SPLUSS_724X_MOD

SPLUSS_724X_MOD (FB)

FUNCTION_BLOCK SPLUSS_724X_MOD

General

This is a two-channel differential pressure transmitter (incl. calculation of the volume flow, incl. PT-1000 temperature sensor input).

7245: Measuring range: +/- 500 Pa (with manual zero-point calibration) (Channels 1 + 2) 7247: Measuring range: +/- 7000 Pa (with manual zero-point calibration) (Channels 1 + 2) 7249: Measuring range: +/- 500 Pa (with manual zero-point calibration) (Channel 1)

Measuring range: +/- 7000 Pa (with manual zero-point calibration) (Channel 2)

The transmitter can optionally be equipped with a display.

The actual volume flow is calculated based on the actual differential pressure value of channel 1

The Modbus interface is configured via DIP switches in the transmitter Modbus RTU Modbus address: 1 - 247 (0 = broadcast) 9600 - 38400 baud For data backup, the options 1-8-E-1, 1-8-O-1, 1-8-N-2 and 1-8-N-1 (deviating from the standard specifications) can be set.

A terminating resistor (120 ohms) can be activated / deactivated via DIP switch.

The calculation coefficients for the volume flow display are not stored fail-safe without power supply. They must therefore be written again when error-free communication is resumed.

The adjustment of the differential pressure transmitter must be carried out in the device using hardware, because further derived measured variables (volume flow - actual value) are calculated from this actual value.

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	xUpdateConfigWrite	BOOL	FALSE	Configuration update (write access) ( with every rising edge)
Input	xResError	BOOL	FALSE	Reinitialization of the output eErrorCodeCom (with every rising edge)
Inout	ModbusClient	ModbusClientBase		Client of the device
Output	rDifPressureCH1	REAL		Differential pressure - channel 1 unfiltered
Output	rDifPressureCH1_1s	REAL		Differential pressure - channel 1 filtered 1s
Output	rDifPressureCH1_10s	REAL		Differential pressure - channel 1 filtered 10s
Output	rVolumeFlowCH1	REAL		Volume flow - channel 1
Output	rDifPressureCH2	REAL		Differential pressure - channel 2 unfiltered
Output	rDifPressureCH2_1s	REAL		Differential pressure - channel 2 filtered 1s
Output	rDifPressureCH2_10s	REAL		Differential pressure - channel 2 filtered 10s
Output	rTemperature	REAL		Temperature unfiltered
Output	rTemperature_10s	REAL		Temperature filtered 10s
Output	xSensorOffsetInDevice	BOOL		Indication of whether the sensors must be calibrated in the device (TRUE = calibration in the device required, FALSE = calibration in the FB required)
Output	xAlarm	BOOL		Collective fault (TRUE = fault)
Output	xAlarmCom	BOOL		Collective fault - communication (TRUE = fault)
Output	eErrorCodeCom	ModbusErrorCode		Error code - communication (0 = no error)
Output	xBusy	BOOL		Communication indicator (TRUE = communication)
Input Const	stDisplayText	STRING(7)	powerIO	Any text with 7 characters (fixed length) in the bottom display line (characters H - N)
Input Const	eDisplayValue	SPLUSS_724X_MOD_DISPLAY_VALUE	SPLUSS_724X_MOD_DISPLAY_VALUE.Standard_Display	Definition of the value to be displayed (static) (0 = Standard display)
Input Const	xDisplayAvailable	BOOL	FALSE	Specification of whether a display is present (TRUE = display is present)
Input Const	eVolFlowEquationType	SPLUSS_724X_MOD_VOL_FLOW_EQUATION_TYPE	SPLUSS_724X_MOD_VOL_FLOW_EQUATION_TYPE.Rosenberg_Comefri_Gebhardt_Nicotra	Selection of the fan manufacturer to determine the formula for calculating the volume flow
Input Const	rVolFlowConstant	REAL	100.0	K factor for calculating the current volume flow (1.0 - 2000.0)
Input Const	xEnAutoZero	BOOL	TRUE	Enable / disable the automatic, cyclical zero-point adjustment (TRUE = enable)
Input Const	eUnitType	SPLUSS_724X_MOD_UNIT_TYPE	SPLUSS_724X_MOD_UNIT_TYPE.Type_SI	Central selection of the unit system (0 = SI)
Input Const	eDeviceType	SPLUSS_724X_MOD_DEVICE_TYPE	SPLUSS_724X_MOD_DEVICE_TYPE.Type_7245	Selection of the device type (1 = 7148 = +/- 500Pa)
Input Const	tTimeUpdateConfigWrite	TIME	TIME#0ms	Update interval for the processes influenced by the input xUpdateConfigWrite influenced
Input Const	tTimeUpdateSetp	TIME	TIME#0ms	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