SPLUSS_LCD_SHD_MODBUS_EASY

SPLUSS_LCD_SHD_MODBUS_EASY (FB)

FUNCTION_BLOCK SPLUSS_LCD_SHD_MODBUS_EASY

General

This is a display module (Input: 0.0 - 10.0V, Output: Modbus - RTU) for a pressure transmitter (e.g. PREMASGARD SHD-U / SHD-SD-U / SHD692-U) with connector DIN EN 175301-803-A

The configuration of the Modbus interface and other parameters is done on the display module (variant 1). The configuration of further parameters is alternatively done via a function block 'SPLUSS_LCD_SHD_MODBUS_FULL' (variant 2).

The measurement value offset cannot be adjusted either in the device or via Modbus.

A termination resistor (120 ohm) can be enabled/disabled via DIP switch.

The Modbus interface is parameterized as follows without further settings:

RTU 9600 Baud 8 data bits No parity 1 stop bit Device address = 1

The following register ranges may be written with FC16: 21-24, 28-29 and 31-34

Neither in the device (hardware / display menu) nor via Modbus is an adjustment of the measurement value offset provided. Therefore no adjustment may be provided in the function block (program value <> display value).

InOut:

Scope	Name	Type	Initial	Comment
Input	xEn	BOOL	TRUE	Enable / disable of communication ( TRUE = enabled )
Input	byUnitId	BYTE	0	Device address ( 1 .. 247 )
Input	xUpdateActual	BOOL	FALSE	Update of the actual values (on every rising edge ) (Range: Operation)
Input	xResError	BOOL	FALSE	Reinitialization of the output ‘eErrorCodeCom’ (on each rising edge)
Inout	ModbusClient	ModbusClientBase		Client of the device
Output	rInputVolt	REAL		Input voltage from the pressure sensor in XX.XXX volts
Output	rPressure	REAL		Differential pressure in XX.XX bar
Output	rPressureAverage	REAL		Time-averaged differential pressure in XX.XX bar
Output	rPressureMinRamge	REAL		Minimum value of the range for the differential pressure in XX.XX bar (depending on the sensor's measurement range)
Output	rPressureMaxRange	REAL		Maximum value of the range for the differential pressure in XX.XX bar (depending on the sensor's measurement range)
Output	rPressureMinInterv	REAL		Absolute minimum value of the differential pressure in XX.XX bar in the set interval
Output	rPressureMaxInterv	REAL		Absolute maximum value of the differential pressure in XX.XX bar in the set interval
Output	rPressureDisplay	REAL		Display value on the display (depending on the unit set for the display)
Output	eUnitDisplay	SPLUSS_LCD_SHD_MODBUS_EASY_DISPLAY_UNIT		Unit of the display value on the display
Output	wDeviceCode	WORD		Device - code of the device
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	tTimeUpdateActual	TIME	TIME#3s0ms	Update interval for the processes affected by the input ‘xUpdateActual’