6_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO7_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `xDO8_Fb` | `BOOL` | |

Feedback of digital output DO1. Takes into account the
evaluation of the manual override. Actual value - LED
Active = TRUE, LED Inactive = FALSE (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO1` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO2` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO3` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO4` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO5` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO6` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO7` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Output | `eAOO8` | eManBin | |

Manual - switch position (A)uto (O)ff (O)n (Query is performed
at the interval of the specified time of tReadFeedback)

| | | Input Const | `eDO8_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO8_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO8_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO7_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO7_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO7_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO6_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO6_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO6_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO5_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO5_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO5_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO4_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO4_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO4_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO3_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO3_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO3_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO2_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO2_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO2_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `eDO1_ManBin` | eManBin | eManBin.Auto | Manual override of the digital output | | | Input Const | `eDO1_SafeState` | DOSafeStateMode | DOSafeStateMode.OFF | State of the output in case of bus failure | | | Input Const | `xDO1_DeactivateDipSwitch` | `BOOL` | FALSE |

TRUE = Hardware manual override of the dip switch
deactivated

|

FALSE = Hardware manual override of the dip
switch activated

| | Input Const | `xUseSafeStateValueBeforeInit` | `BOOL` | TRUE | | | | Input Const | `tReadFeedback` | `TIME` | TIME#5s0ms | Polling time for feedback of digital outputs and manual override. (Note: The polling time must not be greater than the time of `tBusTimeout` .) | | | Input Const | `tSendDelayAfterInit` | `TIME` | TIME#0ms | Delay for sending the outputs | | | Input Const | `tBusTimeout` | `TIME` | TIME#20s0ms | `T#0s` = No bus timeout = No SafeState mode | | | Input Const | `usiSlaveID` | `USINT` | 10 | The slave address for the module | | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://support.powerio.com/hub/codesys-hvac/en/hvac-modbusio2-lib/funktionsbausteine/h1_8do.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.