# BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD ## `BELIMO_EPXXXR2_BAC_FW_4_2_0_MOD` (FB) `FUNCTION_BLOCK` BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD ### **Representation**
### Guidelines - software creation The following function codes (FC) are supported: 3, 4 (additionally: 2, 4, 16) For write operations to 32-bit data points (2 consecutive Modbus registers), FC16 must be used. No further registers may then be written in this telegram. Format of 32-bit data points: Register+0 (LSW): H-byte L-byte Register+1 (MSW): H-byte L-byte FC 02 may only be used for register 105 (Malfunction and service information, start address = 1664). * For addressing, the address specifications must be used, not the register addresses. * For unused registers, the value 65535 (dec.) is read/written. * The Modbus addresses 1 - 247 can be set with the known Belimo tools. * All writable register addresses > 100 are persistent and must not be written cyclically * The device firmware cannot currently (06.09.2024) be read from address 103. The value 0 is always read. * Measured values - adjustment: Class ??? * There are no measurable variables available for adjustment. InOut: | Scope | Name | Type | Initial | Comment | | ----------- | ----------------------- | ---------------------------------------------------------- | ------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Input | `xEn` | `BOOL` | TRUE | Enable / disable communication (TRUE = enable) | | Input | `byUnitId` | `BYTE` | 1 | Address of the device (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 | `xUpdateConfig` | `BOOL` | FALSE |

Update of the configuration (on every rising
edge) (write access)

| | Input | `xUpdateInfo` | `BOOL` | FALSE |

Update of the information (on every rising
edge)

| | Input | `xResError` | `BOOL` | FALSE |

Reinitialization of the outputs eErrorCodeCom or
xErrorCodeDev to the error-free state (on every
rising edge)

| | Input | `rRelSetp` | `REAL` | 0.0 |

Relative setpoint - position/air volume flow in % (0.0% =
rAbsVolFlowLimitMinFb, 100.0% = rAbsVolFlowLimitMaxFb)

| | Input | `eCommand` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_COMMAND | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_COMMAND.None | Command for service functions (0 = None) | | Input | `eOverrideCon` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_OVERRIDE\_CONTROL | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_OVERRIDE\_CONTROL.None |

Force override of the control signal - position/air volume flow
(0 = None)

| | Inout | `ModbusClient` | `ModbusClientBase` | | Client of the device | | Output | `eSetpSourceFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SETPOINT\_SOURCE | |

Actual values\_1: feedback - source for the setpoint -
position/air volume flow (1 = Modbus)

| | Output | `eControlModeFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_CONTROL\_MODE | |

Actual values\_1: feedback - control mode (1 =
air volume flow)

| | Output | `rRelSetpFb` | `REAL` | |

Actual values\_0: feedback - relative setpoint -
position/air volume flow in % (0.0 - 100.0 %)

| | Output | `rRelSetpAnalog` | `REAL` | |

Actual values\_0: relative setpoint - position/air volume flow in %
(0.0 - 100.0 %) from input 0 - 10V (address 118 = 0 =
analog)

| | Output | `rRelPos` | `REAL` | | Actual values\_0: relative position in XXX.X % | | Output | `rAbsPos` | `REAL` | |

Actual values\_0: absolute position in XXX degrees (rotation) or
mm (linear movement)

| | Output | `rRelVolFlow` | `REAL` | |

Actual values\_0: relative air volume flow in % (0.0 - 150.0 %) (
relative to ‘Maximum volumetric flow limit - address 106)

| | Output | `rRelVolFlowLimitMin` | `REAL` | |

Actual values\_1: limit value - minimum percentage air volume
flow (reference: Vnom) (Control\_Mode = Flow Control) (2.5%
Vnom - 100.0% Vmax)

| | Output | `rRelVolFlowLimitMax` | `REAL` | |

Actual values\_1: limit value - maximum percentage air volume
flow (reference: Vnom) (Control\_Mode = Flow Control) (25.0%
Vnom - 100.0% Vnom)

| | Output | `rNomAbsVolFlowUnit` | `REAL` | |

Nominal air volume flow in the selected unit (addresses
112 and 113) (unit definition in address 147)

| | Output | `rSetpAbsVolFlowUnit` | `REAL` | |

Actual values\_0: setpoint for the absolute air volume flow in the
selected unit (unit definition in address 147)

| | Output | `rAbsVolFlowUnit` | `REAL` | |

Actual values\_0: absolute air volume flow in the selected unit
(unit definition in address 147)

| | Output | `eVolFlowUnitFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_FLOW\_UNIT | |

Actual values\_1: feedback - unit for the absolute
air volume flow (unit definition in address 147)

| | Output | `rAbsVolFlowLimitMinFb` | `REAL` | |

Actual values\_1: feedback - limit value - minimum absolute
air volume flow (reference: Vnom) (Control\_Mode = Flow
Control) (2.5% Vnom - 100.0% Vmax)

| | Output | `rAbsVolFlowLimitMaxFb` | `REAL` | |

Actual values\_1: feedback - limit value - maximum absolute
air volume flow (reference: Vnom) (Control\_Mode = Flow
Control) (25.0% Vnom - 100.0% Vnom)

| | Output | `rTemp_Deg` | `REAL` | | Actual values\_0: current temperature in degrees Celsius | | Output | `rTemp_Fah` | `REAL` | | Actual values\_0: current temperature in degrees Fahrenheit | | Output | `rRelGlycolCon` | `REAL` | | Actual values\_0: current glycol concentration in percent | | Output | `dwTotalWaterVolume` | `DWORD` | |

Actual values\_0: total water volume in the selected unit (
unit definition in address 149)

| | Output | `eVolumeUnitFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_UNIT | |

Actual values\_1: feedback - unit of the total water volume (
unit definition in address 149)

| | Output | `eOverrideConFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_OVERRIDE\_CONTROL | | Actual values\_0: current state - force override of the control signal - position/air volume flow (0 = None) | | Output | `rSensor1ValueUnit` | `REAL` | |

Actual values\_0: current value of sensor 1 in the selected
unit (address 120: sensor type)

| | Output | `eSensor1TypeFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SENSOR\_1\_TYPE | |

Active: 0 - 65535 mV // Switch: 0.0 or 1.0
Actual values\_1: feedback - sensor type (address 120: sensor type)

| | Output | `eCommandFb` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_COMMAND | |

Actual values\_0: current state - command for service functions
(0 = None)

| | Output | `eDeviceType` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_DEVICE\_TYPE | |

Actual values\_0: current state - type of the device (0 = Device
not connected)

| | Output | `eBusTermin` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_BUS\_TERMINATION | |

Information\_0: status of the Modbus terminating resistor (
Active = Enabled)

| | Output | `sSerialNum` | `STRING` | | Information\_0: serial number of the device | | Output | `wFirmwareVer` | `WORD` | | Information\_0: firmware version of the device | | Output | `eAO` | eManNum | eManNum.Auto |

Display - manual override on the device (actuator disconnected)
(0 = Automatic)

| | 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 | `stErrorCodeDev` | `STRING` | |

String with the numbers of the active device errors (error bits
0 - 15)

| | Output | `xBusy` | `BOOL` | | Communication display (TRUE = communication) | | Input Const | `eVolumeUnit` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_UNIT | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_UNIT.m3 |

Unit of the total water volume (unit definition in
address 149)

| | Input Const | `eVolFlowUnit` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_FLOW\_UNIT | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_VOLUME\_FLOW\_UNIT.m3\_per\_hour |

Unit for the absolute air volume flow (unit definition in
address 147)

| | Input Const | `rMaxAbsVolFlowUnit` | `REAL` | 40.0 |

Maximum value for the absolute air volume flow in the selected
unit (0.25rNomAbsVolFlowUnit … 1.0rNomAbsVolFlowUnit
) (unit definition in address 147)

| | Input Const | `rMinAbsVolFlowUnit` | `REAL` | 20.0 |

Minimum value for the absolute air volume flow in the selected
unit (0 … rMaxAbsVolFlowUnit) (unit definition in
address 147)

| | Input Const | `eSensor_1_Type` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SENSOR\_1\_TYPE | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SENSOR\_1\_TYPE.None | Definition of the type of sensor 1 (0 = None) | | Input Const | `eSetpSource` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SETPOINT\_SOURCE | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_SETPOINT\_SOURCE.Bus |

Source for the setpoint - position/air volume flow (1 = Modbus
)

| | Input Const | `eControlMode` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_CONTROL\_MODE | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_CONTROL\_MODE.Flow\_Control | Control mode (1 = air volume flow) | | Input Const | `tBusFailTimeout` | `TIME` | TIME#2m0s0ms | Time period for evaluating a communication error | | Input Const | `eBusFailAction` | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_BUS\_FAIL\_ACTION | BELIMO\_EPXXXR2\_BAC\_FW\_4\_2\_0\_MOD\_BUS\_FAIL\_ACTION.None |

Action when a communication error occurs (0 =
none)

| | Input Const | `tTimeUpdateInfo` | `TIME` | TIME#0ms |

Update interval for the processes influenced by the input
xUpdateInfo influenced

| | Input Const | `tTimeUpdateConfig` | `TIME` | TIME#0ms |

Update interval for the processes influenced by the input
xUpdateConfig influenced

| | 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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