> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/codesys-hvac/en/hvac-modbus-library/functionblocks/wilo/wilo_stratos_maxo_mono.md). # WILO\_STRATOS\_MAXO\_MONO ## `WILO_STRATOS_MAXO_MONO` (FB) `FUNCTION_BLOCK` WILO\_STRATOS\_MAXO\_MONO ### Representation
InOut: | Scope | Name | Type | Initial | Comment | | ----------- | ----------------------- | ------------------------------- | --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Input | `xEn` | `BOOL` | TRUE | Enable / disable communication (TRUE = enable) | | Input | `byUnitId` | `BYTE` | 0 | Device address (1 .. 247) | | Input | `xUpdateActual` | `BOOL` | FALSE |

Update of actual values (on every rising edge
)

| | Input | `xUpdateSetp` | `BOOL` | FALSE |

Update of setpoints (on every rising edge
)

| | Input | `xOverride_Off` | `BOOL` | FALSE |

Enable / disable override - pump off (FALSE =
Off, TRUE = On)

| | Input | `xOverride_Max` | `BOOL` | FALSE |

Enable / disable override - maximum operation (
FALSE = Off, TRUE = On)

| | Input | `xOverride_Min` | `BOOL` | FALSE |

Enable / disable override - minimum operation (
FALSE = Off, TRUE = On)

| | Input | `xOverride_On` | `BOOL` | FALSE |

Enable / disable override - pump on (FALSE =
Off, TRUE = On)

| | Input | `xEn_Auto` | `BOOL` | FALSE |

Enable / disable automatic mode (FALSE = Off,
TRUE = On)

| | Input | `xAutoNightMode` | `BOOL` | FALSE |

Enable / disable automatic setback function (FALSE
= Off, TRUE = On)

| | Input | `rSetp` | `REAL` | 0.0 |

Setpoint - pump (unit/range depending on operating mode
)

| | Inout | `ModbusClient` | `ModbusClientBase` | | Client of the device | | Output | `wPumpCommandFb` | `WORD` | | Current pump command | | Output | `eOperationModeFb` | Wilo\_ControlStat | | Current pump operating mode (control / regulation) | | Output | `xReady` | `BOOL` | |

Current readiness message from the pump (TRUE readiness
)

| | Output | `xOperation` | `BOOL` | | Current operating message from the pump (TRUE = operation) | | Output | `xService` | `BOOL` | |

Current readiness message from the pump (TRUE = service
action required)

| | Output | `xWarning` | `BOOL` | | Current warning message from the pump (TRUE = warning active) | | Output | `xErrorRestart` | `BOOL` | |

Current fault message (with restart attempt) from the pump
(TRUE = fault active)

| | Output | `xError` | `BOOL` | |

Current fault message (without restart attempt) from the
pump (TRUE = fault active)

| | Output | `rPressure` | `REAL` | | Current actual pressure value in XX.XX bar | | Output | `rFlow` | `REAL` | | Current flow rate (estimated) in XX.XX bar | | Output | `rFluidTemp` | `REAL` | | Current medium temperature in XX.X degrees Celsius | | Output | `rForwardTemp` | `REAL` | | Current flow temperature in XX.X degrees Celsius | | Output | `rReturnTemp` | `REAL` | | Current return temperature in XX.X degrees Celsius | | Output | `wSpeed` | `WORD` | | Current pump speed in XXX rpm | | Output | `wElecPower` | `WORD` | | Current electrical input power in XXX W | | Output | `wElecEnergyTotal` | `WORD` | | Total electrical energy consumed in XXX kWh | | Output | `rPowerHeating` | `REAL` | | Current heating output in the heating circuit in XXX W | | Output | `rPowerCooling` | `REAL` | | Current cooling output in the cooling circuit in XXX W | | Output | `rHeatEnergyTotal` | `REAL` | | Total heat quantity in XXX kWh (non-resettable) | | Output | `rCoolEnergyTotal` | `REAL` | | Total cooling quantity in XXX kWh (non-resettable) | | Output | `rHeatEnergyDiff` | `REAL` | |

Total heat quantity in XXX kWh (since the last reset
)

| | Output | `rCoolEnergyDiff` | `REAL` | |

Total cooling quantity in XXX kWh (since the last reset
)

| | Output | `wOperatingHours` | `WORD` | | Current number of operating hours in XXX h | | Output | `eSetpSource` | Wilo\_Signal\_Source | | Current setpoint source (1 = IF module) | | Output | `wFWVersionCIF` | `WORD` | | Current firmware version of the IF module | | Output | `rAI1Value` | `REAL` | | Current measured value at analog input 1 | | Output | `eAI1Unit` | WILO\_ANALOG\_INPUT\_UNIT\_CODE | | Current unit for analog input 1 | | Output | `xAI1Error` | `BOOL` | | Fault condition at analog input 1 (TRUE = fault) | | Output | `rAI2Value` | `REAL` | | Current measured value at analog input 2 | | Output | `eAI2Unit` | WILO\_ANALOG\_INPUT\_UNIT\_CODE | | Current unit for analog input 2 | | Output | `xAI2Error` | `BOOL` | | Fault condition at analog input 2 (TRUE = fault) | | Output | `eBusCommandFb` | WILO\_BUS\_COMMAND\_CODE | |

Current status of enabling / disabling local
operation (1 = local operation locked)

| | Output | `xAlarm` | `BOOL` | FALSE | Collective fault (TRUE = fault) | | Output | `xAlarmCom` | `BOOL` | FALSE | Collective fault - communication (TRUE = fault) | | Output | `eErrorCodeCom` | ModbusErrorCode | | Error code - communication (0 = no error) | | Output | `wErrorCodeDev` | `WORD` | 0 | Error code - device (0 = no error) | | Output | `xBusy` | `BOOL` | | Communication indicator (TRUE = communication) | | Input Const | `eSetpSigSource_Preset` | Wilo\_Signal\_Source | Wilo\_Signal\_Source.IF\_Module |

Signal source for the current control mode — parameter set PRESET
1 = IF module

| | Input Const | `xPumpOn_Preset` | `BOOL` | TRUE |

Enable / disable pump — parameter set PRESET
TRUE = enable

| | Input Const | `eOperationMode_Preset` | Wilo\_ControlStat | Wilo\_ControlStat.gen\_speed |

Pump operating mode (control / regulation) — parameter set PRESET
1 = speed control

| | Input Const | `rSetp_Preset` | `REAL` | 50.0 |

Setpoint - pump (unit/range depending on operating mode
) — parameter set PRESET

| | Input Const | `eSetpSigSource` | Wilo\_Signal\_Source | Wilo\_Signal\_Source.IF\_Module |

Signal source for the current control mode
1 = IF module

| | Input Const | `iBusCommandTimeout` | `INT` | 300 | Timeout for the 'Bus Command' command | | Input Const | `eBusCommand` | WILO\_BUS\_COMMAND\_CODE\_SET | WILO\_BUS\_COMMAND\_CODE\_SET.OFF |

Enable / disable local operation
OFF = Local operation is permanently locked
SET = If communication fails, local operation is released after the time period iBusCommandTimeout released
MANUAL = Local operation and operation via the Modbus interface are enabled
SET\_PRESET = If communication fails, local operation is released after the time period iBusCommandTimeout released and the pump is operated according to the 4 parameters of the parameter set PRESET operated.

| | Input Const | `eOperationMode` | Wilo\_ControlStat | Wilo\_ControlStat.gen\_speed |

Pump operating mode (control / regulation)
1 = speed control

| | Input Const | `tTimeUpdateSetp` | `TIME` | TIME#45s0ms |

Update interval for the processes influenced by the input
xUpdateSetp influenced

| | Input Const | `tTimeUpdateActual` | `TIME` | TIME#3s0ms |

Update interval for the processes influenced by the input
xUpdateActual influenced

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