FB_MBUS_EMU_32x7

The function block FB_MBUS_EMU_32x7 is used to read electricity meters from EMU:

-EMU32.x7

Only the standard meter data will be read. The meter transmits this data in the standard EMU parameterization, or if the parameter set is set in the device to 00000 hexadecimal. Please refer to the meter documentation for further information regarding this.

	In the normal version, the current consumption of the M-Bus interface is equivalent to 3 standard loads. If an M-BUS master interface is used that is designed, for example, for up to 120 standard loads, a maximum of 40 EMU M-BUS meters can be connected. The meter can optionally be supplied with 230 V. The current consumption of the M-Bus interface is then equivalent to one standard load.

The transmission of data from the EMU meter to the M-Bus protocol computer only works if the EMU meter is connected to at least two phases of the mains voltage network.

The EMU meter transmits current data to the device’s M-Bus interface every 40 seconds, so that the readout data is approx. 40 - 45 seconds old.

The function block can only be executed together with the function block FB_MBUSKL6781().

	Further information See Operating principle of the function block

Inputs

VAR_INPUT
  usiAddress   : USINT;
  stSecAdr     : ST_MBUS_SecAdr;
  eBaudrate    : E_MBUS_Baudrate := eMBUS_Baud2400;
  bStart       : BOOL;
  bSND_NKE     : BOOL := TRUE;
  bReadInit    : BOOL := TRUE;
  tMinSendTime : TIME := t#2s;
  usiUnit      : USINT;
  bDisabled    : BOOL := FALSE;
END_VAR

Name	Type	Description
usiAddress	USINT	Primary address of the meter to be read with this function block.
stSecAdr	ST_MBUS_SecAdr	Secondary address of the meter to be read with this function block.
eBaudrate	E_MBUS_Baudrate	300, 600, 1200, 2400, 4800, 9600 baud
bStart	BOOL	All meters are read once on the positive edge of this input.
bSND_NKE	BOOL	TRUE initializes the meter for each read operation and sets the meter to the first telegram (SND_NKE).
bReadInit	BOOL	If the PLC is restarted, the meter is read once.
tMinSendTime	TIME	Default t#2s. The meter is read again, once the time set here has elapsed. If t#0s the meter is not read and can be read manually with bStart.
usiUnit	USINT	Unit of the energy values to be output by the function block. 0=W(h) / 1=KW(h) / 2 =MW(h) / 3=GW(h).
bDisabled	BOOL	TRUE = deselection of the function block

Inputs/outputs

VAR_IN_OUT
  stCom : ST_MBUS_Communication;
END_VAR

Name	Type	Description
stCom	ST_MBUS_Communication	This structure is used to link the function block FB_MBUSKL6781() with the meter blocks.

Outputs

VAR_OUTPUT
  bBusy           : BOOL;
  bReady          : BOOL;
  bError          : BOOL;
  eError          : E_MBUS_ERROR;
  dwIdNumber      : DWORD;
  byStatus        : BYTE;
  byGEN           : BYTE;
  byCounter       : BYTE;
  usiRecivedAdr   : USINT;
  eMedium         : E_MBUS_Medium;
  sMan            : STRING(3);
  stOperatingHours: ST_MBus_Info;
  stEnergy        : ST_MBus_Info;
  stPower         : ST_MBus_Info;
  stInitCounter   : ST_MBus_Info;
  stDeviceError   : ST_MBus_Info;
END_VAR

Name	Type	Description
bBusy	BOOL	The bBusy output is TRUE as long as the meter is being read.
bReady	BOOL	The bReady output is TRUE for one cycle, once meter reading is completed.
bError	BOOL	This output goes TRUE as soon as an error occurs. This error is described via the eError variable.
eError	E_MBUS_ERROR	This output outputs an error code in the event of an error. bError goes TRUE at the same time.
dwIdNumber	DWORD	Serial number of the meter (secondary address)
byStatus	BYTE	Device status
byGEN	BYTE	Software version of the device
byCounter	BYTE	Number of times the master has accessed data of the respective slave
usiRecivedAdr	USINT	Received primary address (0-250)
eMedium	E_MBUS_Medium	Medium
sMan	STRING	Manufacturer sign
stOperatingHours	ST_MBus_Info	Operating hours of the EMU meter
stEnergy	ST_MBus_Info	Meter reading, energy consumption
stPower	ST_MBus_Info	Current energy consumption, power
stInitCounter	ST_MBus_Info	Number of power failures at the EMU meter
stDeviceError	ST_MBus_Info	Error message from the device

Requirements

Development Environment	PLC library to include
TwinCAT from v3.1.4020.14	Tc2_MBus from 3.3.5.0